An unusual (3,10)-coordinated 3D network coordination polymer as a potential luminescent sensor for detection of nitroaromatics and ferric ion

A cadmium coordination polymer {[Cd-3(itp)(2)(btc)(2)]center dot 4H(2)O} n (1) (itp = 1-imidazol-1-yl-3-(1,2,4-triazol-4-yl) propane, btc = 1,3,5-benzenetricarboxylate) was synthesized and characterized. 1 shows an unusual (3,10)-coordinated 3D network based on the [Cd-3(COO)(4)] trimeric clusters. 1 is a good luminescence sensor for detection of nitrophenol nitroaromatics TNP, 2,4-DNP, 4-NP, ANP and 2-NP, especially for TNP. 1 also exhibits high sensitive and selective luminescence sensor for detection of Fe3+ even in the presence of the competing ions. These selective luminescence quenching phenomena are mainly attributed to the energy-transfer quenching mechanism. 1 is a good luminescence sensor for detection of nitrophenol nitroaromatics and Fe3+. The detection limits of TNP, ANP and Fe3+ are 0.12 mu M, 0.71 mu M and 0.12 mu M, respectively.