A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_URI::$config is deprecated
Filename: core/URI.php
Line Number: 101
Backtrace:
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Router::$uri is deprecated
Filename: core/Router.php
Line Number: 127
Backtrace:
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$benchmark is deprecated
Filename: core/Controller.php
Line Number: 75
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$hooks is deprecated
Filename: core/Controller.php
Line Number: 75
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$config is deprecated
Filename: core/Controller.php
Line Number: 75
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$log is deprecated
Filename: core/Controller.php
Line Number: 75
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$utf8 is deprecated
Filename: core/Controller.php
Line Number: 75
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$uri is deprecated
Filename: core/Controller.php
Line Number: 75
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$exceptions is deprecated
Filename: core/Controller.php
Line Number: 75
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$router is deprecated
Filename: core/Controller.php
Line Number: 75
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$output is deprecated
Filename: core/Controller.php
Line Number: 75
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$security is deprecated
Filename: core/Controller.php
Line Number: 75
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$input is deprecated
Filename: core/Controller.php
Line Number: 75
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$lang is deprecated
Filename: core/Controller.php
Line Number: 75
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$load is deprecated
Filename: core/Controller.php
Line Number: 78
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: Warning
Message: "continue" targeting switch is equivalent to "break". Did you mean to use "continue 2"?
Filename: helpers/ben_helper.php
Line Number: 302
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Optional parameter $author_name declared before required parameter $filename is implicitly treated as a required parameter
Filename: helpers/ben_helper.php
Line Number: 841
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$db is deprecated
Filename: core/Loader.php
Line Number: 390
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_DB_mysqli_driver::$failover is deprecated
Filename: database/DB_driver.php
Line Number: 371
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$pagination is deprecated
Filename: core/Loader.php
Line Number: 1279
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$agent is deprecated
Filename: core/Loader.php
Line Number: 1279
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$zip is deprecated
Filename: core/Loader.php
Line Number: 1279
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Optional parameter $options declared before required parameter $closed is implicitly treated as a required parameter
Filename: models/Poll_model.php
Line Number: 191
Backtrace:
File: /home/scotchem/public_html/talks/application/libraries/Poll_lib.php
Line: 25
Function: model
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$poll_model is deprecated
Filename: core/Loader.php
Line Number: 353
Backtrace:
File: /home/scotchem/public_html/talks/application/libraries/Poll_lib.php
Line: 25
Function: model
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$poll_lib is deprecated
Filename: core/Loader.php
Line Number: 1279
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$encryption is deprecated
Filename: core/Loader.php
Line Number: 1279
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$xmlrpc is deprecated
Filename: core/Loader.php
Line Number: 1279
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$form_validation is deprecated
Filename: core/Loader.php
Line Number: 1279
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$email is deprecated
Filename: core/Loader.php
Line Number: 1279
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$upload is deprecated
Filename: core/Loader.php
Line Number: 1279
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$paypal is deprecated
Filename: core/Loader.php
Line Number: 1279
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Return type of CI_Session_database_driver::open($save_path, $name) should either be compatible with SessionHandlerInterface::open(string $path, string $name): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_database_driver.php
Line Number: 129
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Return type of CI_Session_database_driver::close() should either be compatible with SessionHandlerInterface::close(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_database_driver.php
Line Number: 278
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Return type of CI_Session_database_driver::read($session_id) should either be compatible with SessionHandlerInterface::read(string $id): string|false, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_database_driver.php
Line Number: 149
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Return type of CI_Session_database_driver::write($session_id, $session_data) should either be compatible with SessionHandlerInterface::write(string $id, string $data): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_database_driver.php
Line Number: 206
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Return type of CI_Session_database_driver::destroy($session_id) should either be compatible with SessionHandlerInterface::destroy(string $id): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_database_driver.php
Line Number: 295
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Return type of CI_Session_database_driver::gc($maxlifetime) should either be compatible with SessionHandlerInterface::gc(int $max_lifetime): int|false, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_database_driver.php
Line Number: 333
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 284
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: Warning
Message: session_set_cookie_params(): Session cookie parameters cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 291
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 306
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 316
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 317
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 318
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 319
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 377
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: Warning
Message: session_set_save_handler(): Session save handler cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 110
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: Warning
