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Pajerowski D.M.,U.S. National Institute of Standards and Technology | Li Q.,Key Laboratory of Functional Inorganic Material Chemistry MOE | Li Q.,Heilongjiang University | Hyun J.,U.S. National Institute of Standards and Technology | And 8 more authors.
Dalton Transactions | Year: 2014

Three chloride-bridged lanthanide compounds, [Ln4Cl 6(CH3OH)12(OH)2] ·4Cl·2CH3OH [Ln = Gd (1), Dy (2) and Er (3)], have been unexpectedly isolated by the reactions of LnCl3·6H 2O and N,N′-bis(salicylidene)-1,2-(phenylene-diamine) (H 2L). X-ray crystallographic analysis reveals a triclinic cell with a unique defect-dicubane {Ln4} core and the structure across this series is nominally isomorphic. Measurements of direct current magnetic susceptibility and isothermal magnetization give insight into the relevant cluster Hamiltonians for 1, 2, and 3, and alternating current susceptibility shows slow relaxation in 2, but not in 1 or 3 down to 2 K and up to 1 kHz. This journal is © the Partner Organisations 2014.


Fei B.,Key Laboratory of Functional Inorganic Material Chemistry MOE | Fei B.,Harbin University | Yan P.,Key Laboratory of Functional Inorganic Material Chemistry MOE | Yan P.,Harbin University | And 6 more authors.
Journal of Luminescence | Year: 2016

A series of five rigid hexadentate salen-type (H2L) erbium complexes, namely, [Er2L(OAc)4(CH3OH)2]·2CH3OH (1), [Er2L3(CH3OH)]·2CH3OH (2), [Er3L3(OAc)3]·3CH3OH·H2O (3), [Er2L(acac)4]·2CH2Cl2 (4) and [Er2LL′L″(CH3OH)(H2O)2](ClO4)2·CH3OH·H2O (5) (H2L = N,N′-bis(2-oxy-3-methoxybenzylidene)-1,2-phenylenediamine, HL′=2-(2′-hydroxy-3′-methyloxy-phenyl)-benzimidazole and HL″=3-methoxysalicylaldehyde) have been isolated by reactions of H2L with various Er(III) salts. X-ray crystallographic analyses demonstrate that complexes 1, 2, 4 and 5 possess the unique Er2 core with a ratio of H2L/Er=1:2, 3:2, 1:2 and 1:1, respectively. Complex 3 is trinuclear with sandwich-type structure. All complexes 1-5 exhibit near-IR luminescence of Er(III) ions around 1530 nm with lifetime (2.45 μs), which can be rationalized on the basis of the disparate structural effects. © 2016 Elsevier B.V.

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