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8098639 
Journal Article 
Photoreactivity of donor - Acceptor ethenes 
Singh, AK; Hota, PK 
2003 
1 
Indian Journal of Chemistry. Section B
ISSN: 0376-4699
EISSN: 0975-0983 
42 
9 
2048-2053 
English 
While 3-(4-nitrophenyl ethenyl-E)-N-H indole is photochemically stable, and shows dramatically red-shifted solvatochromic fluorescence emission (λem 642 nm with λex 405 nm in acetonitrile), the corresponding p-aminophenyl derivative, 3-(4-amino phenyl ethenyl-E)-N-H indole undergoes photocyclodehydrogenation yielding a benzocarbazole photoproduct together with a moderately red-shifted fluorescence emission (λem 404/414 nm with λex 323 nm in acetonitrile).