Message: session_start(): Session cannot be started after headers have already been sent
Filename: Session/Session.php
Line Number: 143
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$session is deprecated
Filename: core/Loader.php
Line Number: 1279
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$email_model is deprecated
Filename: core/Loader.php
Line Number: 353
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$pagination_model is deprecated
Filename: core/Loader.php
Line Number: 353
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$image_lib is deprecated
Filename: core/Loader.php
Line Number: 1279
Backtrace:
File: /home/scotchem/public_html/talks/application/models/Crud_model.php
Line: 13
Function: library
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Crud_model::$account_type is deprecated
Filename: models/Crud_model.php
Line Number: 15
Backtrace:
File: /home/scotchem/public_html/talks/application/models/Crud_model.php
Line: 15
Function: _error_handler
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$crud_model is deprecated
Filename: core/Loader.php
Line Number: 353
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$sms_model is deprecated
Filename: core/Loader.php
Line Number: 353
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 15
Function: __construct
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$dbutil is deprecated
Filename: core/Loader.php
Line Number: 425
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 16
Function: dbutil
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property Talks::$backup is deprecated
Filename: core/Loader.php
Line Number: 353
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 21
Function: model
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: Warning
Message: Cannot modify header information - headers already sent by (output started at /home/scotchem/public_html/talks/system/core/Exceptions.php:271)
Filename: controllers/Talks.php
Line Number: 64
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 64
Function: setcookie
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: ctype_digit(): Argument of type null will be interpreted as string in the future
Filename: libraries/Pagination.php
Line Number: 522
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 99
Function: create_links
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$benchmark is deprecated
Filename: core/Loader.php
Line Number: 925
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 108
Function: view
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$hooks is deprecated
Filename: core/Loader.php
Line Number: 925
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 108
Function: view
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$config is deprecated
Filename: core/Loader.php
Line Number: 925
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 108
Function: view
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$log is deprecated
Filename: core/Loader.php
Line Number: 925
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 108
Function: view
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$utf8 is deprecated
Filename: core/Loader.php
Line Number: 925
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 108
Function: view
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
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Viewing Talks |
ScotCHEM Colloquia
Skip to content
Viewing
upcoming talks containing the keyword: 20
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Speaker:
Prof Dan Nocera (Harvard)
The artificial leaf accomplishes a solar fuels process that captures the elements of photosynthesis – the splitting of water to hydrogen and oxygen using light, from neutral water, at atmospheric pressure and room temperature. These conditions are met owing to the development of water splitting catalysts of the elements of Mn, Co and Ni that are self-healing; the design principles for self-healing catalysis will be presented. The self-healing catalysts are coated on a silicon wafer in a buried junction configuration, which enables light harvesting and charge separation to be coupled to catalysis under simple conditions. We have advanced the design of the artificial leaf by utilizing the hydrogen from the artificial leaf and combining it with carbon dioxide to make liquid fuels. Using the tools of synthetic biology, a bio-engineered bacterium has been developed to convert carbon dioxide, along with the hydrogen produced from the artificial leaf, into biomass and fusel alcohols. This hybrid microbial | artificial leaf system scrubs 180 grams of CO2 from air, equivalent to 230,000 liters of air per 1 kWh of electricity. Coupling this hybrid device to existing photovoltaic systems leads to unprecedented solar-to-biomass (10.7%) and solar-to-liquid fuels (6.2%) yields, which greatly exceeding natural photosynthetic systems.
On:
May 30, 2016 From:
16h00 To:
17h00
View talk
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Speaker:
Jeff Long (University of California, Berkeley)
Owing to their high surface
areas, tunable pore dimensions, and adjustable surface functionality,
metal-organic frameworks (MOFs) can offer advantages for a variety of gas
storage and gas separation applications.Â
In an effort to help curb greenhouse gas emissions from power plants, we
are developing new MOFs for use as solid adsorbents in post- and pre-combustion
CO2 capture, and for the separation of O2 from air, as
required for oxy-fuel combustion.1Â
In particular, MOFs with open metal cation sites or
diamine-functionalized surfaces are demonstrated to provide high selectivities
and working capacities for the adsorption of CO2 over N2
under dry flue gas conditions.2Â
Multicomponent adsorption measurements further show compounds of the
latter type to be effective in the presence of water,3 while
calorimetry and temperature swing cycling data reveal a low regeneration energy
compared to aqueous amine solutions.4Â MOFs with open metal sites, such as Mg2(dobdc)
(dobdc4– = 2,5-dioxido-1,4- benzenedicarboxylate), are highly
effective in the removal of CO2 under conditions relevant to H2
production, including in the presence of CH4 impurities.5Â Redox-active Fe2+ sites in the
isostructural compound Fe2(dobdc) allow the selective adsorption of
O2 over N2 via an electron transfer mechanism.6Â The same material is demonstrated to be
effective at 45 °C for the fractionation of mixtures of C1 and C2 hydrocarbons,
and for the high-purity separation of ethylene/ethane and propylene/propane
mixtures.7Â Finally, it will
be shown that certain structural features possible within MOFs, but not in
zeolites, can enable the fractionation of hexane isomers according to the
degree of branching or octane number.8
 References
1.    Â
Sumida, K.; Rogow, D. L.; Mason, J. A.; McDonald, T. M.; Bloch, E.
D.; Herm, Z. R.; Bae, T.-H.; Long, J. R. Chem.
