• KALLOL MUKHERJEE

      Articles written in Journal of Chemical Sciences

    • Are water-xylitol mixtures heterogeneous? An investigation employing composition and temperature dependent dielectric relaxation and time-resolved fluorescence measurements

      EJAJ TARIF KALLOL MUKHERJEE ANJAN BARMAN RANJIT BISWAS

      More Details Abstract Fulltext PDF

      Aqueous xylitol solutions at six different concentrations were studied employing dielectric relaxation (DR) and time-resolved fluorescence (TRF) measurements in the temperature range 295–323 K. The focus was to explore the solution heterogeneity aspect via monitoring the viscosity coupling of the average relaxation rates at various temperatures. TRF measurements were done using both hydrophobic and hydrophilic probes to explore the preferences, if any, for solute locations in these binary mixtures. Energy-selective population excitations and the corresponding fluorescence emissions did not suggest any significant spatial heterogeneity in solution structure within the lifetimes of these probes. DRmeasurements and TRF experiments indicated mild deviations from the hydrodynamic viscosity dependence of themeasured relaxation rates. All these suggestmild spatiotemporal heterogeneity for these water-xylitol mixtures in the temperature range considered. In addition, DRtimescales appear to originate from reorientational and H-bond relaxation dynamics, excluding the possibilityof full molecular rotations

  • Journal of Chemical Sciences | News

© 2021-2022 Indian Academy of Sciences, Bengaluru.