Sen, Sobhan ; Sukul, Dipankar ; Dutta, Partha ; Bhattacharyya, Kankan (2002) Photoisomerization of merocyanine 540 in polymer-surfactant aggregate Proceedings of the Indian Academy of Sciences - Chemical Sciences, 114 (1). pp. 83-91. ISSN 0253-4134
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Official URL: http://ns1.ias.ac.in/chemsci/Pdf-Feb2002/Pc3058.pd...
Related URL: http://dx.doi.org/10.1007/BF02709984
Abstract
Photoisomerization of merocyanine 540 (MC540) in a polymer-surfactant aggregate is studied using picosecond time resolved emission spectroscopy. The aggregate consists of the polymer, poly(vinylpyrrolidone) (PVP) and the surfactant, sodium dodecyl sulphate (SDS). With increase in the concentration of SDS in an aqueous solution of MC540 containing PVP, the emission quantum yield and lifetime of MC540 increase markedly. This indicates marked retardation in the nonradiative photoisomerization process of MC540, when it binds to the polymer-surfactant aggregate. The critical association concentration of SDS for binding to PVP has been found to be 0.5 mM. This is about 16 times lower than the CMC of SDS in pure water (8 mM).
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Indian Academy of Sciences. |
| Keywords: | Dynamics of Photoisomerization; Polymer-surfactant Aggregate |
| ID Code: | 77159 |
| Deposited On: | 10 Jan 2012 07:49 |
| Last Modified: | 18 May 2016 20:32 |
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