The 1H NMR spectra of CTAB, SDS and Triton x-100 aqueous micellar solutions containing dimethyl phthalate have been determined. The results indicate that dimethyl phthalate in CTAB, SDS and niton x-100 micellar soluti...The 1H NMR spectra of CTAB, SDS and Triton x-100 aqueous micellar solutions containing dimethyl phthalate have been determined. The results indicate that dimethyl phthalate in CTAB, SDS and niton x-100 micellar solutions at a low solubilizing concentration is adsorbed on the Ancelle-water interface. With the increase of solubilizing concentration, it is preferentially solubilised in both the palisade layer and hardly solubilised in the centre of the micellar core in CTAB micellar solution, and it is preferentially solubilised in both the palisade layer and the micellar core in SDS micellar solution while it is solubilised and uniformly distributed along the hydrocarbon chain of the surfactant in niton X-100 micellar solution.展开更多
A series of organic anion-pillared hydrotalcites were synthesized by the ion exchange method and characterized by X-ray diffraction and Fourier transform infrared spectroscopy.The hydrotalcite precursor and pillared h...A series of organic anion-pillared hydrotalcites were synthesized by the ion exchange method and characterized by X-ray diffraction and Fourier transform infrared spectroscopy.The hydrotalcite precursor and pillared hydrotalcites with different anions was tested as catalysts in transesterification of dimethyl carbonate（DMC） with phenol.The results show that the catalytic selectivity of this transesterification reaction over these organic anion-pillared hydrotalcites is significantly improved.The catalytic selectivities of C4H4O4-,C6H8O4-,C10H16O4-,（1,4-）C8H4O4-,and C7H5O2-pillared hydrotalcites for transesterified products（diphenyl carbonate and methyl phenyl carbonate） are all greater than 90%,at least 10% higher than that of the hydrotalcite precursor.Under the conditions of（n（phenol））/（n（DMC））=4,catalyst amount=1.5%,and t=10 h,the C6H8O4-pillared hydrotalcite presents the best catalytic performance,and the DMC conversion and the selectivity for transesterified products reach 43.8% and 93.2%,respectively.展开更多
文摘The 1H NMR spectra of CTAB, SDS and Triton x-100 aqueous micellar solutions containing dimethyl phthalate have been determined. The results indicate that dimethyl phthalate in CTAB, SDS and niton x-100 micellar solutions at a low solubilizing concentration is adsorbed on the Ancelle-water interface. With the increase of solubilizing concentration, it is preferentially solubilised in both the palisade layer and hardly solubilised in the centre of the micellar core in CTAB micellar solution, and it is preferentially solubilised in both the palisade layer and the micellar core in SDS micellar solution while it is solubilised and uniformly distributed along the hydrocarbon chain of the surfactant in niton X-100 micellar solution.
文摘A series of organic anion-pillared hydrotalcites were synthesized by the ion exchange method and characterized by X-ray diffraction and Fourier transform infrared spectroscopy.The hydrotalcite precursor and pillared hydrotalcites with different anions was tested as catalysts in transesterification of dimethyl carbonate（DMC） with phenol.The results show that the catalytic selectivity of this transesterification reaction over these organic anion-pillared hydrotalcites is significantly improved.The catalytic selectivities of C4H4O4-,C6H8O4-,C10H16O4-,（1,4-）C8H4O4-,and C7H5O2-pillared hydrotalcites for transesterified products（diphenyl carbonate and methyl phenyl carbonate） are all greater than 90%,at least 10% higher than that of the hydrotalcite precursor.Under the conditions of（n（phenol））/（n（DMC））=4,catalyst amount=1.5%,and t=10 h,the C6H8O4-pillared hydrotalcite presents the best catalytic performance,and the DMC conversion and the selectivity for transesterified products reach 43.8% and 93.2%,respectively.
基金Supported by the Natural Science Foundation of Hunan Province(0 0 JJY2 0 1 1 0 ) and Scientific Re-search Fund of Hunan Provincial Education Department(0 1 C0 2 2
