Nanoscale Permanent Rings in Two- or Three-Dimensional Structure Constructed by the Self-Assembly of Copper(II)-Macrocyclic Complexes and Tetracyanonickelate(II)

Abstract

Self-assembly of polyazamacricyclic complexes of copper(II), [Cu(H2L1]4+, where L1 = 1,8-bis(2-aminoethyl)-1,3,6,8,13-hexaazacyclotetradecane, and [Cu(H2L2)]2+, where L2 = 1,8-bis(4-butylic acid)-1,3,6,8,13-hexaazacyclotetradecane, [Ni(CN)4]2- produces two-dimensional permanent ring structure (1) and three-dimensional network structure (2), respectively, in crystalline solid. The geometry around copper(II) ion is an z-elongated octahedron (1) and square pyramid (2). Inter molecular hydrogen bonding of 1 produces one-dimensional ring chain and 2 produces one-dimensional zig-zag shape coordination polymer. Hydrogen bonding of neighboring chains of 1 produces two-dimensional permanent ring structure with a nanoscale area and that of 2 produces three-dimensional network structure having one-dimensional channels with nanoscale cross-section in crystalline solid.