科研之友
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摘要
A unique metal-organic framework (MOF) [Eu-2(L)(3)(phen)(2)](n) (1, H2L = 4,6-dibenzoylisophthalic acid, phen = 1,10-phenanthroline) has been synthesized under hydrothermal conditions and characterized by single-crystal X-ray analysis, elemental analyses, powder X-ray diffraction, TGA measurement as well as IR spectra. The crystal is of triclinic system, space group P (1) over bar, C90H52Eu2N4O18, M-r = 1781.32, a = 9.8697(4), b = 16.7466(6), c = 22.2556(10) angstrom, alpha = 87.113(3), beta = 77.575(5), gamma = 89.458(3)degrees, V = 3587.8(3) angstrom(3), Z = 2, D-c = 1.649 g/cm(3), F(000) = 1780, mu(MoKa) = 1.813 mm(-1), R-int = 0.0181, R = 0.0260 and wR = 0.0592 for 14000 observed reflections with I > 2 sigma(I). X-ray analysis shows that the title compound exhibits a 2D layer structure linked by L ligands with two coordination modes and two distinguished conformations, and further linked into a 3D supramolecular architecture through C-H center dot center dot center dot O weak interactions between hydrogen of phen phenyl ring and the carboxylate oxygen atom of adjacent sheets. In addition, the luminescence property of 1 was investigated.
