Structure, Luminescence, and Adsorption Properties of Two Chiral Microporous Metal−Organic Frameworks

Two 3D chiral multifunctional microporous MOFs, Zn3(BTC)2(DMF)3(H2O)·(DMF)(H2O) (1) and Cd4(BTC)3(DMF)2(H2O)2·6(H2O) (2) (H3BTC = 1,3,5-benzenetricarboxylic acid and DMF = N,N‘-dimethylformamide), have been
synthesized in the presence of organic bases tributylamine (TBA) and triethylamine (TEA), respectively. 1
(C30H38N4O18Zn3) crystallizes in the tetragonal P41212 space group (a = 13.6929(19) Å, c = 50.664(10) Å, V =
9499(3) Å3, and Z = 8). 2 (C33H39N2O28Cd4) crystallizes in the tetragonal P4322 space group (a = 10.3503(4) Å,
c = 52.557(3) Å, V = 5630.4(4) Å3, and Z = 4). X-ray crystallography reveals that 1 consists of a 3D open
framework with the (63)4(62·82·102)(6·482)2 topology, but 2 exhibits a 3D open network with the (42·5)2(4·45·106·87·482)
topology. The solid-state excitation−emission spectra show that the strongest excitation peaks for 1 and 2 are at
341 and 319 nm, and their emission spectra mainly show strong peaks at 410 and 405 nm, respectively. The
amounts adsorbed of 1 (2) are 169 mg/g (126 mg/g) for H2O, 137 mg/g (102 mg/g) for C2H5OH, and 133 mg/g (99
mg/g) for CH3OH, which are equivalent to the adsorption of about 62 (34) H2O, 20 (11) C2H5OH, and 28 (16)
CH3OH per unit cell, respectively.