Micrometer Size Effect on Dye Association in Single Laser-Trapped Water Droplets

Molecular association of malachite green (MG) in single micrometer-sized water droplets dispersed in di-n-butyl phthalate was studied by means of scanning laser manipulation and absorption spectroscopy to elucidate characteristic features of chemical processes at the droplet/oil interface. At a high...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physical chemistry (1952) 1996-02, Vol.100 (5), p.1494-1497
Main Authors: Yao, Hiroshi, Inoue, Yasuhisa, Ikeda, Hiroshi, Nakatani, Kiyoharu, Kim, Haeng-Boo, Kitamura, Noboru
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Molecular association of malachite green (MG) in single micrometer-sized water droplets dispersed in di-n-butyl phthalate was studied by means of scanning laser manipulation and absorption spectroscopy to elucidate characteristic features of chemical processes at the droplet/oil interface. At a high MG concentration, the droplet showed a new absorption band around 580 nm in addition to the monomer band at 615 nm. Analyses of the concentration-dependent absorption spectrum of MG in the droplet indicated that the band at 580 nm could be assigned to that of the MG dimer. The dimer formation of MG in the water droplet was shown to be facilitated with decreasing the droplet diameter, demonstrating the micrometer size effect on dye association. A role of the water/oil interface for the MG dimer formation is discussed.
ISSN:0022-3654
1541-5740
DOI:10.1021/jp952351j