Synthesis, Crystal Structure,and Luminescent Property of One New Quinoxaline-substituted Nitronyl Nitroxide Complex Ni(acac)2(NITQ)2·2CH2Cl2

摘要

A new complex,[Ni(acac)_2(NITQ)_2]·2CH_2Cl_2 1(acac=acetylacetone,NITQ=2-(2'-quinoxalinyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide),was synthesized and characterized by elemental analysis,IR spectroscopy,UV-Vis absorption spectrum,and single-crystal X-ray diffraction.The crystal belongs to the monoclinic system,space group P2_1/c with a=9.6970(19),b=20.410(4),c=12.166(2)A,β=93.89(3)°,M_r=997.43,V=2402.3(8)A^3,Z=2,D_c=1.379 g/cm^3,F(000)=1040,μ=0.684 mm^(-1),the final R=0.0423 and wR=0.1197 for 2884observed reflections(I>2σ(I)).Compound 1 is found to assume a mononuclear structure,which is further linked into a three-dimensional(3D)supramolecular network by hydrogen-bonding,Cl…O weak contact andπ…πstacking interactions.Moreover,the luminescent properties of the ligand and compound 1 were further investigated in detail.