Luminescent and Magnetic Cyano-Bridged Coordination Polymers Containing 4d−4f Ions: Toward Multifunctional Materials

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• 作者：Elena Chelebaeva ; Joulia Larionova ; Yannick Guari ; Rute A. S. Ferreira ; Luis D. Carlos ; Filipe A. Almeida Paz ; Alexander Trifonov ; Christian Gurin
• 刊名：Inorganic Chemistry
• 出版年：2009
• 出版时间：July 6, 2009
• 年：2009
• 卷：48
• 期：13
• 页码：5983-5995
• 全文大小：1081K
• 年卷期：v.48,no.13(July 6, 2009)
• ISSN：1520-510X

文摘

A new family of cyano-bridged coordination polymers Ln(H₂O)₅[M(CN)₈] (Ln = Eu, Tb, Sm, Gd; M = Mo, W) were obtained and characterized by X-ray diffraction, photoluminescence spectroscopy, and magnetic analyses. These compounds are isomorphous and crystallize in the tetragonal system P4/nmm, forming two-dimensional gridlike networks. The Eu- and Tb-containing coordination polymers are room-temperature optically active emitters displaying the characteristic ⁵D₀ → ⁷F_0-4 (Eu³⁺) and ⁵D₄ → ⁷F₆₋₂ (Tb³⁺) transitions. All of the coordination polymers except Eu(H₂O)₅[M(CN)₈] present long-range magnetic ordering at low temperatures. The coexistence of luminescence with ferromagnetic ordering for Tb(H₂O)₅[M(CN)₈] (M = Mo, W) suggests that these compounds may be considered as bifunctional magneto-luminescent coordination polymers exhibiting diverse physical responses when subjected to various external stimuli.