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Anion-induced self-assembly of luminescent and magnetic homoleptic cyclic tetranuclear Ln4(Salen)4 and Ln4(Salen)2 complexes (Ln = Nd, Yb, Er, or Gd)
Inorganic Chemistry
  • Weixu Feng, Shaanxi Key Laboratory of Degradable Medical Material, Shaanxi Key Laboratory of Physico-inorganic Chemistry, Northwest University
  • Yao Zhang, Shaanxi Key Laboratory of Degradable Medical Material, Shaanxi Key Laboratory of Physico-inorganic Chemistry, Northwest University
  • Zhao Zhang, Shaanxi Key Laboratory of Degradable Medical Material, Shaanxi Key Laboratory of Physico-inorganic Chemistry, Northwest University
  • Xingqiang Lü, Shaanxi Key Laboratory of Degradable Medical Material, Shaanxi Key Laboratory of Physico-inorganic Chemistry, Northwest University
  • Han Liu, Shaanxi Key Laboratory of Degradable Medical Material, Shaanxi Key Laboratory of Physico-inorganic Chemistry, Northwest University
  • Guoxiang Shi, Shaanxi Key Laboratory of Degradable Medical Material, Shaanxi Key Laboratory of Physico-inorganic Chemistry, Northwest University
  • Dan Zou, Shaanxi Key Laboratory of Degradable Medical Material, Shaanxi Key Laboratory of Physico-inorganic Chemistry, Northwest University
  • Jirong Song, Shaanxi Key Laboratory of Degradable Medical Material, Shaanxi Key Laboratory of Physico-inorganic Chemistry, Northwest University
  • Daidi Fan, Shaanxi Key Laboratory of Degradable Medical Material, Shaanxi Key Laboratory of Physico-inorganic Chemistry, Northwest University
  • Wai-Kwok Wong, Department of Chemistry, Hong Kong Baptist University
  • Richard A. Jones, Department of Chemistry and Biochemistry, University of Texas at Austin, 1 University Station A5300
Document Type
Journal Article
Language
English
Abstract
Unique homoleptic cyclic tetranuclear Ln4(Salen)4 complexes [Ln4(L)2(HL)2(μ3-OH) 2Cl2]·2Cl (Ln = Nd, 1; Ln = Yb, 2; Ln = Er, 3; Ln = Gd, 4) or Ln4(Salen)2 complexes [Ln4(L) 2(μ3-OH)2(OAc)6] (Ln = Nd, 5; Ln = Yb, 6; Ln = Er, 7; Ln = Gd, 8) have been self-assembled from the reaction of the hexadentate Salen-type Schiff-base ligand H2L with LnCl 3·6H2O or Ln(OAc)6·6H 2O (Ln = Nd, Yb, Er, or Gd), respectively (H2L: N,N′-bis(salicylidene)cyclohexane-1,2-diamine). The result of their photophysical properties shows that the strong and characteristic NIR luminescence for complexes 1-2 and 5-6 with emissive lifetimes in microsecond ranges are observed, and the sensitization arises from the excited state (both 1LC and 3LC) of the hexadentate Salen-type Schiff-base ligand with the flexible linker. Temperature dependence (1.8-300 K) magnetic susceptibility studies of the eight complexes suggest the presence of an antiferromagnetic interaction between the Ln3+ ions. © 2012 American Chemical Society.
Publication Date
1-1-2012
Publisher
American Chemical Society
DOI
10.1021/ic300918c
Link to Publisher's Edition
http://dx.doi.org/10.1021/ic300918c
ISSN (electronic)
1520510X
Citation Information
Weixu Feng, Yao Zhang, Zhao Zhang, Xingqiang Lü, et al.. "Anion-induced self-assembly of luminescent and magnetic homoleptic cyclic tetranuclear Ln4(Salen)4 and Ln4(Salen)2 complexes (Ln = Nd, Yb, Er, or Gd)" Inorganic Chemistry Vol. 51 Iss. 21 (2012) p. 11377 - 11386 ISSN: 00201669
Available at: http://works.bepress.com/zhao-zhang/3/