Coordination Polymers Based on Heterohexanuclear Rare Earth Complexes: Toward Independent Luminescence Brightness and Color Tuning

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• 作者：Fran莽ois Le Natur ; Guillaume Calvez ; Carole Daiguebonne ; Olivier Guillou ; Kevin Bernot ; James Ledoux ; Laurent Le Poll猫s ; Claire Roiland
• 刊名：Inorganic Chemistry
• 出版年：2013
• 出版时间：June 3, 2013
• 年：2013
• 卷：52
• 期：11
• 页码：6720-6730
• 全文大小：671K
• 年卷期：v.52,no.11(June 3, 2013)
• ISSN：1520-510X

文摘

Reactions in solvothermal conditions between hexanuclear rare earth complexes and H₂bdc, where H₂bdc symbolizes terephthalic acid, lead to a family of monodimensional coordination polymers in which hexanuclear complexes act as metallic nodes. The hexanuclear cores can be either homometallic with general chemical formula [Ln₆O(OH)₈(NO₃)₆]²⁺ (Ln = Pr鈥揕u plus Y) or heterometallic with general chemical formula [Ln_6xLn鈥?sub>6鈥?xO(OH)₈(NO₃)₆]²⁺ (Ln and Ln鈥?= Pr鈥揕u plus Y). Whatever the hexanuclear entity is, the resulting coordination polymer is iso-structural to [Y₆O(OH)₈(NO₃)₂(bdc)(Hbdc)₂路2NO₃路H₂bdc]_{鈭?/sub>, a coordination polymer that we have previously reported. The random distribution of the lanthanide ions over the six metallic sites of the hexanuclear entities is demonstrated by ⁸⁹Y solid state NMR, X-ray diffraction (XRD), and luminescent measurements. The luminescent and colorimetric properties of selected compounds that belong to this family have been studied. These studies demonstrate that some of these compounds exhibit very promising optical properties and that there are two ways of modulating the luminescent properties: (i) playing with the composition of the heterohexanuclear entities or (ii) playing with the relative ratio between two different hexanuclear entities. This enables the independent tuning of luminescence intensity and color.}