Two Near-infrared Emissive Lanthanide-based Metal-organic Complexes Constructed from Efficient Energy Transfer Ligand

摘要

Utilizing two polycarboxylic acids as primary ligands and 1,10-phenanthrolion as an auxiliary ligand in the existence of lanthanide nitrates, two lanthanide-based complexes formulated as [Nd_4(2,6-pydc OH)_6(Phen)4(H_2O)2](H_2O)2(1) and [Yb_2(mBDC)_3(Phen)_2]n(2)(2,6-H_2 pydc OH = 4-hydroxypyridine-2,6-dicarboxylic acid, m-H_2BDC = isophthalic acid, Phen = 1,10-phenanthroline) have been solvothermally synthesized. They have been fully characterized by satisfactory elemental analysis, FT-IR spectra, TGA and single-crystal X-ray diffraction. Single-crystal X-ray diffraction study reveals that 1 has a zero-dimensional structure and 2 exhibits a rare cds topological net structure. Compounds 1 and 2 exhibit strong characteristic emissions of Nd(Ⅲ) and Yb(Ⅲ) ions in the near-infrared(NIR) region.