Three alkaline earth metal-organic frameworks based on fluorene-containing carboxylates:syntheses,st

• 作 者: Xinhui Zhou Qiang Chen Liang Li Tao Yang Jin Wang Wei Huang
• 机 构: Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials,Na
• 出 处: Science China(Chemistry)
• 发表日期: 2017年01期
• 关键词: dicarboxylic alkaline carboxylate chains emissions lights salts centered

Three metal-organic frameworks,{[Mg_2(MFDA)_2(DMF)_3]·0.5H_2O}_n(1),{[Ca(MFDA)(DMF)(H_2O)]·0.5DMF}_n(2)and[Ca(MFDA)(DMF)_2]_n(3)(DMF=N,N-dimethylformamide)have been synthesized by the solvothermal reactions between the ligand 9,9-dimethylfluorene-2,7-dicarboxylic acid(H_2MFDA)and the corresponding metal salts,respectively.The single crystal X-ray structural analyses reveal that compounds 1-3 display three-dimensional structures based on the M(Ⅱ)-O-C chains.It is interesting that the MFDA ligands in 1-3 have different dihedral angles between the two carboxylate groups ranging from 9.9(1)°to 41.8(2)°.All of compounds exhibit strong ligand-centered blue emissions under UV lights.Their thermal properties have also been studied.

Three metal-organic frameworks, {[Mg_2 (MFDA) _2 (DMF) _3] · 0.5H_2O} _n (1), {[Ca (MFDA) (DMF) (H_2O)] · 0.5DMF} (DMF = N, N-dimethylformamide) have been synthesized by the solvothermal reactions between the ligand 9,9-dimethylfluorene-2,7-dicarboxylic acid (H2MFDA) metal salts, respectively. Single crystal X-ray structural analyzes reveal that compounds 1-3 display three-dimensional structures based on the M (II) -OC chains. It is interesting that the MFDA ligands 1-3 have different dihedral angles Between the two carboxylate groups ranging from 9.9 (1) ° to 41.8 (2) °. All of compounds exhibit strong ligand-centered blue emissions under UV lights.Their thermal properties have also been studied.