Cobalt phosphonates: An unusual polymeric cobalt phosphonate containing a clathrated phosphonate anion and a layered bisphosphonate

被引:46
作者
Bakhmutova, EV [1 ]
Ouyang, X [1 ]
Medvedev, DG [1 ]
Clearfield, A [1 ]
机构
[1] Texas A&M Univ, Dept Chem, College Stn, TX 77843 USA
关键词
D O I
10.1021/ic0301425
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Novel cobalt phosphonates [Co(H2O)(4)(H4L)][H2L].2H(2)O, 1, and Co-2(H2O)(2)(L), 2, have been synthesized from 1,8-octylenediphosphonic acid (H4L). 1 has been fully characterized by X-ray single-crystal data, TGA, IR spectroscopy, and chemical analysis. The compound crystallizes in the triclinic space group P (1) over bar with a = 5.5415(8) Angstrom, b = 8.6382(8) Angstrom, c = 16.794 (2) Angstrom, alpha = 87.694(2)degrees, beta = 80.859(2)degrees, gamma = 76.005(2)degrees, V = 770.11(19) Angstrom(3), and Z = 1. A cobalt atom lies in the center of symmetry and is octahedrally coordinated by two oxygen atoms from two undissociated diphosphonic ligands H4L and four molecules of water. The cobalt atom and undissociated ligand H4L are combined to form polymeric chains along the c-axis, resulting in the formation of a one-dimensional framework. The positive charge on the cobalt atom remains upon coordination and is balanced by a negatively charged uncoordinated ligand (H2L) found as a clathrate in the lattice. Two lattice water molecules, hydrogen-bonded with the coordinated and uncoordinated ligands, complete the structure. The metal phosphonate chains are held together and bridge the uncoordinated anionic ligands by a number of strong hydrogen bonds, which make the structure possible. Cobalt phosphonate 2 has been characterized by TGA measurements, IR spectroscopy, and chemical analysis. The compound has a layered structure with an interlayer spacing of 14.26 Angstrom. Metal phosphonate layers are cross-linked by hydrocarbon chains. The water molecules are coordinated to the metal atom. According to IR data, compound 2 contains two equivalent PO bonds and one different PO bond, which may be a result of the different types of Co-O-P connectivity within one phosphonic group.
引用
收藏
页码:7046 / 7051
页数:6
相关论文
共 38 条
[1]   Formation of colloidal dispersions of layered gamma-zirconium phosphate in water/acetone mixtures [J].
Alberti, G ;
Dionigi, C ;
Giontella, E ;
MurciaMascaros, S ;
Vivani, R .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1997, 188 (01) :27-31
[2]   First structural determination of layered and pillared organic derivatives of γ-zirconium phosphate by X-ray powder diffraction data [J].
Alberti, G ;
Vivani, R ;
Mascaros, SM .
JOURNAL OF MOLECULAR STRUCTURE, 1998, 470 (1-2) :81-92
[3]   Pillared derivatives of γ-zirconium phosphate containing nonrigid alkyl chain pillars [J].
Alberti, G ;
Murcia-Mascarós, S ;
Vivani, R .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1998, 120 (36) :9291-9295
[4]  
[Anonymous], SMART VERS 5 0 SAINT
[5]  
ARBUZOV AE, 1936, ZH OBSHCH KHIM, V6, P283
[6]   Synthesis and crystal structures of copper(II) diphosphonatoalkanes:: C4 and C5 [J].
Arnold, DI ;
Ouyang, X ;
Clearfield, A .
CHEMISTRY OF MATERIALS, 2002, 14 (05) :2020-2027
[7]   Iron(III)-phosphonate complexes [J].
Barja, BC ;
Herszage, J ;
Alfonso, MD .
POLYHEDRON, 2001, 20 (15-16) :1821-1830
[8]  
BELLAMY LJ, 1958, INFRARED SPECTRA COM, pCH18
[9]   SYNTHESIS OF NEW LAMELLAR IRON(III) PHOSPHONATES [J].
BUJOLI, B ;
PALVADEAU, P ;
ROUXEL, J .
CHEMISTRY OF MATERIALS, 1990, 2 (05) :582-589
[10]   Complexes formed between nitrilotris(methylenephosphonic acid) and M2+ transition metals:: Isostructural organic-inorganic hybrids [J].
Cabeza, A ;
Xiang, OY ;
Sharma, CVK ;
Aranda, MAG ;
Bruque, S ;
Clearfield, A .
INORGANIC CHEMISTRY, 2002, 41 (09) :2325-2333