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

ALP S., ERTEKİN K., Horn M., Icli S.

DYES AND PIGMENTS, cilt.60, sa.2, ss.103-110, 2004 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 60 Sayı: 2
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1016/s0143-7208(03)00143-8
  • Dergi Adı: DYES AND PIGMENTS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.103-110
  • Anahtar Kelimeler: diketopyrrolopyrroles, fluorescence spectroscopy, sol-gel matrix, photostability studies, MAIN-CHAIN, LIQUID-CRYSTALS, PIGMENTS, POLYMERS, UNITS, 2,5-DIHYDROPYRROLO<3,4-C>PYRROLE-1,4-DIONE, DPP, DYE
  • Dokuz Eylül Üniversitesi Adresli: Evet

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)-2,5dihydro-2,5-dimethylpyrrolo[3,4-c]pyrrole-1,4-dione (DPPD-1) and 3,6-bis(4'-butylbiphenyl-4-yl)-2,5-dihydro-2,5dimethylpyrrolo[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. (C) 2003 Elsevier Ltd. All rights reserved.