Dinuclear alkoxo-bridged copper(II) coordination polymers: Syntheses, structural and magnetic properties

作者：Seppala Petri^*; Colacio Enrique; Mota Antonio J; Sillanpaa Reijo

来源：Inorganica Chimica Acta, 2010, 363(4): 755-762.

DOI：10.1016/j.ica.2009.11.035

• Dinuclear copper(II) complexes
• Alkoxo-bridged complexes
• Coordination polymers
• Magnetic properties
• Pseudo-Jahn-Teller effect
• DFT calculations

The alkoxo-bridged dinuclear copper(II) complexes [Cu(2)(ap)(2)(NO(2))(2)] (1), [Cu(2)(ap)(2)(C(6)H(5)COO)(2)] (2) and [Cu(2)(ap)(2)mu-1,3-C(6)H(4)(COO)(2)(dmso)(2)]center dot dmso (3) (ap = 3-aminopropanolato and dmso = dimethyl sulfoxide) have been synthesized via self-assembly from copper(II) perchlorate, 3-aminopropanol as main chelating ligand and nitrite and isophthalate anions as spacers and benzoate anion as auxiliary ligand. Complexes 1 and 3 crystallize as 2D and 1D coordination polymers, respectively, and their structures consist of dinuclear [Cu(2)(ap)(2)](2+) units connected with nitrite and isophthalate ligands. The adjacent dinuclear units of 2 and 1D polymers of 3 are further connected by hydrogen bonds resulting in the formation of 2D layers. The variable temperature crystallographic measurements of 1 at 100, 173 and 293 K indicate the static Jahn-Teller distortion with librational disorder in the nitrite group. Experimental magnetic studies showed that complexes 1-3 exhibit strong antiferromagnetic couplings. The values of the magnetic exchange coupling constant for 1-3 are well reproduced by the theoretical calculations.

• 出版日期2010-3-1