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http://nopr.niscpr.res.in/handle/123456789/25067| Title: | Comparative absorption spectroscopy involving 4f-4f transitions to explore kinetics of complexation of Zn(II) with Er(III)-glutathione complex & compositional dependence of intensity parameters |
| Authors: | Gagnani, Minaz A Shukla, Ram S Hari, Shreekala K Misra, Sudhindra N |
| Keywords: | Kinetics of complexation;Complexation reaction;Spectroscopy of complexation;Lanthanide;UV/ IS;NMR;IR |
| Issue Date: | May-2003 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The kinetic and spectroscopic investigations on complexation of Zn(II) with Er2(GSH)2(H2O)4 I (GSH = reduced glutathione) to form Er2(GSH)2 Zn(H2O)6 complex 2 have been performed at 30°C by following Five, 4f-4f sensitive transitions of lanthanide Er(III), 4I15/ 2 → 4G11/2 , 4I15/ 2 → 4F17/2 , 4I15/ 2 → 2H11/2 , 4I15/ 2 → 4F7/2 , 4I15/ 2 → 2H11/2 , 4I15/ 2 → 4F9/2and 4I15/ 2 → 4I11/ 2 in water as well as in equimolar mixture of DMF and water. Performances of all the five bands were found to be competently sensitive, on the basis of kinetic studies done by following the changes in the intensity (absorbance, molar absorptivity) and intensity parameters (oscillator strength P and Judd-Ofelt Tλ intensity). Kinetics showed first order dependence in terms of concentration s of Zn(II) and complex 1 on the rate of formation of complex 2. In order to support the kinetic and spectroscopic observations, complex 1 and 2 were synthesized also, and were characterized by C, H, N, S, and elemental analysis: UV /V IS, NMR and IR techniques. Kinetic, mechanistic and spectroscopic aspects of the complexation reaction are presented and discussed. |
| Page(s): | 374-383 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Appears in Collections: | IJPAP Vol.41(05) [May 2003] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJPAP 41(5) 374-383.pdf | 2.03 MB | Adobe PDF | View/Open |
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