School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, People's Republic of China.
School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, People's Republic of China.
Spectrochim Acta A Mol Biomol Spectrosc. 2018 Oct 5;203:408-414. doi: 10.1016/j.saa.2018.06.003. Epub 2018 Jun 2.
Three mononuclear Cu(I) complexes, namely, [Cu(2-PBO)(PPh)]·ClO·2CHCl (1), [Cu(3-PBO)(PPh)(ClO)]·CHCl (2) and [Cu(PBM)(PPh)]·ClO (3) (2-PBO = 2-(2'-Pyridyl)benzoxazole, 3-PBO = 2-(3'-Pyridyl)benzoxazole, PBM = 2-(2'-Pyridyl)benzimidazole, PPh = triphenylphosphine) have been synthesized and characterized by elemental analyses, IR, H NMR, C NMR, X-ray single crystal diffraction and thermal analysis. Photoluminescent investigation shows that complexes 1-3 exhibit distinct tunable light green (512 nm)-to-yellow (557 nm) photoluminescence by varying the N-heterocyclic ligands. Three complexes show intense 2-PBO-based yellow, 3-PBO-based light green and intense PBM-based bright green luminescence upon irradiation with a standard UV lamp (λ = 254 nm) at room temperature. Moreover, the electrochemical properties of 1-3 have been investigated by cyclic voltammetry. The results suggest the frontier molecular orbits and the HOMO-LUMO energy gaps of these cuprous complexes are effectively adjusted through the introduction of different N-heterocyclic ligands, thus achieving the selective luminescence of the cuprous complexes.
三种单核铜（I）配合物，即 [Cu(2-PBO)(PPh)]·ClO·2CHCl（1）、[Cu(3-PBO)(PPh)(ClO)]·CHCl（2）和 [Cu(PBM)(PPh)]·ClO（3）（2-PBO=2-(2'-吡啶基)苯并恶唑，3-PBO=2-(3'-吡啶基)苯并恶唑，PBM=2-(2'-吡啶基)苯并咪唑，PPh=三苯基膦）已通过元素分析、IR、H NMR、C NMR、X 射线单晶衍射和热分析进行了合成和表征。荧光研究表明，通过改变 N-杂环配体，配合物 1-3 表现出明显可调的绿光（512nm）到黄光（557nm）荧光。在室温下用标准紫外灯（λ=254nm）照射时，三个配合物显示出强烈的 2-PBO 基黄色、3-PBO 基绿光和强烈的 PBM 基亮绿色发光。此外，通过循环伏安法研究了 1-3 的电化学性质。结果表明，通过引入不同的 N-杂环配体，这些铜配合物的前线分子轨道和 HOMO-LUMO 能隙得到有效调节，从而实现了铜配合物的选择性发光。
