Issue 44, 2009

Syntheses, structures, and magnetic properties of heterometallic coordination polymers with carboxyphosphonate linkers

Abstract

Five heterometallic coordination polymers were synthesized utilizing the multifunctional carboxyphosphonate ligand N-(phosphonomethyl)iminodiacetic acid (H4PMIDA), N(CH2PO(OH)2)(CH2COOH)2, with a coordinating nitrogen atom and two carboxylate and one phosphonate groups. The compounds were characterized structurally and magnetically. [Cu2M2(PMIDA)2(H2O)6]·3H2O for M = Mn (1-CuMn), Co (2-CuCo), and Cd (3-CuCd) are isostructural (space groupP21/n) and made of honeycomb-like 2D layers which, in turn, are made of unusual double-stranded meso-helices. [Cu2Ln2(PMIDA)2(C2O4)(H2O)6]·3.5H2O for Ln = La (4-CuLa) and Nd (5-CuNd)) are also isostructural (P21/c) but with open 3D framework structures. They contain dinuclear CuLn(PMIDA) secondary building units that are bridged by phosphonate tetrahedra and form infinite chains along the c axis. The chains are interconnected via carboxylic groups and form double-decker layers which, in turn, are connected by the oxalate linkers to form the open three-dimensional framework. The magnetic properties of the compounds were measured and analyzed in detail.

Graphical abstract: Syntheses, structures, and magnetic properties of heterometallic coordination polymers with carboxyphosphonate linkers

Supplementary files

Article information

Article type
Paper
Submitted
31 Jul 2009
Accepted
14 Sep 2009
First published
02 Oct 2009

J. Mater. Chem., 2009,19, 8442-8447

Syntheses, structures, and magnetic properties of heterometallic coordination polymers with carboxyphosphonate linkers

Z. Gu and S. C. Sevov, J. Mater. Chem., 2009, 19, 8442 DOI: 10.1039/B915459K

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