An 8-Connected Chiral Lanthanide Metal-organic Framework Constructed from Naturally Camphoric Acid: Crystal Structure, Vibrational Circular Dichroism Spectroscopy and Second-order Nonlinear Optical Effect

摘要

A chiral lanthanide metal-organic framework based on enantiopure camphoric acid(D-H_2cam), [Nd_3(D-cam)8(H_2O)_4Cl]_n(1), has been synthesized and characterized by single-crystal X-ray structural analysis, elemental analysis, IR, thermal gravimetric, and X-ray powder diffraction. Crystal data for the title compound are as follows: orthorhombic system, space group P212121 with a = 13.8287(7), b = 14.0715(7), c = 25.7403(12) ?, V = 5008.8(4) ?3, M_r = 1333.08, Z = 4, F(000) = 2644, D_c = 1.768 g/cm3, μ(MoKα) = 3.189 mm-1, the final R = 0.0351 and w R = 0.0814(I > 2σ(I)). Compound 1 displays an 8-connected bcu topology 3D framework and hydrogen-bonding interactions stabilize the solid-state structure. The vibrational circular dichroism(VCD) spectrum and second-order nonlinear optical effect of compound 1 have been studied in the solid state.