Naslov
Substituents impact on the mechanism of photochemical E-Z isomerization of diarylethene triazoles

Autori
Mlakić, Milena ; Mandić, Leo ; Basarić, Nikola ; Mihaljević, Branka ; Pavošević, Fabijan ; Škorić, Irena

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Central European Conference on Photochemistry, EPA Austria / Landgraf, Stephan - Bad Hofgastein, 2022, 1-1

Skup
Central European Conference on Photochemistry (CECP 2022)

Mjesto i datum
Bad Hofgastein, Austrija, 13.02.2022. - 17.02.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
E-Z isomerization, diarylethenes, triazoles, quantum-chemical calculations, LFP, heterostilbenes

Sažetak
Stilbene derivatives have been in the focus of scientific interest over the years as model compounds in the fundamental investigation of their E-Z photoisomerization reaction [1]. In this work, photochemical reactivity in the Z-E isomerization for two heterostilbenes containing 1, 2, 3-triazole unit were investigated theoretically and experimentally by irradiation experiments, fluorescence and laser flash photolysis (LFP) [2]. Fluorescence measurements for ortho-methyl derivative 1 indicated that the Z → E isomerization takes place in an adiabatic reaction on the potential energy surface of the S1 state. On the contrary, the para-nitro derivative 2 undergoes the Z → E isomerization via a triplet excited state, which was detected by LFP. All experimental observations were corroborated by computations. The mechanistic investigation presented gives insight in the fundamental and simple Z → E isomerization and provides new findings which are important in the rational design of different photoreactive diarylethene derivatives used in different fields of science.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA