摘要:
Four copper(I) complexes of 2,11-dithia[3.3]paracyclophane (dtpcp), [CuI(dtpcp)] . MeCN (1), [CuBr(dtpcp)] . MeCN (2), [CuCl(dtpcp)] . MeCN (3) and [Cu2I2(dtPCP)(2)] . Me-thf (4) (Me-thf = 2-methyltetrahydrofuran), have been synthesized and their molecular structures determined by X-ray crystallography. Complexes I and 2 are isostructural, and exhibit 31) networks with elliptical channels along a-axis, which are constructed by dtpcp molecules bridging zigzag CuI and CuBr chains, respectively. Complexes 3 and 4 are 21) porous sheet networks constructed by bridging the zigzag copper-dtpcp chains via rhombic ring of Cu2X2 (X = Cl or 1). All sheets in 3 are packed in an eclipsed manner through pi-pi stackings to generate channels along the a-axis. However, the 2D porous sheets in 4 are packed in an offset mode such that channels are not formed along c-axis. Complexes I and 2 can reversibly incorporate guest acetonitriles without collapse of structures, and the original frameworks of I and 2 are completely recovered after incorporation of guests which are confirmed by X-ray powder diffraction (XRPD) pattern and H-1 NMR spectrum. Additionally, complex I exhibits selectivity in size and polarity for guest inclusion. (C) 2004 Elsevier B.V. All rights reserved.