Modified aggregation pattern of cresyl violet acetate adsorbed on nano clay mineral layers in Langmuir Blodgett film

被引：8

作者：

Banik, Soma ^{[1
,2
]}

Hussain, S. A. ^{[1
]}

Bhattacharjee, D. ^{[1
]}

机构：

[1] Tripura Univ, Dept Phys, Thin Film & Nanosci Lab, Suryamaninagar 799022, Tripura, India

[2] Womens Coll, Dept Phys, Agartala 799001, Tripura, India

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2018年 / 353卷

关键词：

Aggregation; Adsorption; Clay mineral layers; Hybrid film; Fluorescence; SIZE-MATCHING RULE; OXAZINE DYES; 2ND-HARMONIC GENERATION; ENERGY-TRANSFER; INTERCALATION; ORIENTATION; SPECTRA; NANOCOMPOSITES; SPECTROSCOPY; ABSORPTION;

D O I：

10.1016/j.jphotochem.2017.12.013

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Present work investigated the modified aggregation behavior of a cationic oxazine dye, Cresyl violet acetate (CVA) in presence of Laponite nano clay mineral layers in aqueous clay mineral dispersion as well as in ultra thin organo-clay hybrid Langmuir Blodgett (LB) films. The presence of non-fluorescent H-dimeric sites in aqueous solution of CVA even at very low concentration diminishes its fluorescence intensity and CVA ceases to emit any fluorescence in solid state and in the ultrathin films due to the abundance of H-dimeric sites. Incorporation of clay in aqueous solution drastically modified the absorption spectrum of CVA. Organo-clay hybrid film of CVA, fabricated at higher clay concentration, showed intense J-aggregated band due to the formation of J-aggregated species. UV-vis absorption and fluorescence spectroscopy as well as in-situ Brewster angle microscopic (BAM) studies were employed in this investigation. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：570 / 580

页数：11

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