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: 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::$utf8 is deprecated
Filename: core/Loader.php
Line Number: 925
Backtrace:
File: /home/scotchem/public_html/talks/application/controllers/Talks.php
Line: 108
Function: view
File: /home/scotchem/public_html/talks/index.php
Line: 268
Function: require_once
A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_Loader::$uri 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 |
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Speaker:
Steve Tait (Indiana University Bloomington)
A grand challenge in heterogeneous catalysis is to achieve high levels of selectivity by _x000D_controlling the chemical uniformity of metal catalyst sites at surfaces . Our group is working to _x000D_apply principles of on -surface metal -organic redox assembly to develop a new approach to this _x000D_problem. Metal -organic coor dination networks at surfaces hold promise for selective chemical _x000D_function , but there is a limited understanding of the chemical reactivity of these systems. We _x000D_tested chemical activity of vanadium single -site complexes that are stabilized by tetrazine -bas ed _x000D_ligands. We demonstrate activity toward dioxygen activation and a high degree of selectivity _x000D_compared to vanadium nanoparticles. Reaction with O 2 causes an increase in V oxidation state _x000D_from V II to V IV, resulting in a single strongly bonded V -oxo produc t and spillover of O to the Au _x000D_surface [1] . The metal centers are stabilized in extended, ordered metal -organic complexes that _x000D_self -assemble through an on -surface redox process on the Au( 100) surface and are characterized _x000D_by X -ray photoelectron spectroscopy, scanning tunneling microscopy, high -resolution electron _x000D_energy loss spectroscopy, and density functional theory. New results extend these chemical _x000D_studies to more complex system s that include bimetallic sites and redox isomer systems [2] , _x000D_which will also be highlighted in this presentation. _x000D_We have also developed synthesis schemes to assemble quasi -square planar metal -organic _x000D_complexes on high surface area powdered oxides through a mod ified wet -impregnation -style _x000D_method. X-ray photoelectron spectroscopy measurements demonstrate loading of metal and _x000D_ligand on the surface and synchrotron -based X -ray absorption spectroscopy measurements of the _x000D_coordination shell of the metal centers demons trates single site formation rather than _x000D_nanoparticle assembly [3] . These systems are shown to be active for the catalysis of _x000D_hydrosilylation reactions at a level that is competitive with current homogeneous catalysts.
On:
December 10, 2018 From:
14h00 To:
15h00
View talk
St Andrews
Speaker:
Olof Johansson (Edinburgh)
The information on this talk is not live. For up-to-date details please visit: https://talks.st-andrews.ac.uk/
On:
December 13, 2018 From:
15h30 To:
16h30
View talk
St Andrews
Speaker:
Mathew Horocks (Edinburgh)
test
On:
January 30, 2019 From:
14h00 To:
15h00
View talk
St Andrews
Speaker:
Denis Jacquemin (Nantes)
Using ab initio approaches to model, predict and understand the optical properties of organic and inorganic dyes Denis Jacquemin Laboratoire CEISAM, UMR CNRS n°6230, Université de Nantes, 2, rue de la Houssinière, 44322 Nantes, Cedex 3, France. Denis.Jacquemin@univ -nantes.fr During this lecture, I will illustrate some of the successes and failures of Time-Dependent Density Functional Theory (TD -DFT) in simulating the properties of electronically excited -states, with a specific interest on structures of interest for dye chemistry. 1-2 Notably, I will discuss the importance of calculating vibronic effects to obtain accurate comparisons with experimental data, including 0 -0 energies and band shapes, and illustrate this aspect with several examples. 3 I will also present examples of applications of TD -DFT to real-life structures used in LEDs focussing on two examples: ESIPT -based organic dyes for white OLEDs 4 and inorganic complexes used in blue/green/red phosphors. 5 1 D. Jacquemin, C. Adamo, Chem. Soc. Rev., 2013, 42, 845 . 2 D. Jacquemin, C. Adamo, Top. Curr. Chem.. , 2016 , 368 , 345 . 3 F. Santoro, D. Jacquemin, Wires. Comput. Mol. Sci. 2016, 6, 460. 4 A. Steffen, K. Costuas, A. Bouccekkine, M. H. Thibault, A. Beeby, A. S. Batsanov, D. Jacquemin, A. Charaf -Eddin, J. F. Halet, T. D. Marder Inorg. Chem. , 2014 , 53 , 7055 . 5 E. Heyer, K. Benelhadj, S. Budzak, D. Jacquemin, J. Massue, G. Ulrich Chem. Eur. J ., 2017, 23, 7324 . 6 D W . Zhang, D. Jacquemin, Q. Peng, Z. Suhai, D. Escudero, J. Phys. Chem. C, 2018 , 122 , 6340 .
On:
February 6, 2019 From:
14h00 To:
15h00
View talk
St Andrews
Speaker:
Greg Scholes (Princeton)
Probing Ultrafast Chemical Dynamics Inspired by the Rhythms of Fireflies Coherence phenomena arise from interference, or the addition, of wave -like amplitudes in phase [1] . While coherence has been shown to yield transformative new ways for improving function, advances have been limited to pristine matter, as quantum coherence is considered fragile. Here I will discuss how vibrational an d vibronic wavepackets entrain ensembles of molecules, like the synchronized flashing of fireflies . I will discuss how this can be used to probe mechanisms of ultrafast dynamics and how in -step vibrational motion might be employed to control function on ul trafast timescales. I will give examples that include light -harvesting in photosynthesis, energy flow in organometallic molecules that is ‘wired’ by Fermi resonance, and ultrafast electron transfer in molecular systems. [1] Scholes, et al. “Optimal Coherence in Chemical and Biophysical Dynamics” Nature 543, 647 – 656 (2017) .
On:
February 11, 2019 From:
13h00 To:
14h00
View talk
St Andrews
Speaker:
Deborah Kays (Nottingham)
Small molecule activation and catalysis using earth abundant metal complex
On:
February 13, 2019 From:
14h00 To:
15h00
View talk