期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 116, 期 -, 页码 102-110出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2013.06.122
关键词
Hetero-tetranuclear Zn(2)Ln(2)-arrayed; complexes; Mixed HL-bipyridine ligands; Sensitization of N1R luminescence
类别
资金
- National Natural Science Foundation [912222201, 21173165, 20871098]
- Program for New Century Excellent Talents in University from the Ministry of Education of China [NCET-10-0936]
- State Key Laboratory of Structure Chemistry [20100014]
- Provincial Natural Foundation [2011JQ2011]
- Shaanxi, the Education Committee Foundation of Shaanxi Province [11JK0588]
Through the self-assembly of the benzimidazole-based ligand HL (HL = 2-(1H-benzo[d]imidazol-2-y1)-6methoxyphenol) with zo(oAc)2.2H20, Ln(NO3)(3.6)H2O (Ln = Nd, Yb, Er or Gd) and 4,4'-bipyridine ligand (bpy, 4,4'-bipyridine or bpe, trans-bis(4-pyridyl)ethylene), two series of Zn2Ln2-arrayed complexes [Zn(2)Ln(2)(L)4(bPY)(NO3)6I (Ln = Nd, I; Yb, 2; Er, 3 or Gd, 4) and [2n(2)Ln(2)(L)4(bpe)(NO3)61 (Ln = Nd, 5; Yb, 6; Er, 7 or Gd, 8) were obtained, respectively. The result of their photophysical properties shows that the characteristic near-infrared (NIR) luminescence of Nd3+, Yb3+ or Er3+ ion has been sensitized from the excited state (both 1LC and 3LC) of the mixed HL and bipyridyl ligands in both complexes 1-3 and 5-7. Moreover, the change from bpy to bpe bridging for the fine-tuning of whole molecular conjugations, attributing to the different crossings of the two benzimidazole-based L ligands, has the important influence on their NIR luminescent properties. (C) 2013 Elsevier B.V. All rights reserved.
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