配位:聚合物由于在催化材料、磁性材料和光学材料等领域中具有广泛的应用价值,近年来已引起人们的极大关注.除了配位键以外,氢键等弱作用力也是构筑无限延展体系配位聚合物的重要途经.在大多数体系中,一般采用含氮、含氧基团作为桥联配体合成具有不同拓扑结构的无限网络,而采用含硫配体构筑配位聚合物的研究相对较少.
A novel coordination polymers [ Cu2 (ETU) 6 ] SO4 ( 1 ) ( ETU = ethylidene thiourea) was synthesized under solvothermal conditions. The crystal structure of the polymer was determined by X-ray diffraction : trigonal, space group R3c( No. 161 ), a = 1. 275 09(8) nm, b = 1.27:5 09(8) nm, c =3. 574 7(7) nm, γ = 120°, Z =6, CCDC Number: 605501. In the structure of the polymer, each metal ion Cu( Ⅰ ) coordinates to three S atoms attached to the ring of ETU forming two triangular pinwheel-shape monovalent cations [Cu(ETU)3]^ +, in one of which the counter-ion SO42- is located. The ions with contrary charge, [Cu(ETU) 3 ] ^+ and SO4^2-, are held together via the N-H…O hydrogen-bonded interactions resulting in a three-dimensional supramolecular network.