Synthesis, crystal structure, and fluorescence property of two alkaline-earth metal organic complexes

abstract

Two alkaline-earth metal organic complexes {Ba₂(BTC)(H₂O)}n (1) and {Ca₄(BTC)2(DMF)2(H₂O)6}n (2) (where H₄BTC =1,2,4,5-benzenetetracarboxylate, DMF = N,N-dimethylformamide) based on H₄BTC ligand have been solvothermally synthesized and characterized by X-ray single crystal diffraction, infrared spectra and thermogravimetric analysis. Complex 1 is a 3D framework structure with (4,6,10)-connected network constructed from 4-connected BaO9 unit, 6-connected BaO10 unit and 10-connected BTC₄- unit, while complex 2 is a layered structure built from two types of helical chains with 4-connected BTC₄- units and 4-connected binuclear units (Ca₂O16 and Ca₂O₁₄N₂). In addition, their thermogravimetric behavior and fluorescence property has been investigated.

KEYWORDS:

• alkaline-earth metal
• meta-organic framework
• solvothermal synthesis
• crystal structure