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Diiminic Schiff Bases: An Intriguing Class of Compounds for a Copper‐Nanoparticle‐Induced Fluorescence Study
Author(s) -
Ganguly Mainak,
Pal Anjali,
Negishi Yuichi,
Pal Tarasankar
Publication year - 2012
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201201242
Subject(s) - salicylaldehyde , copper , fluorescence , photochemistry , nanoparticle , quenching (fluorescence) , chemistry , schiff base , condensation , irradiation , polymer chemistry , nuclear chemistry , materials science , nanotechnology , organic chemistry , optics , physics , nuclear physics , thermodynamics
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.