title: Hetero-binuclear near-infrared (NIR) luminescent Zn-Nd complexes self-assembled from the benzimidazole-based ligands.
abstract: With the compound [Zn(HL(1))(2)(Py)] (H(2)L(1)=2-(1H-benzo[d]imidazol-2-yl)-6-methoxyophenol), Py=pyridine) or [Zn(HL(2))(2)(Py)] (H(2)L(2)=2-(1H-benzo[d]imidazol-2-yl)-4-bromo-6-methoxyphenol) as the precursor, complexes [ZnLn(HL(1))(2)(Py)(NO(3))(3)] (Ln=Nd, 1; Ln=Gd, 2) or [ZnLn(HL(2))(2)(Py)(NO(3))(3)] (Ln=Nd, 3; Ln=Gd, 4) were obtained by the further reaction with Ln(NO(3))(3)·6H(2)O (Ln=Nd or Gd). The result of their photophysical properties shows that the strong and characteristic near-infrared (NIR) luminescence of Nd(3+) ions for complexes 1 and 3 with emissive lifetimes in microsecond range, has been sensitized from the excited state ((1)LC and (3)LC) of the benzimidazole-based ligands, and the involvement of heavy atoms (Br) at the ligand endows the enhanced NIR luminescent property.
authors.affiliation: Shaanxi Key Laboratory of Degradable Medical Material, Northwest University, Xi'an 710069, Shaanxi, China.
authors.forename: Dan
authors.initials: D
authors.lastname: Zou
authors.forename: Weixu
authors.initials: W
authors.lastname: Feng
authors.forename: Guoxiang
authors.initials: G
authors.lastname: Shi
authors.forename: Xingqiang
authors.initials: X
authors.lastname: Lü
authors.forename: Zhao
authors.initials: Z
authors.lastname: Zhang
authors.forename: Yao
authors.initials: Y
authors.lastname: Zhang
authors.forename: Han
authors.initials: H
authors.lastname: Liu
authors.forename: Daidi
authors.initials: D
authors.lastname: Fan
authors.forename: Wai-Kwok
authors.initials: WK
authors.lastname: Wong
authors.forename: Richard A
authors.initials: RA
authors.lastname: Jones
mesh_terms: D001562:Benzimidazoles / Q000737:chemistry*; D056831:Coordination Complexes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D008024:Ligands; D049408:Luminescent Agents / Q000737:chemistry*; D008163:Luminescent Measurements; D008958:Models, Molecular; D009354:Neodymium / Q000737:chemistry*; D019265:Spectroscopy, Near-Infrared; D015032:Zinc / Q000737:chemistry*
chemical_list: D001562:Benzimidazoles; D056831:Coordination Complexes; D008024:Ligands; D049408:Luminescent Agents; D009354:Neodymium; C031000:benzimidazole; D015032:Zinc