Synthesis,structural characterization and third-order non-linear optical property of new three-dimensional metal-organic framework K.Na.[M~(II)_2 (mu_6-btc)(mu_2-ox)(H_2O)_2].2H_2O (M = Ni,Co)

摘要

Two three-dimensional (3-D) isostructural metal-organic frameworks K.Na.[M~(II)_2 (mu_6-btc)(mu_2-ox)(H_2O)_2].2H_2O (M = Ni,Co) btc = 1,2,4,5-benzenetetracarboxylate,pyramellitate,Ci0H2Og"ox = oxalate,C_2O_1) have been synthesized hydrothermally and characterized by single-crystal X-ray diffraction.Each 3-D structure is built from the linkage of secondary building units of trinu-clear [M_3(CO_2)_3] clusters by a mixed connector of oxalate and pyromellitate.The third-order non-linear optical properties of the title compounds were studied and both exhibit the reverse saturable absorption and self-defocusing performance with the y values of 5.03 x 10~(-30) esu for 1 and 3.04 x 10_(-30) esu for 2.