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    Effect of clay in controlling the non-fluorescence H-dimeric states of a cationic dye Nile Blue Chloride (NBC) in hybrid Langmuir-Blodgett (LB) film

    Year: 2018

    Journal: Chem. Phys. Lett., Volume 691, JAN, page 298–306

    Authors: Debnath, Chandan; Shil, Ashis; Hussain, S. A.; Bhattacharjee, D.

    Organizations: FIST-DST Program Govt. of India [SR/FST/PSI-191/2014]; UGC-NERO, Govt. of India through UGC project [F.5-378/2014-15/MRP/NERO/2235]; DST; CSIR through DST [SE/FTP/PS-54/2007]; CSIR [03(1146)/09/EMR-II]

    Keywords: Nile Blue Chloride (NBC); Isotherms; Langmuir Blodgett (LB) films; BAM images; Spectroscopy

    Present communication reports the effect of amphiphilic matrices and nano-clay platelets on the aggregation properties of a water soluble cationic fluorescent dye Nile Blue Chloride (NBC) in Langmuir-Blodgett (LB) films. In-situ Brewster Angle Microscopic (BAM) studies showed distinct domain structures of complex and hybrid Langmuir monolayer at the air-water interface. UV-vis absorption spectra showed non-fluorescent H-dimeric band in concentrated aqueous solution of NBC and in complex LB film of NBC with stearic acid. By changing various parameters, a great control over H-dimeric states has been achieved in clay incorporated hybrid LB films. These films can act as efficient fluorescence probe. (C) 2017 Elsevier B.V. All rights reserved.
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