Tuning cadmium coordination architectures using 1,4-bis(1,2,4-triazol-1-ylmethyl)benzene and sulfoisophthalate

Abstract

In our efforts to tune Cd(II) coordination polymer architectures, three Cd(II) coordination polymers, {[Cd3(bbtz)4(sip)2(H2O)4]·12H2O}n (1), {[Cd3(bbtz)3(sip)2(H2O)6]·4H2O}n (2) and {[Cd3(bbtz)2(sip)2(H2O)8]·4H2O}n (3), were synthesized by the slow diffusion, direct reaction and hydrothermal methods using 1,4-bis(1,2,4-triazol-1-ylmethyl)benzene (bbtz) and sulfoisophthalate (sip). 1 shows a novel two-fold interpenetrating 5-connected 3D network, with a point symbol of 44·63·83. 2 displays an unusual 4-connected 2D network, with a point symbol of 42·63·8. 3 exhibits an unusual (3,3)-connected 2D network, with a point symbol of (83)2 and a 2D → 3D polythreaded network. The diverse structures demonstrate that the structures of coordination polymers can be tuned by the synthesis method. The luminescence and thermal stability were investigated.