Synthesis and Solid-State Luminescence of Mn(Ⅱ)Complex Constructed by 2-Naphthalic Acid/1,10-Phenanthroline
A case of binuclear manganese complex[Mn2(L)4(phen)2(H2O)2](1)was synthesized under solvothermal conditions with 2-naphthalic acid(HL)and 1,10-phenanthrenoline(phen)as ligands and manganese carbonate as the metal source.Complex 1 was characterized by single-crystal X-ray diffraction,elemental analysis,fourier transform infrared spectroscopy,powder X-ray diffraction,and thermogravimetric analysis.single-crystal X-ray diffraction shows that complex 1 belonged to the triclinic crystal system Pl space group and the crystal cell parameters are a=0.769 89(5)nm,b=1.175 86(5)nm,c=1.668 30(9)nm,and α=107.074(5)°,β=96.167(5)°,γ=106.901(5)°.The asymmetric unit consists of a manganese ion,two 2-naphthoate anions,one 1,10-phenanthroline ligand and one water molecule,and Mn(Ⅱ)atom is in a distorted octahedral configuration.The asymmetric units are bridged by carboxyl-oxygen atoms to form a dinuclear structure and then the binuclear structures are linked into a 2D supramolecular structure through π…π stacking interactions.The results of fluorescence spectroscopy show that complex 1 has good fluorescence performance and the maximum emission wavelength is 416 nm(λex=302 nm).Thermogravimetric analysis shows that complex 1 remains stable to 117 ℃,and then begins to lose water of 3.18％,the structure after dehydration can stabilize at 223℃,after which the organic framework begins to collapse.Hirshfeld surface analysis is used to study the interaction between molecules.
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