Highly efficient intrinsic phosphorescence from a sigma?conjugated poly(silylene) polymer

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23220%2F14%3A43924172" target="_blank" >RIV/49777513:23220/14:43924172 - isvavai.cz</a>

Výsledek na webu

<a href="http://10.1021/jp506959m" target="_blank" >http://10.1021/jp506959m</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/jp506959m" target="_blank" >10.1021/jp506959m</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Highly efficient intrinsic phosphorescence from a sigma?conjugated poly(silylene) polymer

Popis výsledku v původním jazyce

We have observed highly efficient intrinsic phosphorescence of a neat sigma-conjugated polymer, poly(biphenyl-4-ylmethylsilylene) (PBMSi). At low temperatures, PBMSi solid films featured ?15% phosphorescence quantum yield, which is unusually high for purely organic conjugated polymers and is comparable to that of organometallic polymers. Exciton dynamics in PBMSi was studied by ultrafast fluorescence and time-gated delayed emission measurements. It was shown that the phosphorescence of PBMSi originatesfrom the radiative decay of triplets on the pí-conjugated biphenyl group constituting the lowest triplet state, T1, which is populated under the excitation of the sigma-conjugated polymer backbone, i.e., with energy well below the lowest singlet excitedstate of the biphenyl group itself. The nature of the excited states in PBMSi was further investigated by performing quantum-mechanical calculations of the model compound. The calculations showed that the lowest singlet excited state has

Název v anglickém jazyce

Highly efficient intrinsic phosphorescence from a sigma?conjugated poly(silylene) polymer

Popis výsledku anglicky

We have observed highly efficient intrinsic phosphorescence of a neat sigma-conjugated polymer, poly(biphenyl-4-ylmethylsilylene) (PBMSi). At low temperatures, PBMSi solid films featured ?15% phosphorescence quantum yield, which is unusually high for purely organic conjugated polymers and is comparable to that of organometallic polymers. Exciton dynamics in PBMSi was studied by ultrafast fluorescence and time-gated delayed emission measurements. It was shown that the phosphorescence of PBMSi originatesfrom the radiative decay of triplets on the pí-conjugated biphenyl group constituting the lowest triplet state, T1, which is populated under the excitation of the sigma-conjugated polymer backbone, i.e., with energy well below the lowest singlet excitedstate of the biphenyl group itself. The nature of the excited states in PBMSi was further investigated by performing quantum-mechanical calculations of the model compound. The calculations showed that the lowest singlet excited state has

Druh

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

CEP obor

JA - Elektronika a optoelektronika, elektrotechnika

OECD FORD obor

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Projekt

<a href="/cs/project/ED2.1.00%2F03.0094" target="_blank" >ED2.1.00/03.0094: Regionální inovační centrum elektrotechniky (RICE)</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

The Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

—

Svazek periodika

118

Číslo periodika v rámci svazku

40

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

22923-22934

Kód UT WoS článku

000343016800012

EID výsledku v databázi Scopus

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