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.