Synthesis and Magnetic Properties of a Tetranuclear Copper(II) Coordination Compound Constructed of a Multi-carboxylate Ligand and 2,2′-Bipyridine

A Highly Stable 3D Luminescent Indium-Polycarboxylic Framework for the Turn-off Detection of UO22+, Ru3+, and Biomolecule Thiamines

Hydrothermal reaction of the multidentate organic ligand (H₆TTHA) with indium chloride (InCl₃) produced a highly stable 3D luminescent indium-organic framework [In₂(OH)₂(H₂TTHA)(H₂O)₂]_n (1). Complex 1 exhibits remarkable luminescent properties, especially the multifunction sensitivity and selectivity for detecting Ru³⁺, UO₂²⁺; as well as small biomolecules thiamines (TPP, TMP, and TCl) based on a "turn-off" manner. In particular, the pyrophosphate groups of TPP and the phosphate groups of TMP could further affect the quenching rate, leading to different luminescent responds. In addition, we also discussed and proved the luminescence quenching mechanism in detail through comparative test and PXRD characterization. Therefore, complex 1 could be used as a kind of excellent luminescence sensor to detect Ru³⁺, UO₂²⁺, and thiamines (TPP, TMP, and TCl).

Photoelectric properties and potential nitro derivatives sensing by a highly luminescent of Zn(ii) and Cd(ii) metal–organic frameworks assembled by the flexible hexapodal ligand, 1,3,5-triazine-2,4,6-triamine hexaacetic acid

The luminescent quenching of coordination polymers 1 and 2 were especially obvious with the increasing of the nitro derivatives concentration, indicating 1 and 2 have very high sensitivity sensing properties.