Time resolved excitation dynamics in emeraldine base

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F15%3A00444776" target="_blank" >RIV/61389013:_____/15:00444776 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.chemphys.2014.12.010" target="_blank" >http://dx.doi.org/10.1016/j.chemphys.2014.12.010</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.chemphys.2014.12.010" target="_blank" >10.1016/j.chemphys.2014.12.010</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Time resolved excitation dynamics in emeraldine base

Popis výsledku v původním jazyce

Using femtosecond pump?probe transient absorption spectroscopy (wavelengths 330?800 nm), we observed and explained excited state, charge transfer and polaron state dynamics in emeraldine base form of polyaniline in dimethyl sulfoxide solution. The excited state created by a pump pulse (700 nm) in the quinoid absorption Q-band loses its initial symmetry by subsequent energy transition to a charge transfer state within 50 fs. The hot charge transfer state either recombines non-radiatively into the groundstate with decay time constant 0.55 ps or transfers into a relaxed state corresponding to the relaxed phenyl geometry during ca 2.1 ps. This relaxed state shows a prolonged lifetime of about 6.5 ps before its recombination to the ground state. However, asmall amount of long-lived polarons with lifetime of about 2 ns in air and with lifetime longer than 6 ns in the solution bubbled with dry N2 was detected.

Název v anglickém jazyce

Time resolved excitation dynamics in emeraldine base

Popis výsledku anglicky

Using femtosecond pump?probe transient absorption spectroscopy (wavelengths 330?800 nm), we observed and explained excited state, charge transfer and polaron state dynamics in emeraldine base form of polyaniline in dimethyl sulfoxide solution. The excited state created by a pump pulse (700 nm) in the quinoid absorption Q-band loses its initial symmetry by subsequent energy transition to a charge transfer state within 50 fs. The hot charge transfer state either recombines non-radiatively into the groundstate with decay time constant 0.55 ps or transfers into a relaxed state corresponding to the relaxed phenyl geometry during ca 2.1 ps. This relaxed state shows a prolonged lifetime of about 6.5 ps before its recombination to the ground state. However, asmall amount of long-lived polarons with lifetime of about 2 ns in air and with lifetime longer than 6 ns in the solution bubbled with dry N2 was detected.

Druh

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

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

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

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Chemical Physics

ISSN

0301-0104

e-ISSN

—

Svazek periodika

456

Číslo periodika v rámci svazku

29 July

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

79-84

Kód UT WoS článku

000356102300014

EID výsledku v databázi Scopus

2-s2.0-84930573559