Structural Diversity of Six Coordination Polymers Based on the Designed X-Shaped Ligand 1111-Tetrakis(3-pyridiniourea)methylmethane

摘要

In this study, six coordination polymers (CPs), {[Ag2(L)(CF3SO3)]·CF3SO3·2H2O·DMF}n (>1), {[Ag(L)]·SbF6·4DMF·H2O}n (>2), {[Zn(L)0.5(I)2]·3.75H2O}n (>3), {[Cd2(L)(I)4(H₂O)(DMF)]·4H₂O·3DMF}_n (>4), {[Hg₂(L)(I)₄]·H₂O·4DMF}_n (>5) and {[Hg₂(L)(Cl)₄]·2H₂O·3DMF}_n (>6), were obtained based on the designed X-shaped urea-based ligand. X-ray single crystal diffraction analysis revealed that complex >1 displayed a 3D (3,4)-connected {6·8²}{6⁴·8²}->tcj net. Complex >2 featured a 2D 4-connected {4³·6³} sheet. Complexes >3 and >5 exhibited a 1D polymeric loop chain. Complex >4 displayed a 1D polymeric fishbone chain. Complex >6 showed a 2D 4-connected {4⁴·6²}->sql sheet. Structural comparison revealed that not only the metal ions, but also the anions played crucial roles in the control of final structures.