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PAUK, K. LUŇÁK, S. RŮŽIČKA, A. MARKOVÁ, A. TEICHMANOVÁ, K. MAUSOVÁ, A. KRATOCHVÍL, M. SMOLKA, R. MIKYSEK, T. WEITER, M. IMRAMOVSKÝ, A. VALA, M.
Original Title
Colour-tuneable solid-state fluorescence of crystalline powders formed from push-pull substituted 2,5-diphenyl-stilbenes
Type
journal article in Web of Science
Language
English
Original Abstract
The solid-state fluorescence (SSF) of eight DPA-DPS-EWG derivatives (DPA = diphenylamino, DPS = 2,5-diphenyl-stilbene building block, EWG = electron withdrawing group) was studied. Varying the strength of the EWG enabled the tuning of the LUMO energy within a range broader than 1 eV, while the simultaneous changes of HOMO energy were less than 0.1 eV, according to cyclic voltammetry. The fluorescence maxima in dichloromethane laid between 483 and 752 nm and exhibited monoexponential decay and a photoluminescence quantum yield (PLQY) always higher than 35%. Six derivatives with a SSF PLQY higher than 10% in polycrystalline powder form continuously covered the range from 475 to 733 nm. Three components of SSF multiexponential decay, obtained by time-resolved fluorescence spectroscopy, were ascribed to exciton migration to nonfluorescent traps, and monomer-like and aggregate fluorescence. The character of the emitting aggregates was evaluated by quantum chemical modelling based on time-dependent density functional theory computations, carried out on the dimer arrangements obtained by X-ray diffractometry of the single crystals.
Keywords
organic dyes, diphenyl-stilbene, solid state fluorescence, NIR fluorescence
Authors
PAUK, K.; LUŇÁK, S.; RŮŽIČKA, A.; MARKOVÁ, A.; TEICHMANOVÁ, K.; MAUSOVÁ, A.; KRATOCHVÍL, M.; SMOLKA, R.; MIKYSEK, T.; WEITER, M.; IMRAMOVSKÝ, A.; VALA, M.
Released
8. 12. 2022
Publisher
ROYAL SOC CHEMISTRY
Location
CAMBRIDGE
ISBN
2046-2069
Periodical
RSC Advances
Year of study
54
Number
December
State
United Kingdom of Great Britain and Northern Ireland
Pages from
34797
Pages to
34807
Pages count
11
URL
https://pubs.rsc.org/en/content/articlepdf/2022/ra/d2ra05593g
BibTex
@article{BUT181372, author="PAUK, K. and LUŇÁK, S. and RŮŽIČKA, A. and MARKOVÁ, A. and TEICHMANOVÁ, K. and MAUSOVÁ, A. and KRATOCHVÍL, M. and SMOLKA, R. and MIKYSEK, T. and WEITER, M. and IMRAMOVSKÝ, A. and VALA, M.", title="Colour-tuneable solid-state fluorescence of crystalline powders formed from push-pull substituted 2,5-diphenyl-stilbenes", journal="RSC Advances", year="2022", volume="54", number="December", pages="34797--34807", doi="10.1039/d2ra05593g", issn="2046-2069", url="https://pubs.rsc.org/en/content/articlepdf/2022/ra/d2ra05593g" }