The thermochromism of the ET(30) betaine in a micro-heterogeneous medium: a spectral and dynamics simulation study.

Authors :: Aliaga C
Briones L
Rezende MC
Tirapegui C
Source :: Journal of colloid and interface science [J Colloid Interface Sci] 2010 Sep 15; Vol. 349 (2), pp. 565-70. Date of Electronic Publication: 2010 Jun 01.
Publication Year :: 2010
Abstract: A spectral investigation of the thermochromic behavior of Reichardt's E(T)(30) betaine in aqueous solutions of block copolymers ("poloxamers") P407, P237 and P105 was carried out as a function of temperature and concentration. The betaine microenvironment at various stages of the micellization process in these systems was mimicked with the aid of molecular dynamics simulations of model systems. These consisted of the E(T)(30) probe in boxes of water molecules, in the presence of an isolated block copolymer of formula (PEO)(11)-(PPO)(16)-(PEO)(11), and of a micelle formed of 50 of these unimers.<br /> (Copyright 2010 Elsevier Inc. All rights reserved.)

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