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A new four-coordinated manganese compound Mn_2(BPTC)(BPTC = biphenyl-2,4,4’,6-tetracarboxylate) with flu topology net was synthesized under hydrothermal conditions.Single-crystal X-ray diffraction analysis confirms its crystal belongs to the monoclinic system,space group C2/c with a = 12.2092(11),b = 14.6932(9),c = 8.9998(10) A,β= 108.256(12)°,Z = 4,V= 1533.2(2) A~3,D_c= 1.889 mg/m~3,μ = 1.69,F(000) = 864,the final R = 0.063 and wR = 0.201 for 1407 observed reflections(I > 2σ(I)).UV-Vis absorption spectrum shows the title compound has a strong absorption at 326 and 238 nm and the optical diffuse reflectance determination shows the band gap of the title compound is 3.15 eV.The theory calculation elucidated that the UV absorptions of the title compound mainly arise from the electron transition from bonding orbitals of BPTC~(4-) ligand to the empty orbitals of BPTC~(4-) and Mn(Ⅱ) ions.
A new four-coordinated manganese compound Mn 2 (BPTC) (BPTC = biphenyl-2,4,4 ’, 6-tetracarboxylate) with flu topology net was synthesized under hydrothermal conditions. Single-crystal X-ray diffraction analysis confirms its crystal belongs to The monoclinic system space group C2 / c with a = 12.2092 (11), b = 14.6932 (9), c = 8.9998 (10) A, β = 108.256 (12) °, Z = 4, V = 1533.2 A to 3, D c = 1.889 mg / m 3, μ = 1.69, F (000) = 864, the final R = 0.063 and wR = 0.201 for 1407 observed reflections (I> 2σ (I) spectrum shows the title compound has a strong absorption at 326 and 238 nm and the optical diffuse reflectance determination shows the band gap of the title compound is 3.15 eV. The theory calculation elucidated that the UV absorptions of the title compound mainly arise from the electron transition from bonding orbitals of BPTC ~ (4-) ligand to the empty orbitals of BPTC ~ (4-) and Mn (II) ions.