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Effect of ligand on the redox reactions of thallium metal clusters

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Abstract

Pulse radiolysis of an aqueous solution of mono-valent thallium ion and mixed solutions of Tl+/Ag+ in the presence of various amino polycarboxylic acids such as trans-1,2-diaminocyclohexane-N,N,N′,N′-tetraacetic acid (DCTA), diethylenetriaminepentaacetic acid (DTPA), N-(2-hydroxyethyl)ethylenediaminetriacetic acid (HEDTA) and triethylenetetraminehexaacetic acid (TTHA) has been carried out. Abnormal valence states of Tl ions were generated. It is concluded that DCTA, DTPA, HEDTA and TTHA decrease the redox potential of Tl ions in aqueous solutions. It was observed that the electron transfer from complexed Tl +2 to Ag+ varied in the range 7.5 × 108 to 1.0 × 109, depending on the type of complexing ligand. Electron transfer from Tl +2 to Ag+ lead to the formation of silver atoms, which agglomerate further to form silver colloid.

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Acknowledgements

The authors would like to thank Dr. S. K. Sarkar, Head of the RPCD, for his encouragement. The authors also thank Smt. Madhu Toley, Shri Sunil Shinde and Shri. S. A. Nadkarni for their help in carrying out the pulse radiolysis experiments.

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Authors and Affiliations

  1. Radiation and Photochemistry Division (RPCD), Bhabha Atomic Research Centre, Mumbai, 400 085, India

    Anjana Sarkar, Tulsi Mukherjee & Sudhir Kapoor

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  1. Anjana Sarkar
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  2. Tulsi Mukherjee
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  3. Sudhir Kapoor
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Correspondence to Sudhir Kapoor.

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Sarkar, A., Mukherjee, T. & Kapoor, S. Effect of ligand on the redox reactions of thallium metal clusters. Res Chem Intermed 35, 79–89 (2009). https://doi.org/10.1007/s11164-008-0002-8

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  • DOI: https://doi.org/10.1007/s11164-008-0002-8

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