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Article
Hyper-Efficient Quenching of Non-Conjugated Pendant Polymer by Silver Nanoparticles: A Demonstration and Versatile Mechanistic Proposition
Chemical Physics Letters (2012)
  • Debanjana Ghosh, Jadavpur University
  • Nitin Chattopadhyay, Jadavpur University
Abstract
Hyper-efficient quenching of fluorescence of non-conjugated polymer poly(N-vinylcarbazole) by silver nanoparticles is demonstrated. The quenching efficiency increases with an increase in the length of the polymer chain containing the pendant chromophore units. The Stern–Volmer constants (109–1010 mol−1 dm3) are found to be orders of magnitude higher than the normal photochemical quenching processes. Although nanoparticle induced hyper-quenching is reported for conjugated polymers, similar observation in non-conjugated polymers is unprecedented. A versatile mechanism is proposed that rationalizes the hyper-quenching of both conjugated and non-conjugated polymers.
Keywords
  • Quenching,
  • Silver nanoparticles,
  • N-vinylcarbazole
Disciplines
Publication Date
April 12, 2012
DOI
10.1016/j.cplett.2012.02.057
Citation Information
Debanjana Ghosh and Nitin Chattopadhyay. "Hyper-Efficient Quenching of Non-Conjugated Pendant Polymer by Silver Nanoparticles: A Demonstration and Versatile Mechanistic Proposition" Chemical Physics Letters Vol. 532 (2012) p. 52 - 56
Available at: http://works.bepress.com/debanjana-ghosh/5/