Crystal Chemistry of Cd2-xCuxP2O7, 0 ≤ x ≤ 2 Structure of CdCuP2O7
作者:A.Alaoui El Belghiti、A. Elmarzouki、A. Boukhari、E.M. Holt
DOI:10.1006/jssc.1994.1111
日期:1994.4
The domains of the system, Cd2-xCuxP2O7, O ≤ x ≤ 2, have been established by powder diffraction methods. Two solid solutions have been found near Cd2P2O7 (0 ≤ x ≤ 0.40) and Cu2P2O7 (1.60 ≤ x ≤ 2). A new phase with x = 1 has been identified using single crystal X-ray diffraction. The mixed diphosphate CdCuP2P7 (x = 1) crystallizes in monoclinic space group C2 with a = 6.806(7), b = 8.665(4), c = 4.504(2)
该系统的结构域,镉2- X的Cu X P 2 ö 7,O-≤ X ≤2,已经由粉末衍射方法确定。两个固溶体已经发现接近CD 2 P 2 ö 7(0≤ X ≤0.40)和Cu 2 P 2 ö 7(1.60≤ X ≤2)。使用单晶X射线衍射已鉴定出x = 1的新相。混合的二磷酸CdCuP 2 P 7(x = 1)在单斜空间群C 2中结晶,一个= 6.806(7),b = 8.665(4),C ^ = 4.504(2),β= 105.85(6)°,V = 255.5(3)3,λ(MoKα)= 0.71069埃,μ MoKα, = 89.26 cm -1,D calc = 4.55 g cm -3,D meas = 4.59(5)g cm -3,Z = 2,F(000)= 326,T = 298 K,R = 3.9%,R w对于247个观察到的反射= 5.1%。P 2 O 7基团显示出交错的构象,
Crystal Chemistry of Cd2-xCaxP2O7, 0 ≤ x ≤ 2 and the Structure Analysis of Cd1.25Ca0.75P2O7
作者:A.Alaoui El Belghiti、Ali Boukhari、Elizabeth M. Holt
DOI:10.1006/jssc.1993.1311
日期:1993.10
The system, Cd2-xCaxP2O7, 0 ≤ x ≤ 2, has been prepared in powder form at 1173 K and found to exist in four domains, A, B, C, and D. The materials of these domains have been identified by powder diffraction methods. A crystal of Cd1.25Ca0.75P2O7(Cd2-xCaxP2O7, x = 0.75) has been isolated in domain B (0.4 ≤ x ≤ 1.00) which has not been previously identified and structurally determined by single crystal
的系统,镉2- X的Ca X P 2 ö 7,0≤ X ≤2,已被以粉末形式制备的1173 K和发现四个畴存在,A,B,C,和D.的这些材料域已经通过粉末衍射法鉴定。CD的一个晶体1.25的Ca 0.75 P 2 ö 7(CD 2- X的Ca X P 2 ö 7,X = 0.75)的结构域B(0.4已经分离≤ X≤1.00),这是以前未曾确定并通过单晶X射线衍射确定的。该相在三边形空间群P 1 bar中结晶,其中a = 15.477(5),b = 7.222(2),c = 6.667(2)Å,α= 122.93(2),β= 154.78(9),γ= 60.68(2)°,且Z =2。最后的最小二乘法细化对1531个观察到的反射产生R = 5.4%。固态结构属于重铬酸盐家族,包含孤立的和偏食的P 2 O 4- 7基团,这些基团形成平行于三斜晶系细胞c轴的列。镉2+与氧具有六重配位的离子[Cd-O
Synthesis and electrochemical properties of metal(<scp>ii</scp>)-carboxyethylphenylphosphinates
作者:Montse Bazaga-García、Álvaro Vílchez-Cózar、Bianca Maranescu、Pascual Olivera-Pastor、Marko Marganovici、Gheorghe Ilia、Aurelio Cabeza Díaz、Aurelia Visa、Rosario M. P. Colodrero
DOI:10.1039/d1dt00104c
日期:——
herein the synthesis, structural characterization and electrocatalytic properties of three new coordination polymers, resulting from the combination of divalent metal (Ca2+, Cd2+ or Co2+) salts with (2-carboxyethyl)(phenyl)phosphinic acid. In addition to the usual hydrothermal procedure, the Co2+ derivative could also be prepared by microwave-assisted synthesis, in much shorter times. The crystal structures
Thermal behavior of Cd2+ and Co2+ phenyl-vinyl-phosphonates under non-isothermal condition
作者:N. Doca、Gabriela Vlase、T. Vlase、G. Ilia
DOI:10.1007/s10973-008-9347-x
日期:2008.11
The thermal behavior of Cd2+ and Co2+ phenyl-vinyl-phosphonates was studied using two different experimental strategies: the coupled TG-EGA (FTIR) technique by decomposition in nitrogen respectively air, and the kinetic analysis of TG data obtained in dynamic air atmosphere at four heating rates. In nitrogen two decomposition steps were observed: the loss of crystallization water, respectively the decomposition of the phenyl-vinyl radical. In air, the same dehydration was observed as the first step, but the second one is a thermooxidation of the organic radical with formation of the pyrophosphoric anion. The kinetic analysis of the TG non-isothermal data was performed by the isoconversional methods suggested by Friedman and Flynn, Wall and Ozawa, as well as by the non-parametric (Sempere-Nomen) method. All processes put in evidence in TG curves exhibit strong changes of the activation energy values with the conversion degree, which mean that these processes are complex ones. Assuming that each of these processes consists in two steps, the application of non-parametric method leads to average values of the activation energy close to the average values of this parameter obtained by isoconversional methods.
Synthesis, structure, and luminescent property of a novel cadmium (II) carboxyphosphonate with a 2D layered structure using 1,4-benzenedicarboxylic acid as second linker
and 1,4-benzenedicarboxylic acid as the second metal linker, a novelcadmium(II) carboxyphosphonate with a 2Dlayered structure, namely, [Cd2(HL)(bdc)] (1) (H3L═H2O3PCH2―NC5H9―COOH, H2bdc═HOOCC6H4COOH) has been synthesized under hydrothermal conditions. In compound 1, each Cd(II) atoms are octahedrally coordinated [Cd(1)O6, Cd(2)O6]. These cadmium octahedra form a 1D double chain along the b-axis through