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The solubilities of tetraphenyl piperazine-1,4-diyldiphosphonate (TPPDP) in (dichloromethane + ethanol) and (dichloromethane + n-hexane) were measured at temperatures from (283.15 to 308.15) K using a static analytic method. Experimental data are well-represented by the modified Apelblat and (CNIBS)/Redlich–Kister equations for describing the effects of temperature and solvent composition on solubility, respectively. It was found that TPPDP solubility in dichloromethane + n-hexane decreases with the addition of n-hexane, whereas it shows a maximum in dichloromethane + ethanol. The solubility data are well-correlated by Wilson, NRTL, and Jouyban–Acree models, in which Jouyban–Acree model achieves the best fitting results. Based on the modified Apelblat equation, the thermodynamic properties (i.e., the Gibbs free energy, enthalpy, and entropy) of solution in two binary solvent mixtures were derived. The results indicate that the dissolution of TPPDP in all studied cases is not spontaneous and energetic pred...

Synchrotron radiation photoemission spectroscopy (SRPES) has been used to study the electronic structure of the Au/CdZnTe(111)A for Au coverage ranging from about 0.3 up to 20 monolayers (ML). It is found tha a Schottky barrier with a height of 0.82 eV is formed at the initial deposition of Au. This barrier decrease gradually with increasing Au coverage, which can be ascribed to band bending caused by charge redistribution at the interface and the formation of a positive interface dipole introduced by Cd diffusion. After an annealing process, a signal due to the formation of Au-Cd alloy caused by exquisite Cd diffusion into Au overlayer i observed, and simultaneously the Schottky barrier height (SBH) reduces to 0.32 eV. The present work indicate that cation diffusion into metal overlayer plays a critical role in controlling the SBH.