Anion radical salts of bis[1,2,5]thiadiazolotetracyanoquinodimethan (BTDA) containing forty kinds of alkylammonium ions were prepared whose molar ratios are unique for each cation and changed from 1:1 (2A–2L) to 2:3 (2M–2Z), 1:2 (2a–2m), and 2:5 (2n) with elongation of the side chains. The electrical conductivities of the salts are largely affected by the molar ratio and the spatial requirement of
Hybrid Germanium Iodide Perovskite Semiconductors: Active Lone Pairs, Structural Distortions, Direct and Indirect Energy Gaps, and Strong Nonlinear Optical Properties
作者:Constantinos C. Stoumpos、Laszlo Frazer、Daniel J. Clark、Yong Soo Kim、Sonny H. Rhim、Arthur J. Freeman、John B. Ketterson、Joon I. Jang、Mercouri G. Kanatzidis
DOI:10.1021/jacs.5b01025
日期:2015.6.3
phase-matchable SHG response with high laser-induced damage thresholds (up to ∼3 GW/cm(2)). The second-order nonlinear susceptibility, χS(2), was determined to be 125.3 ± 10.5 pm/V (1), (161.0 ± 14.5) pm/V (2), 143.0 ± 13.5 pm/V (3), and 57.2 ± 5.5 pm/V (4). First-principles density functional theory electronic structure calculations indicate that the large SHG response is attributed to the high density
报道了混合有机/无机锗钙钛矿化合物 AGeI3 的合成和性质(A = Cs,有机阳离子)。对该反应系统的系统研究导致了 6 种新型混合半导体的分离。以CsGeI3 (1)为原型化合物,我们制备了甲铵、CH3NH3GeI3(2)、甲脒、HC(NH2)2GeI3(3)、乙脒、CH3C(NH2)2GeI3(4)、胍、C(NH2)3GeI3( 5),三甲基铵,(CH3)3NHGeI3 (6) 和异丙基铵,(CH3)2C(H)NH3GeI3 (7) 类似物。化合物的晶体结构根据它们的维度进行分类,其中 1-4 个形成 3D 钙钛矿骨架和 5-7 个 1D 无限链。除了化合物 5(中心对称)和化合物 7(非极性无着丝粒)外,化合物 1-7 在极性空间群中结晶。3D 化合物的直接带隙为 1.6 eV (1),1.9 eV (2)、2.2 eV (3) 和 2.5 eV (4),而一维化合物的间接带隙为 2
Réactivité photochimique des dialkylamino-2 cyclohexène-2 ones et des sels d'ammonium correspondants
作者:J.C. Arnould、J. Cossy、J.P. Pete
DOI:10.1016/s0040-4020(01)97941-4
日期:——
Photolysis of 2-dialkylamino-2-cyclohexenones leads to α-ketoazetidines. The reactivity of 3-methyl-2-dialkylamino-2-cyclohexenones and the effect of the nature of the dialkylamino groups on the photocyclization are discussed. Photolysis of the corresponding ammonium salts in hydroxylic solvents led only to adduct formation.
The diiodoalanes (C5H7R2N2)AlI2 [6; R = Me (a), Ph (c)] are obtained from the corresponding alanes (C5H7R2N2)AlH2 (5) and [Me3NH]I in good yields. (C5H7R2N2)AlI2 [6; R = iso-Pr (b)] is alternatively prepared, as well as 6a, from the corresponding vinamidine lithium compound C5H7R2NLi (8) and AlI3. (C5H7Me2N2)AlBr2 (9a) is formed according to both methods. The X-ray structures of 6a and 6b are reported
二碘丙烷 (C5H7R2N2) AlI2 [6; R = Me (a), Ph (c)] 从相应的丙烷 (C5H7R2N2) AlH2 (5) 和 [Me3NH] I 以良好的产率获得。(C5H7R2N2) AlI2 [6; R = iso-Pr (b)] 以及 6a 由相应的联苯胺锂化合物 C5H7R2NLi(8) 和 AlI3 交替制备。(C5H7Me2N2)AlBr2(9a)根据两种方法形成。报道了 6a 和 6b 的 X 射线结构。
Direct synthesis and crystal structure of tetrameric copper(I) iodide with trimethylamine [CuI(NMe3)]4
作者:Olga A. Babich、Vladimir N. Kokozay
DOI:10.1016/s0277-5387(96)00431-7
日期:1997.1
The tetrameric cluster [CuIN(CH3)3}]4 has been synthesized directly from copper powder and trimethylammonium iodide in non-aqueous solutions (acetonitrile, N,N-dimethylformamide) and characterized by X-ray crystallography. The compound [CuIN(CH3)3}]4 possesses a molecularstructure. A tetrahedral Cu4 cluster with short CuCu distances (2.67 Å) is surrounded by an I4 tetrahedron, thus each face of