New Mg2+, Mn2+ coordination complexes with quinoline-monoacylhydrazidate ligand via in situ acylation reaction

摘要: Abstract Through employing the in situ acylation of N 2 H 4 with 2, 3-quinoline dicarboxylic acid, three acylhydrazidate-extended coordination complexes, M(QLH)(H O) Cl (M = Mg ( 1 ) or Mn ); QLH = 2, 3-quinolinedicarboxylhydrazidate) and Mn(QLH) (H 3 ), were obtained under solvothermal conditions. The X-ray single-crystal diffraction analysis reveals that: (i) compounds feature a dinuclear structure. Via two kinds O–H⋯O O–H⋯Cl hydrogen bonds, discrete units self-assemble into 3-D supramolecular networks, which are stabilized by offset face-to-face π···π interactions; (ii) compound features mononuclear structure, self-assembles 2-D network via types N–H⋯N strong interactions strengthen 2D layers. All title characterized IR spectroscopy, elemental analysis, power TG analysis. photoluminescent properties , investigated. Compounds emitted green light maxima at 529 nm for λ ex  = 364 nm), 498 nm  = 366 nm), while purple 381 nm  = 338 nm). Furthemore, density functional theory (DFT) calculations carried out on excited electronic states order to further investigate emission mechanism. Meanwhile, variable-temperature magnetic susceptibilities indicated that there existed weak antiferromagnetic between (II) ions.