Synthesis, Structure and Near Infrared Fluorescence Property of a New Nd-MOF Based on a Triangular Benzylamine Ligand.

A new 3D metal-organic framework (Nd-MOF) {[NdL]·2NH(CH)·3HO} was successfully established via a solvothermal method with Nd ion and 5-(bis(4-carboxybenzyl) amino)-isophthalicacid (HL), and has also been characterized by X-ray diffraction, powder X-ray diffraction (PXRD), IR and photoluminescence(PL)spectrum. The neodymium ions are free of coordinated solvents, and the Nd-MOF exhibits strong near-infrared (NIR) fluorescence. Besides, Its NIR fluorescence property shows low temperature resistance, which is favorable for being used in the low temperature environment. Besides, the fluorescence lifetime of Nd-MOF is 6.03 μs, and the quantum yield is 1.2%. The small quantum yield may owe to large energy gap between the T1 of the ligand HL and the resonance energy level F of the Nd ion, or due to large crystal size of the Nd-MOF.