期刊
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
卷 -, 期 22, 页码 2892-2904出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.201700089
关键词
Coordination polymers; Lanthanides; Luminescence; Magnetic properties
资金
- Russian Science Foundation (RSF) [16-13-10537]
- Russian Foundation of Basic Research (RFBR) [15-03-07904a]
- Russian Science Foundation [16-13-10537] Funding Source: Russian Science Foundation
New 1D polymers, with the general formula [Ln(4-phbz)(3)](n), where Ln = Sm, Eu, Gd, Tb, Dy, Ho, and 4-phbz is the 4-phenylbenzoate anion, were synthesized by the reaction of Ln(NO3)(3)center dot xH(2)O, 4-phenylbenzoic acid, and dry KOH. Thermal analysis shows that [Eu(4-phbz)(3)](n) is thermally stable under an inert gas up to 350 degrees C, and it melts at 297 degrees C. It is shown that the 4-phenylbenzoate anion [E(T-1) approximate to 22500 cm(-1)] in [Ln(4-phbz)(3)](n) can play the role of an antenna and sensitize the luminescence of Eu3+ and Tb3+ ions. Analysis of the magnetic data of the [Gd(4-phbz)(3)](n) complex reveals weak antiferromagnetic coupling between Gd3+ ions (J = -0.053 cm(-1)). The [Dy(4-phbz)(3)](n) compound shows noticeable frequency-dependent chi '' signals, indicating slow magnetic relaxation and single-molecule magnet behavior, with an energy barrier of Delta E-eff/k(B) = 5 K.
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