J 2021

Ultrafast excited state dynamics, direct and back [2+2]-cross-photocy-cloaddition of a styryl dye-stilbene charge transfer complex

VOLCHKOV, Valery V.; Timofey P. MARTYANOV; Mikhail N. KHIMICH; Mikhail V. RUSALOV; Daria NEZNAEVA et al.

Základní údaje

Originální název

Ultrafast excited state dynamics, direct and back [2+2]-cross-photocy-cloaddition of a styryl dye-stilbene charge transfer complex

Autoři

VOLCHKOV, Valery V.; Timofey P. MARTYANOV; Mikhail N. KHIMICH; Mikhail V. RUSALOV; Daria NEZNAEVA; Fedor E. GOSTEV; Ivan V. SHELAEV; Victor A. NADTOCHENKO; Mikhail Ya MELNIKOV; Anna A. MOISEEVA; Evgeny N. USHAKOV a Sergey P. GROMOV

Vydání

Dyes and Pigments, Oxford, Elsevier, 2021, 0143-7208

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10406 Analytical chemistry

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

Impakt faktor

Impact factor: 5.122

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/21:00120962

Organizační jednotka

Přírodovědecká fakulta

EID Scopus

Klíčová slova anglicky

Styryl dyes; E-Z photoisomerization; [2+2] photocycloaddition; Cyclobutanes; Bis-crown ethers; Intrasupramolecular photo-driven electron transfer

Štítky

Příznaky

Mezinárodní význam, Recenzováno
Změněno: 13. 1. 2021 15:19, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

This research is dedicated to the study of bis(ammoniopropyl) derivative of (E)-4-(4-mercaptostyryl)pyridine dye (2), forming a highly stable bimolecular complex with a bis(18-crown-6 ether) derivative of (E)-stilbene (1) in solution owing to ditopic coordination via hydrogen bonds. The spectral-kinetic parameters of E isomer of the dye and its complex were obtained using steady-state absorption, fluorescence, and time-resolved absorption spectroscopy. The stability constant of the complex, quantum yields of cross-PCA and retro-PCA reactions were determined by spectrophotometric titration methods. According to density functional theory calculations, E-Z photoisomerization of dye 2 occurs via non-radiative deactivation from intermediate twisted (TICT) state. The detailed study of stereospecific [2 + 2]-cross-photocycloaddition (cross-PCA) of complex (E)-1.(E)-2 and back reaction of cross-PCA product (rctt-3) was carried out. The complexation reaction of cyclobutane rctt-3 with Ba2+ ions has been investigated. A highly efficient direct intrasupramolecular photoelectron transfer and the back electron transfer of a moderate efficiency were found for the complex (E)-1.(E)-2.