Keggin POMs Modified by Bonding to Multitrack Cu(bipy) Chains through Linearly Arrayed Terminal and Bridging Oxygen Atoms of the M3O13 Triad

• Published in: European Journal of Inorganic Chemistry Vol. 2007; no. 9; pp. 1268 - 1274
• Main Authors: Sha, Jingquan, Peng, Jun, Liu, Hongsheng, Chen, Jing, Dong, Baoxia, Tian, Aixiang, Su, Zhongmin
• Format: Book Review
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01.03.2007; WILEY‐VCH Verlag
• Subjects: Copper; N ligands; Organic-inorganic hybrids; Polyoxometalates
• ISSN: 1434-1948; 1099-0682
• DOI: 10.1002/ejic.200601017

Two novel complexes based on the Keggin POMs modified by the Cu(4,4′‐bipy) moiety, {[Cu(4,4′‐bipy)]3[HSiMo12O40]}·1.5H2O (1) and {[Cu(4,4′‐bipy)]4[SiW12O40]}·3H2O (2) (bipy = bipyridine), have been hydrothermally synthesized and characterized by routine physical methods and single‐crystal X‐ray diffraction. Complexes 1 and 2 represent the first examples of fully oxidized Keggin POM anions as pendant polydentate ligands covalently bonded to a multitrack Cu(bipy) polymer chain(s) through linearly arrayed Od···Oc···Od (Od, terminal oxygen; Oc, bridging oxygen) atoms of single M3O13 triad(s). In the crystalline lattice of 1, the 1D chain is constructed from a α‐[SiMo12O40]4– (SiMo12) cluster as a pendant tridentate ligand covalently bonded to three CuI(4,4′‐bipy) subunits, and the neighbouring polymer strands interconnect with the Keggin fragments geared like the teeth of a zipper. In compound 2, the 2D extended layer structure is composed of a α‐[SiW12O40]4– (SiW12) cluster as a pendant hexadentate ligand covalently bonded to four CuI(4,4′‐bipy) subunits and forms a 2D net‐texture structure with a large vacancy (30.9 × 10.6 Å), and the 2D layers are arranged in a parallel staggering fashion to form a 3D framework.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)