Photostability studies of thermomesomorphic derivatives of 2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione

Küçük Resim Yok

Tarih

2004

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Elsevier BV

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Özet

In this study, the photophysical characteristics, like molar extinction coefficients, Stoke's shifts, quantum yields, radiative and fluorescence lifetimes, fluorescence rate constants, radiationless deactivation rate constants, and singlet energies of the fluorescent mesomorphic diketopyrrolopyrrole derivatives, (DPPDs), 3,6-bis (4-octyloxyphenyl)-2,5-dihydro-2,5-dimethylpyrrolo[3,4-c]pyrrole-1, 4-dione (DPPD-1) and 3,6-bis(4'-butylbiphenyl-4-yl)-2,5-dihydro-2, 5-dimethylpyrrolo[3,4-c]pyrrole-1,4-dione (DPPD-2) have been determined. The photostability studies were carried out under xenon arc lamp, direct and concentrated sunlight in solution of chloroform and tetrahydrofuran as well as in solid state, embedded in matrices of polyvinyl chloride (PVC) and sol-gel. The studies reveal that the photostabilities of the DPPD derivatives in PVC and sol-gel matrices are enhanced compared to solutions of chloroform and tetrahydrofuran. © 2003 Elsevier Ltd. All rights reserved.

Açıklama

Anahtar Kelimeler

Diketopyrrolopyrroles, Fluorescence spectroscopy, Photostability studies, Sol-gel matrix

Kaynak

Dyes and Pigments

WoS Q Değeri

Scopus Q Değeri

Q1

Cilt

60

Sayı

2

Künye