language: en

DOI: 10.1002/zaac.200700516

Synthesis and Characterization of a Purely Inorganic Open-framework Bimetallic Phosphite with Intersecting 12- and 16-membered Ring Channels

Gaijuan Li a , Yan Xing a, *, Yunling Liu b , Xianchun Liu a , Ning Xu a , and Shuyan Song a
Changchun / P R China,
a College of Chemistry, Northeast Normal University and b State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University

[Received October 14 th , 2007; accepted November 14 th , 2007.]

Abstract. A new three-dimensional open-framework cobalt-zinc phosphite [Co(H 2 O) 4 Zn(HPO 3 ) 2 ] · H 2 O (1), has been prepared under hydrothermal conditions and characterized by single-crystal Xray diffraction, XRD, IR and SQUID magnetometer. The compound crystallizes in the triclinic space group P1 ¯ with a 񮽙 7.552(5), b 񮽙 7.671(5), c 񮽙 9.443(5) A 񮽙 񮽙 88.538(5)°, β 񮽙 89.109(5)°, γ 񮽙 87.056(5)°, V 񮽙 546.1(6) A ˚ , Z 񮽙 2. The structure of 1 consists of corner-shared (cs) four-membered-ring chains formed by alternating ZnO 4 tetrahedra and HPO 3 pseudopyramids, which are further linked through CoO 2 (H 2 O) 4 octahedra giving rise to a three-dimensional (3-D) neutral open-framework with intersecting 12- and 16-MR channels. The synthesis of system required the presence of L-histidine which is not incorporated into the structure of the product. It is noteworthy that compound 1 represents the only known example of purely inorganic open-framework cobalt-zinc phosphite.

Keywords: Hydrothermal synthesis; Open-framework; Cobalt-zinc phosphite; Magnetic properties Introduction