The optical properties of various donor or acceptor p-phenyl substituted ethenyl indoles were studied in solvents of varying polarity using absorption, fluorescence and TDDFT methods. Ethenyl indole exhibits non-linear optical properties (NLO) in a substituent dependent manner. Compound with a strong electron-attracting substituent, shows large NLO properties with charge transfer behavior, whereas
Fluorescence and photoisomerization studies ofp-nitrophenyl-substituted ethenylindoles
作者:Anil K. Singh、Prasanta K. Hota
DOI:10.1002/poc.987
日期:2006.1
moment indicate a highly polar excited state for 1–3. Time-resolved fluorescencestudies show that the fluorescence decays are single- and multi-exponential type, depending on the solvent polarity. Further, 1 and 2 do not show photoisomerization on irradiation. However, 3 is photoactive and shows efficient photoisomerization in non-polar heptane. The sensitivity (ρ) of the photoreaction is determined