Porphyrin Protonation Studied by Magnetic Circular Dichroism

Kód výsledku v IS VaVaI

RIV/61388963:_____/12:00376366 - isvavai.cz

Výsledek na webu

http://dx.doi.org/10.1021/jp2105192

DOI - Digital Object Identifier

10.1021/jp2105192

Jazyk výsledku

angličtina

Název v původním jazyce

Porphyrin Protonation Studied by Magnetic Circular Dichroism

Popis výsledku v původním jazyce

Magnetic circular dichroism (MCD) spectroscopy provides valuable information about electronic excited states : in molecules. The interpretation of spectra is however difficult, often requiring additional theoretical calculations to rationalize the observed signal Recent developments in time dependent density functional theory (TDDFT) bring hope that the applicability of MCD spectroscopy for chemical problems may be significantly extended. In this study, two modern analytical TDDFT implementations are compared and used to understand experimental MCD spectra of a model porphyrin system upon protonation. Changes in porphyrin geometry and electronic structure are related to MCD intensities by comparing the spectra of 5,10,15,20-tetraphenyl-21H;23H-porphyrintetrasulfonic acid (TPPS) measured at different pH values with the TDDFT calculations. Although the theoretical results slightly dependent on the chosen exchange-correlation functional, the computations provided MCD,curves that could wel

Název v anglickém jazyce

Porphyrin Protonation Studied by Magnetic Circular Dichroism

Popis výsledku anglicky

Magnetic circular dichroism (MCD) spectroscopy provides valuable information about electronic excited states : in molecules. The interpretation of spectra is however difficult, often requiring additional theoretical calculations to rationalize the observed signal Recent developments in time dependent density functional theory (TDDFT) bring hope that the applicability of MCD spectroscopy for chemical problems may be significantly extended. In this study, two modern analytical TDDFT implementations are compared and used to understand experimental MCD spectra of a model porphyrin system upon protonation. Changes in porphyrin geometry and electronic structure are related to MCD intensities by comparing the spectra of 5,10,15,20-tetraphenyl-21H;23H-porphyrintetrasulfonic acid (TPPS) measured at different pH values with the TDDFT calculations. Although the theoretical results slightly dependent on the chosen exchange-correlation functional, the computations provided MCD,curves that could wel

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

—

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Physical Chemistry A

ISSN

1089-5639

e-ISSN

—

Svazek periodika

116

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

778-783

Kód UT WoS článku

000298978000083

EID výsledku v databázi Scopus

—