title: Synthesis and study on a series of phosphorescent Cu(I) complexes having sterically blocking ligands.
abstract: In this paper, we report six phosphorescent Cu(I) complexes with 1,10-phenanthroline-derived ligands and phosphorous ligands, including their synthesis, crystal structures, photophysical properties, and electronic nature. The Cu(I) center has a distorted tetrahedral geometry within the Cu(I) complexes. Theoretical calculation reveals that all emissions originate from triplet metal-to-ligand-charge-transfer excited state. It is found that the introduction of alkyl moieties into 2,9-positions of 1,10-phenanthroline is highly effective on restricting the geometric relaxation that occurs in excited states, which greatly enhances the photoluminescence (PL) performances, including PL quantum yield improvement, PL decay lifetime increase, and emission blue shift.
authors: Correction Department of Education, The Central Institute for Correctional Police, Baoding 071000, China. Electronic address: zhangk826@163.com.
authors: Kai
authors: K
authors: Zhang
authors: Institute of Penology, The Central Institute for Correctional Police, Baoding 071000, China.
authors: Dong
authors: D
authors: Zhang
mesh_terms: D056831:Coordination Complexes / Q000138:chemical synthesis* / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D008024:Ligands; D008027:Light; D049449:Luminescence; D008958:Models, Molecular; D015203:Reproducibility of Results; D013056:Spectrophotometry, Ultraviolet
chemical_list: D056831:Coordination Complexes; D008024:Ligands; D003300:Copper
keywords: Cu(I) complexes; Luminescence; Single crystal; Steric hindrance