Doping of MnO (less than One mole %) in LP glass system promotes the transparency and the general quality of the LP glass.- Mn2+ occupying an Oh site in the LP glass network - The influence of the LP glass network on ...Doping of MnO (less than One mole %) in LP glass system promotes the transparency and the general quality of the LP glass.- Mn2+ occupying an Oh site in the LP glass network - The influence of the LP glass network on Mn2+ energy levels and its electronic structure seems to be different when the concentration of MnO is extremely small (0.2 mole%) - The observation of single band of Mn2+ in this case probably correlates well with the observation of forbidden hyperfine EPR transitions in the same glass.展开更多
A novel crystalline zinc diphosphonate, （CH3NH3）4Zn2（xbp）2·H2O, denoted as compound 1, was ionothermally synthesized from tetraethyl-p-xylylenebisphosphonate （Yexbp） and Zn（OAc）2 in a protic eutectic mixt...A novel crystalline zinc diphosphonate, （CH3NH3）4Zn2（xbp）2·H2O, denoted as compound 1, was ionothermally synthesized from tetraethyl-p-xylylenebisphosphonate （Yexbp） and Zn（OAc）2 in a protic eutectic mixture with urea/methylamine hydrochloride. Its structure was determined by single-crystal X-ray diffraction data and had a special three-dimensional open framework with rhombic channels. Compound 1 belongs to the monoclinic system （space group C2/c）, with lattice parameters a=22.6876（19）A, b=8.7376（7）A, c=8.1673（9）A, β= 108.146（2）°, V= 1538.5（2） A^3, Z=2. Its structure is totally different from the typical organic pillared structure, only two oxygens of the phosphonate group are coordinated with zinc atoms, and the third oxygen exists in the terminal form, which is similar to the popular dicarboxylate linkers in MOFs. The organic cations [CH3NH3]^＋ of the eutectic mixture played a structure-directing role for constructing this framework and were confined in the pore channels to balance the negative charges resulting from the zinc phosphonate inorganic chains.展开更多
文摘Doping of MnO (less than One mole %) in LP glass system promotes the transparency and the general quality of the LP glass.- Mn2+ occupying an Oh site in the LP glass network - The influence of the LP glass network on Mn2+ energy levels and its electronic structure seems to be different when the concentration of MnO is extremely small (0.2 mole%) - The observation of single band of Mn2+ in this case probably correlates well with the observation of forbidden hyperfine EPR transitions in the same glass.
基金This work was financially supported by the National Natural Science Foundation of China （Nos. 21276174, 21322608, 21436008）, Shanxi Province Science Foundation for Youths （No. 2014021005）, Program for the Innovative Talents of Higher Learning Institutions of Shanxi, and A Foundation for the Author of National Excellent Doctoral Dissertation of PR China （No. 201350）.
文摘A novel crystalline zinc diphosphonate, （CH3NH3）4Zn2（xbp）2·H2O, denoted as compound 1, was ionothermally synthesized from tetraethyl-p-xylylenebisphosphonate （Yexbp） and Zn（OAc）2 in a protic eutectic mixture with urea/methylamine hydrochloride. Its structure was determined by single-crystal X-ray diffraction data and had a special three-dimensional open framework with rhombic channels. Compound 1 belongs to the monoclinic system （space group C2/c）, with lattice parameters a=22.6876（19）A, b=8.7376（7）A, c=8.1673（9）A, β= 108.146（2）°, V= 1538.5（2） A^3, Z=2. Its structure is totally different from the typical organic pillared structure, only two oxygens of the phosphonate group are coordinated with zinc atoms, and the third oxygen exists in the terminal form, which is similar to the popular dicarboxylate linkers in MOFs. The organic cations [CH3NH3]^＋ of the eutectic mixture played a structure-directing role for constructing this framework and were confined in the pore channels to balance the negative charges resulting from the zinc phosphonate inorganic chains.
