Photophysics of Benzoxazole and Dicyano Functionalised Diketopyrrolopyrrole Derivatives: Insights into Ultrafast Processes and the Triplet State

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28778758%3A_____%2F24%3AN0000007" target="_blank" >RIV/28778758:_____/24:N0000007 - isvavai.cz</a>

Alternative codes found

RIV/61389013:_____/24:00587477 RIV/00216208:11320/24:10493930

Result on the web

<a href="https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/cphc.202300872" target="_blank" >https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/cphc.202300872</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/cphc.202300872" target="_blank" >10.1002/cphc.202300872</a>

Result language

angličtina

Original language name

Photophysics of Benzoxazole and Dicyano Functionalised Diketopyrrolopyrrole Derivatives: Insights into Ultrafast Processes and the Triplet State

Original language description

Diketopyrrolopyrrole (DPP) functionalised with an electron donating unit acts as a donor-acceptor molecules that have shown potential for application in dyes and photovoltaics. These molecules offer broad absorption/emission properties and structure-dependent dynamics. In this study, we used femtosecond pump-probe spectroscopy to investigate the photo-initiated dynamics of thiophene linked DPP derivatives. The thio-DPPs are functionalised by electrons withdrawing terminal groups, benzoxazole and thiophene dicyanide. The benzoxazole derivative is strongly emissive and directly relaxes directly to the ground state chloroform solution. Thiophene dicyanide derivative exhibits distinct spectral evolution in the first 10 ps, associated with structural and vibronic process. Later, it crosses over to the triplet state with a yield of 20%. In the solid-state thin film, we observed a signal that resembles singlet fission. Analysis of temperature-dependent steady state absorbance spectra show that these features are due to laser-induced thermal artifacts. We describe a simplified excited state evolution in the thin film that does not include any additional excited states. These findings have significant implications for the analysis of triplet formation, which plays a major role in the photophysics of many organic materials.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10403 - Physical chemistry

Project

<a href="/en/project/GA22-02005S" target="_blank" >GA22-02005S: Exciton transformation in supramolecular polymers for energy conversion</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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

Name of the periodical

ChemPhysChem

ISSN

1439-4235

e-ISSN

1439-7641

Volume of the periodical

25

Issue of the periodical within the volume

13

Country of publishing house

DE - GERMANY

Number of pages

10

Pages from-to

e202300872

UT code for WoS article

001214248400001

EID of the result in the Scopus database

2-s2.0-85192051689