3D lanthanide–transition-metal–organic frameworks constructed from tetranuclear {Ln4} SBUs and Cu centres with fsc net

Diaquabis(4-hydroxy-5-nitropyridine-2-carboxylato-κ2N1,O2)copper(II)

“…The title compound features a 3-nitro-4-hydroxyl-pyridine-6-carboxylate ligand, which was in situ generated by decarboxylation and nitration of 4-hydroxyl-pyridine-2,6-dicarboxylic acid under the hydrothermal conditions. A similar reaction has been reported (Xu et al, 2011). Structure analysis shows that the Cu II ion is centrosymmetrically coordinated by two N atoms [Cu-N = 1.9685 16 (Table 1).…”

“…For complexes based on the 4-hydroxylpyridine-2,6-dicarboxylic acid ligand, see: Zhao et al (2006Zhao et al ( , 2009Zhao et al ( , 2011. For a similar reaction to the formation of the ligand, see: Xu et al (2011).…”

A polymorphic lanthanide complex as selective Co2+ sensor and luminescent timer

“…So few documents about the coordination complexes polymorphism imply it is not convenient to get pure coordination complex polymorphism [11]. The lanthanide (4f) ions generally display higher (usually 8-9) and more variable coordination numbers than transition metal ions, with very small energy differences between different coordination numbers [13], this will result in more difficulties in synthesizing lanthanide complex polymorphism than transition metal, and also much more difficulties than organic molecule polymorphism.…”

Synthesis and characterization of two isostructural 3d–4f coordination compounds based on pyridine-2,6-dicarboxylic acid and 4,4′-bipyridine

“…Zhao et al (2007) reported the synthesis of Ln-Co heterometallic coordination polymers and radical adsorption properties. Xu et al (2011) reported four three-dimensional (3D) Ln-Cu metalorganic frameworks (MOFs) constructed from tetranuclear {Ln 4 } secondary building units (SBUs) and Cu centres with an fsc net. Zhao et al (2009a) reported a porous 3D Ln-Fe heterometal-organic framework containing high-spin Fe II ions.…”