In this work, we have addressed the problem of "acidit" of the water-pool of a reverse micelle (RM) through the well-known inversion of sucrose reaction as a tool of investigation. This reaction has been performed inside positively and negatively charged RM and the rates are compared with that in bulk water. We propose that the buffer-like action in a water-pool is much stronger than expected earlier. The rate of sucrose hydrolysis slowed down in the negatively charged AOT reverse micelle while it sped up for the positively charged CTAB reverse micelle. However, temperature-dependent measurements showed that the activation energy remained the same for all the cases. It has been concluded that a proton gradient exists inside the water-pool of the reverse micelle and it determines the buffer-like action of the water-pool that persists until about 2 N of HCl in AOT RM of w0 = 10.5.
|Number of pages||7|
|State||Published - Feb 23 2016|
Bibliographical noteFunding Information:
P.M. and R.Y. thank the University Grants Commission (UGC) and S.G. and S.R. thank the Council of Scientific and Industrial Research (CSIR) for awarding fellowships. J.R. thanks the Indian Academy of Science (IAS) for the awarding summer project fellowship. The authors thank Dr. Saptarshi Mukherjee and Mr. Nirmal Das of the Indian Institute of Science Education and Research, Bhopal, India for DLS experiments. This work is financially supported by SERB, Government of India (Project No. SR/S1/PC-08/2011).
© 2016 American Chemical Society.
ASJC Scopus subject areas
- Materials Science (all)
- Condensed Matter Physics
- Surfaces and Interfaces