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Structural Diversity and Luminescent Properties of Lanthanide 2,2- and 2,3-Dimethylsuccinate Frameworks

DOI: 10.1039/c2ce26279g DOI Help

Authors: Paul Saines (The University of Cambridge, U.K.) , Mark Steinmann (The University of Cambridge, U.K.) , Jin-chong Tan (University of Oxford) , Hamish Yeung (NIMS) , Tony Cheetham (The University of Cambridge, U.K.)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Crystengcomm

State: Published (Approved)
Published: September 2012

Abstract: The structures of fourteen new lanthanide frameworks (La, Ce, Eu, Tb, Y and Lu) containing the 2,2- or 2,3-dimethylsuccinate ligands are reported. While the majority of the known 2,2-dimethylsuccinate frameworks feature two dimensionally bonded layers, capped by hydrophobic methyl groups, several of these new frameworks adopt quite different architectures. These include one dimensional inorganically connected chains (La and Ce) with only non-covalent interactions in the other two dimensions, and three dimensional covalently bonded frameworks (Eu and Lu) with spaces in their structure to accommodate the bulky methyl groups. The new 2,3-dimethylsuccinate frameworks (La and Y) adopt three-dimensional covalently bonded frameworks, with the pores in the La phase large enough to accommodate both the methyl groups whilst retaining a small accessible void volume. The factors affecting the formation of structures with different dimensionalities are examined and compared to previously reported transition metal frameworks. In addition, the sequence of phases formed with changing lanthanide size, concentrations and temperatures are rationalised. The luminescent properties of several 1- and 2-D frameworks doped with Eu and Tb are reported, with the Y host exhibiting the most intense emission.

Subject Areas: Materials, Chemistry

Instruments: I11-High Resolution Powder Diffraction

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