Synthesis and Photoreactions of Aromatic Diols Containing Bis (Azo) and Bis (O-Nitrobenzyl) Chromophores

K. Sudheesh Kumar    

Deparment of Chemsitry, Sree Narayana College, Varkala - 695 145 India.

ABSTRACT:

Aromatic diols containing bis (azo) and bis (o-nitrobenzyl) chromophores viz., (4-hydroxyphenylazo)-2,2/-dinitrodiphenylmethane, 4-hydroxy-3-methylphenylazo-4/-hydroxyphenyl-azo-2,2/-dinitrodiphenyl methane and bis (4-hydroxy-3-methylphenylazo)-2-dinitrodiphenyl methane were synthesized from 4,4-diamino-2,2/-dinitrodiphenylmethane and phenol/0-cresol. As a result of photolysis, the azo group of the diols unergo trans-cis isomerisation and one of the o-nitrobenzyl groups of the diols undergo trans-cis isomerisation and one of the o-nitrobenzyl groups in them undergo redox reaction to nitronitrosocarbinol. There occurred a solubility difference between the irradiated and unirradiated diol. In solution, a photoswtiching behaviour was also observed.

KEYWORDS:

Aromatic diols; bis(azo); bis(o-nitrobenyl); photoswtiching; nitronitrosocarbinol

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Copy the following to cite this article: Kumar K. S. Synthesis and Photoreactions of Aromatic Diols Containing Bis (Azo) and Bis (O-Nitrobenzyl) Chromophores. Orient J Chem 2010;26(4).

Copy the following to cite this URL: Kumar K. S. Synthesis and Photoreactions of Aromatic Diols Containing Bis (Azo) and Bis (O-Nitrobenzyl) Chromophores. Orient J Chem 2010;26(4). Available from: http://www.orientjchem.org/?p=23866