Hydrothermal Synthesis, Structures and Luminescent of 1D Lanthanide–Metal Organic Frameworks Based on Rigid 5-Nitroisophthalic Acid Linker

Abstract

1D coordination chain frameworks of [Eu(NIPH)(BDCA)(H2O)2]2(H2O)5 (1), [Sm(NIPH)(BDCA)(H2O)2] (2), [Dy(NIPH)(BDCA)(H2O)2]2 (3), [Gd(HNIPH)(BDCA)(H2O)2](H2O)0.5 (4), [Ce(HNIPH)(BDCA)(H2O)2](H2O)0.5 (5), [Nd(HNIPH)(BDCA)(H2O)2](H2O)0.5 (6), [Dy(NIPH)(ox)0.5(H2O)3](H2O)2 (7) [Er2(NIPH)(ox)0.5(H2O)3](H2O)2 (8), [Y2(NIPH)(ox)0.5(H2O)3](H2O)2 (9), [Eu2(NIPH)(ox)0.5(H2O)3](H2O)2 (10) (H2NIPH = 5-nitroisophthalic acid, H2DBCA = biphenyl-2,2′-dicarboxylic acid, ox = oxalic acid) were synthesized by hydrothermal reaction and characterized by single-crystal X-ray diffraction. These compounds were constructed of [Ln2O2] dimers bridged through the carboxylate groups of H2NIPH ligands. These compounds contain an -Ln–O–C–O–Ln- zigzag chain, which connect to each other through the oxygen atoms of the H2NIPH ligands to form a wave-like layer. In addition, when accretion equiv [Bu4N]F at room temperature the compound 1 emission enhancement.