The photoreversible E reversible arrow Z isomerization of a series of protonated N-benzylideneanilines (X-C6H5CH=NC6H5-Y; X=H, N(CH3)(2); Y=H, NO2) was investigated in concentrated sulphuric acid solution. The UV absorption spectra of the E isomers are practically independent of substituents on benzene rings and suggest a planar conformation for protonated N-benzylideneanilines. The UV spectra of Z isomers were obtained from photostationary state conditions at two wavelengths. Also the quantum yields of E --> Z and Z --> E photoisomerization are not markedly affected by the ring substituents and are compatible with a photoreversible process occurring through a common excited state.

Photochemistry of N-benzylideneanilinium cations in concentrated sulphuric acid solutions / E. Selli. - In: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. A, CHEMISTRY. - ISSN 1010-6030. - 101:2-3(1996), pp. 185-188.

Photochemistry of N-benzylideneanilinium cations in concentrated sulphuric acid solutions

E. Selli
Primo
1996

Abstract

The photoreversible E reversible arrow Z isomerization of a series of protonated N-benzylideneanilines (X-C6H5CH=NC6H5-Y; X=H, N(CH3)(2); Y=H, NO2) was investigated in concentrated sulphuric acid solution. The UV absorption spectra of the E isomers are practically independent of substituents on benzene rings and suggest a planar conformation for protonated N-benzylideneanilines. The UV spectra of Z isomers were obtained from photostationary state conditions at two wavelengths. Also the quantum yields of E --> Z and Z --> E photoisomerization are not markedly affected by the ring substituents and are compatible with a photoreversible process occurring through a common excited state.
E-Z photoisomerization; N-benzylideneanilinium cations; Quantum yields
Settore CHIM/02 - Chimica Fisica
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/190330
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