Kinetics and Solvent-Dependent Thermodynamics of Water Capture by a Fullerene-Based Hydrophobic Nanocavity
Citations Over TimeTop 20% of 2011 papers
Abstract
Kinetic and thermodynamic properties of water encapsulation from organic solution by an open-cage [60]fullerene derivative have been investigated. 2D exchange NMR spectroscopy (EXSY) measurements were employed to determine the association and dissociation constants at 300-330 K (k(a) = 4.3 M(-1) × s(-1) and k(d) = 0.42 s(-1) at 300 K) in 1,1,2,2-tetrachloroethane-d(2) as well as the activation energies (E(a,ass) = 27 kJ mol(-1), E(a,diss) = 50 kJ mol(-1)). The equilibrium constants and thermodynamic parameters in various solvents (benzene-d(6), 1,2-dichlorobenzene-d(4), and dimethylsulfoxide-d(6)) were estimated using 1D-(1)H NMR spectroscopy. The parameters were dependent on the polarity of the solvent; ΔH depended linearly on the solvent polarity, becoming increasingly unfavorable as polarity increased. Mixtures of polar dimethylsulfoxide-d(6) in less polar 1,1,2,2-tetrachloroethane-d(2) showed a similar trend.
Related Papers
- → Photophysical investigations of the solvent polarity effect on the properties of coumarin-6 dye(2005)59 cited
- → The solvent effect on di-t e r t-butyl nitroxide. A dipole–dipole model for polar solutes in polar solvents(1979)85 cited
- → Solvent effect in pericyclic reactions. X. The cheletropic reaction(1996)11 cited
- → An ab initio MC-SCF study of the solvent effects in polar and non-polar [2 + 2] cycloadditions(1995)7 cited
- → Surface Polarity Modulation Enables High-Performance Polyamide Membranes for Separation of Polar/Non-Polar Organic Solvent Mixtures(2024)1 cited