A two-fold interpenetrating 3D metal-organic framework material constructed from helical chains linked via 4,4 '-H(2)bpz fragments

摘要

A 3-connected dia-f-type metal-organic framework compound {[Ag(L)(3/2)H2PO4]}(n) (1) has been synthesized by self-assembly of 4.4'-H(2)bpz (L = 4,4'-H(2)bpz = 3,3',5,5'-tetramethyl-4,4'-bipyrazole) and Ag4P2O7 under hydrothermal conditions. It crystallizes in the tetragonal space group I4(1)/acd with a = 21.406(4) angstrom, b = 21.406(4) angstrom, c = 36.298(8) angstrom, Z = 32. X-ray single-crystal diffraction reveals that 1 has a three-dimensional framework with an unprecedented alternate left- and right-handed helices structure, featuring a non-uniform two-fold interpenetrated (4.14(2)) net. Photoluminescent investigation reveals that the title compound displays interesting emissions in a wide region, which shows that the title compound may be a good potential candidate as a photoelectric material. (C) 2008 Elsevier Inc. All rights reserved.