A H-bond induced two-dimensional in finite coordination polymer[Zn(1,3-BDC)(Im)2]n·2nCH3 OH(1,3-BDC =1,3-benzenedicarboxylate,Im =imidazole)was synthesized and crystallo-graphically determined by X-ray dif fracti...A H-bond induced two-dimensional in finite coordination polymer[Zn(1,3-BDC)(Im)2]n·2nCH3 OH(1,3-BDC =1,3-benzenedicarboxylate,Im =imidazole)was synthesized and crystallo-graphically determined by X-ray dif fraction.The crystal structure belongs to monoclinic system with space group C2/c.a=23.1836(2),b=10.1905(1),c=17.0118(2)?,β=115.099°,V=3639.58(6)?3,D=1.499g·cm-3,Z =8,F000=1688,μ=1.384mm-1,R1=0.0715,wR2=0.1645.Each Zn?ion is four-coordinated with a geome try of distorted tetrahedron.Each 1,3-BDC acts as a bridge to bond two neighboring zinc ions,leading to an infinite o ne-dimensional chainlike coordination polymer.Each chain wa s linked by hydrogen bonds with its neighbors to form a two-dimensional net.展开更多
The lithium sodium borate glasses doped with Eu3＋ ion are prepared using melt quenching technique, their structural and optical properties have been evaluated. The density of pre- pared glasses exhibits an inverse be...The lithium sodium borate glasses doped with Eu3＋ ion are prepared using melt quenching technique, their structural and optical properties have been evaluated. The density of pre- pared glasses exhibits an inverse behavior to the molar volume ranging from 2.26 g/cm3 to 2.43 g/cm3 and 26.95 cm3/mol to 26.20 cm3/mol, respectively. The absence of sharp peaks in XRD patterns confirms the amorphous nature of the prepared glasses. The absorption spectra yield four transitions centered at 391 nm （7F0→5L6）, 463 nm （7F0→5D2）, 531 nm （7F0→5D1）, and 582 nm （7F0→5D0）. The most intense red luminescence is observed at 612 nm corresponding to 5D0→7F2 transition under 390 nm laser excitations.展开更多
文摘A H-bond induced two-dimensional in finite coordination polymer[Zn(1,3-BDC)(Im)2]n·2nCH3 OH(1,3-BDC =1,3-benzenedicarboxylate,Im =imidazole)was synthesized and crystallo-graphically determined by X-ray dif fraction.The crystal structure belongs to monoclinic system with space group C2/c.a=23.1836(2),b=10.1905(1),c=17.0118(2)?,β=115.099°,V=3639.58(6)?3,D=1.499g·cm-3,Z =8,F000=1688,μ=1.384mm-1,R1=0.0715,wR2=0.1645.Each Zn?ion is four-coordinated with a geome try of distorted tetrahedron.Each 1,3-BDC acts as a bridge to bond two neighboring zinc ions,leading to an infinite o ne-dimensional chainlike coordination polymer.Each chain wa s linked by hydrogen bonds with its neighbors to form a two-dimensional net.
文摘The lithium sodium borate glasses doped with Eu3＋ ion are prepared using melt quenching technique, their structural and optical properties have been evaluated. The density of pre- pared glasses exhibits an inverse behavior to the molar volume ranging from 2.26 g/cm3 to 2.43 g/cm3 and 26.95 cm3/mol to 26.20 cm3/mol, respectively. The absence of sharp peaks in XRD patterns confirms the amorphous nature of the prepared glasses. The absorption spectra yield four transitions centered at 391 nm （7F0→5L6）, 463 nm （7F0→5D2）, 531 nm （7F0→5D1）, and 582 nm （7F0→5D0）. The most intense red luminescence is observed at 612 nm corresponding to 5D0→7F2 transition under 390 nm laser excitations.
