Role of solvation dynamics in the kinetics of solvolysis reactions in microreactors.
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.
Unit for Nano Science & Technology, Department of Chemical, Biological & Macromolecular Sciences, S. N. Bose National Center for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700098, India.
Pramod Kumar
PK
Verma
Abhinanadan
A
Makhal
Rajib Kumar
RK
Mitra
Samir Kumar
SK
Pal
D001565:Benzoates / Q000737:chemistry; D003374:Coumarins / Q000737:chemistry*; D007700:Kinetics; D008823:Micelles; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation / Q000379:methods; D012995:Solubility; D013056:Spectrophotometry, Ultraviolet; D013696:Temperature; D013816:Thermodynamics; D014867:Water / Q000737:chemistry
D001565:Benzoates; D003374:Coumarins; D008823:Micelles; D014867:Water; C013409:benzoyl chloride