2-D zinc coordination polymer with ellipse-like channels and blue fluorescence

A 2-D novel coordination polymer {[Na2Zn5(μ3-OH)2(BTB)4(H2O)4][Zn(H2O)6]}n · 6nH2O, (H3BTB = 1,2,3-benzenetricarboxylic acid) is obtained from the diffusion method. BTB3− adopts two kinds of μ5 coordination modes to bridge the zinc(II) centers to form a 2-D network with approximate ellipse-like channels. The framework is constructed from the interconnection of [Zn2(BTB)2] subunits with the linker of [Zn(μ3-O)2] subunits. The compound produces blue fluorescence with emission at 420 nm possibly assigned to LMCT.