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|Title:||Isolation and characterization of two isomeric arylamine substituted triazinium salts. Studies of intramolecular charge-transfer and electrochromic properties|
|Abstract:||Reaction of 9,10-diaza-4a-azonia-phenanthrene perchlorate ([<b style="">1</b>]ClO<sub>4</sub>) with <i style="">para</i>-toludine in acetonitrile at room temperature affords isomeric triazinium compounds (<i style="">para</i> isomer, [<b style="">2a</b>]ClO<sub>4</sub>, 6-<i style="">p</i>-tolylamino-9,10-diaza-4a-azonia-phenanthrene perchlorate and<sub> </sub><i style="">ortho</i> isomer,<sub> </sub>[<b style="">2b</b>]ClO<sub>4</sub>, 8-<i style="">p</i>-tolylamino-9,10-diaza-4a-azonia-phenanthrene perchlorate) in moderate yields. X-ray structures of the compounds are reported. The isolated compounds have been characterized by different spectroscopic techniques. The compounds belong to the category of ‘donor-acceptor molecules’ and absorb strongly in the visible region. Positioning effect on intramolecular charge transfer process on these isomeric compounds has been investigated. Comparative studies of the spectral, redox and structural properties of the reference isomeric compounds are discussed. Notably the colour of the <i style="">para</i> isomer (red) is distinctly different than that of the <i style="">ortho</i> isomer (blue). These compounds undergo chemically reversible reductions producing azo based free radicals. Electrochromic properties of the compounds are investigated.|
|Appears in Collections:||IJC-A Vol.50A(09-10) [September-October 2011]|
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|IJCA 50A(09-10) 1273-1280.pdf||393.01 kB||Adobe PDF||View/Open|
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