TY - JOUR
T1 - Hetero-binuclear near-infrared (NIR) luminescent Zn-Nd complexes self-assembled from the benzimidazole-based ligands
AU - Zou, Dan
AU - Feng, Weixu
AU - Shi, Guoxiang
AU - Lü, Xingqiang
AU - Zhang, Zhao
AU - Zhang, Yao
AU - Liu, Han
AU - Fan, Daidi
AU - WONG, Rick W K
AU - Jones, Richard A.
N1 - Funding Information:
This work is funded by the National Natural Science Foundation ( 21173165 , 20871098 ), the Program for New Century Excellent Talents in University from the Ministry of Education of China ( NCET-10-0936 ), the research fund for the Doctoral Program (20116101110003) of Higher Education of China, the State Key Laboratory of Structure Chemistry (20100014), the Provincial Natural Foundation (2011JQ2011) of Shaanxi, the Education Committee Foundation of Shaanxi Province (11JK0588), Hong Kong Research Grants Council (HKBU 202407 and FRG/06-07/II-16) in P. R. of China, the Robert A. Welch Foundation (Grant F-816), the Texas Higher Education Coordinating Board (ARP 003658-0010-2006) and the Petroleum Research Fund, administered by the American Chemical Society (47014-AC5).
PY - 2012/12
Y1 - 2012/12
N2 - With the compound [Zn(HL1)2(Py)] (H2L 1 = 2-(1H-benzo[d]imidazol-2-yl)-6-methoxyophenol), Py = pyridine) or [Zn(HL2)2(Py)] (H2L2 = 2-(1H-benzo[d]imidazol-2-yl)-4-bromo-6-methoxyphenol) as the precursor, complexes [ZnLn(HL1)2(Py)(NO3)3] (Ln = Nd, 1; Ln = Gd, 2) or [ZnLn(HL2)2(Py)(NO 3)3] (Ln = Nd, 3; Ln = Gd, 4) were obtained by the further reaction with Ln(NO3)3·6H2O (Ln = Nd or Gd). The result of their photophysical properties shows that the strong and characteristic near-infrared (NIR) luminescence of Nd3+ ions for complexes 1 and 3 with emissive lifetimes in microsecond range, has been sensitized from the excited state (1LC and 3LC) of the benzimidazole-based ligands, and the involvement of heavy atoms (Br) at the ligand endows the enhanced NIR luminescent property.
AB - With the compound [Zn(HL1)2(Py)] (H2L 1 = 2-(1H-benzo[d]imidazol-2-yl)-6-methoxyophenol), Py = pyridine) or [Zn(HL2)2(Py)] (H2L2 = 2-(1H-benzo[d]imidazol-2-yl)-4-bromo-6-methoxyphenol) as the precursor, complexes [ZnLn(HL1)2(Py)(NO3)3] (Ln = Nd, 1; Ln = Gd, 2) or [ZnLn(HL2)2(Py)(NO 3)3] (Ln = Nd, 3; Ln = Gd, 4) were obtained by the further reaction with Ln(NO3)3·6H2O (Ln = Nd or Gd). The result of their photophysical properties shows that the strong and characteristic near-infrared (NIR) luminescence of Nd3+ ions for complexes 1 and 3 with emissive lifetimes in microsecond range, has been sensitized from the excited state (1LC and 3LC) of the benzimidazole-based ligands, and the involvement of heavy atoms (Br) at the ligand endows the enhanced NIR luminescent property.
KW - Sensitization and energy transfer
KW - UV-vis absorption
KW - Visible and NIR luminescence
KW - Zn-Ln arrayed benzimidazole-based complexes
UR - http://www.scopus.com/inward/record.url?scp=84867400100&partnerID=8YFLogxK
U2 - 10.1016/j.saa.2012.08.048
DO - 10.1016/j.saa.2012.08.048
M3 - Journal article
C2 - 22995466
AN - SCOPUS:84867400100
SN - 1386-1425
VL - 98
SP - 359
EP - 366
JO - Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
JF - Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
ER -