@article{a2d2093dff73469a8d14481b68933373,
title = "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)",
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.",
author = "Weixu Feng and Yao Zhang and Zhao Zhang and Xingqiang L{\"u} and Han Liu and Guoxiang Shi and Dan Zou and Jirong Song and Daidi Fan and WONG, {Rick W K} and Jones, {Richard A.}",
note = "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 Education Committee Foundation of Shaanxi Province (11JK0588), Hong Kong Research Grants Council (HKBU 202407 and FRG/06-07/II-16) in P. R. China, the Robert A. Welch Foundation (Grant F-816), the Texas Higher Education Coordinating Board (ARP 003658-0010-2006), and 11385 the Petroleum Research Fund, administered by the American Chemical Society (47014-AC5). ",
year = "2012",
month = nov,
day = "5",
doi = "10.1021/ic300918c",
language = "English",
volume = "51",
pages = "11377--11386",
journal = "Inorganic Chemistry",
issn = "0020-1669",
publisher = "American Chemical Society",
number = "21",
}