PRATIK SEN
Articles written in Journal of Chemical Sciences
Volume 119 Issue 2 March 2007 pp 71-76
Excited-state proton transfer from pyranine to acetate in methanol
Sudip Kumar Mondal Subhadip Ghosh Kalyanasis Sahu Pratik Sen Kankan Bhattacharyya
Excited-state proton transfer (ESPT) of pyranine (8-hydroxypyrene-1,3,6-trisulphonate, HPTS) to acetate in methanol has been studied by steady-state and time-resolved fluorescence spectroscopy. The rate constant of direct proton transfer from pyranine to acetate ($k_1$) is calculated to be $\sim 1 \times 10^9$ M-1 s-1. This is slower by about two orders of magnitude than that in bulk water ($8 \times 10^{10}$ M-1 s-1) at 4 M acetate.
Volume 133 All articles Published: 19 February 2021 Article ID 0025
NAVIN SUBBA PUSHPKANT SAHU NILIMESH DAS PRATIK SEN
Deep eutectic solvents (DESs) have emerged as a new kind of solvent and an excellent alternative to ionic liquids, thanks to its simplicity in preparing and availability of a large number of potential constituents to tune the properties. However, most of the reported DESs are ionic, and to the best of ourknowledge, only a few non-ionic DESs are available, which are liquid at room temperature. Here, we rationally design and report a new ternary non-ionic DES comprising of acetamide, urea, and sorbitol, which is liquid at room temperature. We also report some of the important physical properties like refractive index(nD), sound velocity (u), density (r), and dynamic viscosity (h).
Volume 134, 2022
All articles
Continuous Article Publishing mode
Click here for Editorial Note on CAP Mode
© 2021-2022 Indian Academy of Sciences, Bengaluru.