Four coordination polymers constructed by a novel octacarboxylate functionalized calix[4]arene ligand: syntheses, structures, and photoluminescence property†
Abstract
Four novel coordination polymers, [(CH3)2NH2][Zn3(HL)(H2O)2]·4H2O (1), [Co4(L)(DMF)2(H2O)8]·6H2O (2), [Ni4(L)(DMF)2(H2O)8]·6H2O (3) and [(CH3)2NH2][Mn3(HL)(DMF)(H2O)6]·6H2O (4) (H8L = 2,8,14,20-tetra-methyl-4,6,10,12,16,18,22,24-octa-carboxymethoxy-calix[4]arene and DMF = N,N-dimethylformamide) have been synthesized. Their structures have been confirmed and further characterized by relative physical methods. Compound 1 reveals a 2D double layer. Compounds 2 and 3 are isomorphous, and demonstrate identical 3D (3,6)-connecting nets with (42·6)(44·62·88·10) topologies. Compound 4 features a 3D binodal 5-connected (46·64)(46·64) framework. The UV-vis spectra of compounds 1–4 have been explored. The solid-state luminescence of compound 1 and its fluorescence property in various suspensions has also been investigated at room temperature. Moreover, the luminescence sensing properties of 1 for nitroaromatic compounds have been studied in detail.