Role of solvation dynamics in the kinetics of solvolysis reactions in microreactors

文献信息

发布日期 2009-07-15

DOI 10.1039/B905573H

影响因子 3.676

作者

Pramod Kumar Verma, Abhinanadan Makhal, Rajib Kumar Mitra, Samir Kumar Pal

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摘要

In this contribution we attempt to correlate the dynamical states of water molecules in reverse micelles with a solvolysis reaction in accordance with the activation energy barrier crossing model at the micellar interface. Precise measurement of the different dynamical states of water molecules at the reverse micellar interface with various degrees of hydration is achieved through temperature-dependent solvation dynamics of coumarin 523. The rotational anisotropy studies along with a wobbling-in-cone analysis show that the probe residing at the micellar interface pointing towards the core water experiences less microviscosity at elevated temperature. The consequences of the dynamical freedom of the water at elevated temperature in the solvolysis reaction of benzoyl chloride have also been explored. The accelerated rate of solvolysis has been correlated with the increased solvation dynamics, both of which are associated with a temperature-induced transition of bound to free type water molecules at the micellar interface.

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来源期刊

Physical Chemistry Chemical Physics

CiteScore: 5.5

自引率: 10.3%

年发文量: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.