Beryllium–beryllium double-π bonds in the octahedral cluster of Be2(μ2-X)4 (X = Li, Cu, BeF)

2018 ◽  
Vol 20 (37) ◽  
pp. 23898-23902 ◽  
Author(s):  
Xingman Liu ◽  
Min Zhang ◽  
Shuang Yu ◽  
Yun Geng ◽  
Xingxing Zhang ◽  
...  
Keyword(s):  
Octahedral Cluster

Double πBe–Be bonds formed by the help of s1-type electron donating ligand.

scholarly journals Люминесцентные свойства нестехиометрических кристаллов ниобата лития различного состава и генезиса (обзор)

2022 ◽  
Vol 130 (1) ◽  
pp. 171
Author(s):  
М.В. Смирнов ◽  
Н.В. Сидоров ◽  
М.Н. Палатников
Keyword(s):  
Wave Spectrum ◽  
Visible Region ◽  
Wavelength Region ◽  
Visible Spectrum ◽  
Luminescent Properties ◽  
Short Wave ◽  
Octahedral Cluster ◽  
Short Wavelength Region ◽  
Luminescence Centers ◽  
Near Ir

A brief review of the features of the defect structure and studies of the luminescent properties of nonlinear optical lithium niobate crystals of various compositions and genesis was given. It was established that the electron-hole pair NbNb4+-O- in the oxygen-octahedral cluster NbO6 emitted in the short-wavelength region of the visible spectrum (400-500 nm), while point defects (VLi and NbNb4+-NbLi4+ bipolarons) - in the long-wavelength region (500-620 nm). At the ratio of Li/Nb≈1 the luminescence was extinguished in the visible region of the spectrum due to decreasing the intrinsic luminescence centers. It was shown that the presence of polaron luminescence in the near-IR region (700-1050 nm) was due to the small polarons NbLi4+ and impurity ions Cr3+ localized in lithium and niobium octahedra. The energy transfer between the luminescence centers in the visible and near-IR spectral regions was detected. Moreover, luminescence in near-IR regions was dominant. Doping of LiNbO3 crystals with zinc and magnesium at ZnO<4.46 mol.% and MgO<5.29 mol.% led to decreasing luminescence of intrinsic defects (VLi, NbNb4+-NbLi4+). However, there was an increase of the contribution of the short-wave spectrum component at higher dopant concentrations because of the introduction of Zn and Mg into the origin positions of Nb ions.

The cubo-octahedral cluster in the fluorite-type lattice: A theoretical approach

1984 ◽  
Vol 52 (2) ◽  
pp. 114-123 ◽  
Author(s):  
S.F. Matar ◽  
J.M. Reau ◽  
P. Hagenmuller ◽  
C.R.A. Catlow
Keyword(s):  
Theoretical Approach ◽  
Octahedral Cluster ◽  
Fluorite Type ◽  
Type Lattice

ChemInform Abstract: Synthesis and Crystal and Molecular Structure of In(C5Me5): An Apparent Octahedral Cluster.

1986 ◽  
Vol 17 (48) ◽  
Author(s):  
O. T. JUN. BEACHLEY ◽  
M. R. CHURCHILL ◽  
J. C. FETTINGER ◽  
J. C. PAZIK ◽  
L. VICTORIANO
Keyword(s):  
Molecular Structure ◽  
Crystal And Molecular Structure ◽  
Octahedral Cluster

Metal–organic frameworks based on polynuclear lanthanide complexes and octahedral rhenium clusters

2019 ◽  
Vol 6 (6) ◽  
pp. 1518-1526 ◽  
Author(s):  
Yulia M. Litvinova ◽  
Yakov M. Gayfulin ◽  
Jan van Leusen ◽  
Denis G. Samsonenko ◽  
Vladimir A. Lazarenko ◽  
...  
Keyword(s):  
Lanthanide Complexes ◽  
Metal Organic Frameworks ◽  
Cluster Anion ◽  
Octahedral Cluster ◽  
Rhenium Cluster ◽  
Metal Organic

A series of MOFs comprising tetrahedral lanthanide complexes, isonicotinate linkers, and the octahedral cluster anion [Re6S8(CN)6]4– demonstrate structure-directing effects of the rhenium cluster.

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