Copper Triazine Polycarboxylic Acid Crystalline Framework Materials: Synthesis, Structure and Multifunctional Properties with the Luminescent and Catalytic Reduction of 4-NP

Metal-organic frameworks are a class of promising materials that are widely used in various fields such as detection, catalysis, and adsorption. A new protonated coordination polymer [Cu-2(H(2)TTHA)(H2O)(6)] (1) containing two uncoordinated carboxylate acid groups was synthesized under the condition of hydrothermal, and a series of characterizations including elemental analysis, infrared spectroscopy, PXRD, thermogravimetric analysis, and ultraviolet-visible spectroscopy were performed. It has a 3D supramolecular network structure. In order to further study the reproducible synthesis conditions, we unexpectedly got a partly protonated coordination polymer material [Cu-3(H(3)TTHA)(mu(3)-O)(mu(3)-OH)(mu(2)-H2O)(2)(H2O)]center dot 2H(2)O (2), which was different from the structure of 1 and contained three uncoordinated carboxylate acid groups in the framework structure. It was found that coordination polymer 1 has good catalytic activity for the catalytic reduction of 4-NP under mild reaction conditions. In the meantime, it can be used as a sensor to detect a small amount of Fe3+ (1 mM), and the detection limit for Fe3+ is 21 mu M. The results show that 1 possesses a good application prospect in terms of fluorescence sensing and catalysis. (C) 2020 Published by Elsevier Ltd.