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Diiminic Schiff Bases: An Intriguing Class of Compounds for a Copper-Nanoparticle-Induced Fluorescence Study

  1. Mainak Ganguly1,
  2. Dr. Anjali Pal2,
  3. Dr. Yuichi Negishi3,
  4. Prof. Tarasankar Pal1,*

Article first published online: 12 OCT 2012

DOI: 10.1002/chem.201201242

Issue

Chemistry - A European Journal

Chemistry - A European Journal

Volume 18, Issue 49, pages 15845–15855, December 3, 2012

Additional Information

How to Cite

Ganguly, M., Pal, A., Negishi, Y. and Pal, T. (2012), Diiminic Schiff Bases: An Intriguing Class of Compounds for a Copper-Nanoparticle-Induced Fluorescence Study. Chem. Eur. J., 18: 15845–15855. doi: 10.1002/chem.201201242

Author Information

  1. 1

    Department of Chemistry, Indian Institute of Technology, Kharagpur, Kharagpur-721302, West Bengal (India), Fax: (+91) 03222-282252

  2. 2

    Department of Civil Engineering, Indian Institute of Technology, Kharagpur, Kharagpur-721302, West Bengal (India)

  3. 3

    Department of Applied Chemistry, Tokyo University of Science, Tokyo-1628601 (Japan)

*Department of Chemistry, Indian Institute of Technology, Kharagpur, Kharagpur-721302, West Bengal (India), Fax: (+91) 03222-282252

Publication History

  1. Issue published online: 23 NOV 2012
  2. Article first published online: 12 OCT 2012
  3. Manuscript Revised: 15 AUG 2012
  4. Manuscript Received: 12 APR 2012

Funded by

  • UGC
  • DST
  • NST
  • BRNS
  • CSIR, New Delhi, India
  • IIT Kharagpur

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Keywords:

  • copper;
  • diimines;
  • fluorescence;
  • nanoparticles;
  • Schiff bases

Abstract

The condensation products of salicylaldehyde and different diamines constitute an important class of diiminic Schiff bases (DSBs). This class of compounds has been rediscovered as reducing as well as capping agents under UV irradiation. UV irradiation of alkaline DSB solutions in the presence of water-soluble copper salts has been employed to produce copper nanoparticles (CuNPs). Intriguing CuNP-stimulated fluorescence behavior of the solution has been observed. Depending upon the nature of the spacer in between two iminic bonds, fluorescence enhancement or quenching is observed. Such surprising fluorescence contrast has been ascribed to far-field radiation and lossy surface waves.

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