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<p><strong>Photochromism of Copper(I) and Silver (I) complexes of 1-alkyl-2-(arylazo)imidazoles in miceller media</strong></p>

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Title Statement <p><strong>Photochromism of Copper(I) and Silver (I) complexes of 1-alkyl-2-(arylazo)imidazoles in miceller media</strong></p>
 
Added Entry - Uncontrolled Name SINHA, CHITTARANJAN ; Professor
UGC and CSIR (New Delhi, India) respectively for financial support under minor research programme (PSW-158/13-14) from the UGC, New Delhi and the Council of Scientific and Industrial Research (CSIR, Sanction No. 01(2894)/17/EMR-II) New Delhi, India
 
Uncontrolled Index Term Coordination Chemistry
1-Alkyl-2-(arylazo)imidazoles; Cu(I) and Ag(I) complexes; photoisomerisation; effects of micelle.
 
Summary, etc. <p>Photochromism, a reversible structural change of distinctive absorption feature of each isomer upon irradiation of light, is largely influenced by external environment such as polarity of media, existence of noncovalent interactions, hydrogen bonding etc. In this work, the Photochromism of [Cu(RaaiR<sup>/</sup>)<sub>2</sub>]ClO<sub>4 </sub>and [Ag(RaaiR<sup>/</sup>)<sub>2</sub>]NO<sub>3</sub> complexes (RaaiR<sup>/</sup> = 1-alkyl-2-(arylazo)imidazole) have been examined in the micelle media in MeOH using Triton-X-100, CTAB and SDS. 1-Alkyl-2-(arylazo)imidazole undergoes <em>trans-</em>to<em>-cis</em> isomerization about –N=N- bond upon light irradiation. The quantum yield (f<sub>t</sub><sub>®c</sub>) of the photoisomerization follows the sequence nonionic micelle (Triton-X-100) &gt; Cationic micelle (CTAB) &gt;  no micelle &gt; anioic  micelle (SDS). Although the <em>cis</em>-to-<em>trans</em> isomerization is also carried out photochemically but thermal process is faster and is followed. The activation energy (E<sub>a</sub>) of <em>cis</em>-to-<em>trans</em> isomerization is calculated by controlled temperature (298 – 313 K) experiment. Triton-X-100 and CTAB amplify the activation energy (E<sub>a</sub>) of <em>cis</em> ® <em>trans</em> thermal isomerization while in presence of SDS it is decreased.</p>
 
Publication, Distribution, Etc. Indian Journal of Chemistry -Section A (IJCA)
2020-10-05 12:32:52
 
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http://op.niscair.res.in/index.php/IJCA/article/view/23388
 
Data Source Entry Indian Journal of Chemistry -Section A (IJCA); ##issue.vol## 59, ##issue.no## 2 (2020): INDIAN JOURNAL OF CHEMISTRY- SECTION A
 
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Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJCA/article/download/23388/465473190
http://op.niscair.res.in/index.php/IJCA/article/download/23388/465473236
 
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