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Indexed by:期刊论文

Date of Publication:2011-05-01

Journal:ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE

Included Journals:SCIE

Volume:637

Issue:6

Page Number:735-740

ISSN No.:0044-2313

Key Words:Cadmium borate; Solvothermal synthesis; Crystal structure; Hydrogen bonds; Thermal analysis

Abstract:Two new cadmium borates, [Cd(en)(3)][B(5)O(6)(OH)(4)](2)center dot 2H(2)O (en = ethylenediamine) (1) and [Cd(DETA)(2)][B(5)O(6)(OH)(4)](2) (DETA = diethylenetriamine) (2) were synthesized in a novel procedure under mild solvothermal conditions and characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental analysis, and TG-DTA. The compound 1 crystallizes in monoclinic system, space group P2(1)/c (No. 14) with a = 8.526(2) angstrom, b = 23.127(6) angstrom, c = 15.438(4) angstrom, beta = 94.320(3)degrees, V = 3035.5(13) angstrom(3), Z = 4. Compound 2 is triclinic, space group P (1) over bar (No. 2), a = 8.632(5) angstrom, b = 9.418(6) angstrom, c = 27.856(18) angstrom, a = 95.415(8)degrees, beta = 91.891(7)degrees, gamma = 93.563 (7)degrees, V = 2248(2) angstrom(3), Z = 3. The anionic units of the both structures, [B(5)O(6)(OH)(4)] are linked by hydrogen bonds to form a three-dimensional framework with large channels, in which the templating cadmium complex cations are located. The thermal decomposition performance of compound 1 requires three steps, whereas only two steps are needed for compound 2, which all lead to amorphous phases. These processes are well explained considering the structure and the change in the Cd(2+) coordination during heating.