Rev. 2012, 112, 724.
2.    Â
McDonald, T. M.; Lee, W. R.; Mason, J. A.; Wiers, B. M.; Hong, C.
S.; Long, J. R. J. Am. Chem. Soc. 2012, 134, 7056.
3.    Â
Mason, J. A.; McDonald, T. M.; Bae, T.-H.; Bachman, J. E.; Sumida,
K.; Dutton, J. J.; Kaye, S. S.; Long, J. R. J.
Am. Chem. Soc. 2015, 137, 4787.
4.    Â
McDonald, T. M.; Mason, J. A.; Kong, X.; Bloch, E. D.; Gygi, D.;
Dani, A.; Crocellà , V.; Giordano, F.; Odoh, S.; Drisdell, W.; Vlaisavljevich, B.;
Dzubak, A. L.; Poloni, R.; Schnell, S. K.; Planas, N.; Kyuho, L.; Pascal, T.;
Prendergast, D.; Neaton, J. B.; Smit, B.; Kortright, J. B.; Gagliardi, L.; Bordiga, S.; Reimer, J. A.;
Long, J. R. Nature 2015, 519, 303.
5.    Â
Herm, Z. R.; Swisher, J. A.;
Smit, B.; Krishna, R.; Long, J. R. J. Am.
Chem. Soc. 2011, 133, 5664.
6.    Â
Bloch, E. D.; Murray, L. J.;
Queen, W. L.; Maximoff, S. N.; Chavan, S.; Bigi, J. P.; Krishna, R.; Peterson,
V. K.; Grandjean, F.; Long, G. J.; Smit, B.; Bordiga, S.; Brown, C. M.; Long,
J. R. J. Am. Chem. Soc. 2011, 133, 14814.
7.    Â
Bloch, E. D.; Queen, W. L.;
Krishna, R.; Zadrozny, J. M.; Brown, C. M.; Long, J. R. Science 2012, 335, 1606.
8.    Â
Herm, Z. R.; Wiers, B. M.; Mason, J. A.; van Baten, J. M.; Hudson,
M. R.; Zajdel, P.; Brown, C. M.; Masciocchi, N.; Krishna, R.; Long, J. R. Science 2013, 340, 960.
On:
November 15, 2016 From:
13h30 To:
14h30
View talk
St Andrews
Speaker:
Prof David MacMillan FRS (Princeton)
New Photoredox Reactions
David W. C. MacMillan
Merck Center for Catalysis, Princeton University,
Princeton, NJ 08544
Abstract. This lecture will discuss the advent and development of new concepts in chemical synthesis, specifically the application of visible light photoredox catalysis to the discovery or invention of new chemical transformations. This lecture will explore a strategy the discovery of chemical reactions using photoredox catalysis. Moreover, we will further describe how mechanistic understanding of these discovered processes has led to the design of new yet fundamental chemical transformations that we hope will be broadly adopted. In particular, a new catalysis activation mode that allows for the development of C–H abstraction and decarboxylative coupling reactions that interface with organometallic catalysis
On:
May 29, 2018 From:
15h30 To:
16h30
View talk
Edinburgh
Speaker:
Prof David MacMillan FRS (Princeton)
New Photoredox
Reactions
David W. C. MacMillan
Merck
Center for Catalysis, Princeton University,
Princeton,
NJ 08544
Abstract. This lecture will discuss the advent and
development of new concepts in chemical synthesis, specifically the application
of visible light photoredox catalysis to the discovery or invention of new
chemical transformations. This lecture
will explore a strategy the discovery of chemical reactions using photoredox
catalysis. Moreover, we will further
describe how mechanistic understanding of these discovered processes has led to
the design of new yet fundamental chemical transformations that we hope will be
broadly adopted. In particular, a new
catalysis activation mode that allows for the development of C–H abstraction
and decarboxylative coupling reactions that interface with organometallic
catalysis.
On:
May 30, 2018 From:
9h00 To:
17h00
View talk
Glasgow
Speaker:
Prof David MacMillan FRS (Princeton)
New Photoredox
Reactions
David W. C. MacMillan
Merck
Center for Catalysis, Princeton University,
Princeton,
NJ 08544
Abstract. This lecture will discuss the advent and
development of new concepts in chemical synthesis, specifically the application
of visible light photoredox catalysis to the discovery or invention of new
chemical transformations. This lecture
will explore a strategy the discovery of chemical reactions using photoredox
catalysis. Moreover, we will further
describe how mechanistic understanding of these discovered processes has led to
the design of new yet fundamental chemical transformations that we hope will be
broadly adopted. In particular, a new
catalysis activation mode that allows for the development of C–H abstraction
and decarboxylative coupling reactions that interface with organometallic
catalysis.
On:
May 31, 2018 From:
16h00 To:
17h00
View talk