Photocyclization reaction of a diarylmaleimide derivative in polar solvents.

Chem Commun (Camb)

Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan.

Published: July 2008

Photochromism of a symmetric diarylmaleimide derivative, having two thiophene rings (1), and a non-symmetric derivative having a S,S-dioxide thiophene ring and a thiophene ring (2) as the aryl moieties, was studied in various solvents. The photocyclization quantum yield of gradually decreased with increasing the solvent polarity and the reaction was not observed in polar solvents, such as ethanol and acetonitrile; on the other hand, such a strong solvent dependence of the photocyclization reaction was not observed for ; the different behavior is attributed to the weaker electron donating ability of the S,S-dioxide thiophene ring.

Download full-text PDF

Source
http://dx.doi.org/10.1039/b802780cDOI Listing

Publication Analysis

Top Keywords

thiophene ring
12
photocyclization reaction
8
diarylmaleimide derivative
8
polar solvents
8
ss-dioxide thiophene
8
reaction observed
8
reaction diarylmaleimide
4
derivative polar
4
solvents photochromism
4
photochromism symmetric
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!