Design and syntheses of two novel supermolecular frameworks through weak interactions
作者:Yanqin Wang、Rong Cao、Wenhua Bi、Xing Li、Xiaoju Li、Daofeng Sun
DOI:10.1016/j.molstruc.2004.11.021
日期:2005.3
Two novel supermolecular frameworks constructed by 2,2'-biquinoline-4,4'-dicarboxylic acid (H(2)bqdc) were synthesized and their crystal structures were characterized by single crystal X-ray diffraction. Complex [Cu(C12H30N6)](NaOH)(bqdc)center dot 2H(2)O (1) Crystallizes in the triclinic space group P-1, with a=7.181(7), b=8.869(9), c=14.105(14) angstrom, alpha=101.315(8), beta=100.487(6), gamma=97.282(14)degrees and Z=1. It exhibits a 2-D framework constructed through hydrogen bonds. The macrocyclic-Cu(II) units decorate to the sheet also through H-bondings. Complex [Ni(en)(2)(H2O2)(2)](bqdc)center dot 2H(2)O (2) crystallizes in the triclinic space group P-1, with a=6.86030(10), b=7.2061(2), c= 13.7801(4) angstrom, alpha=92.756(2), beta=101.2050(10), gamma=101.7210(10)degrees and Z=2. This complex exhibits a 3-D frameworks constructed also through weak interactions, especially H-bonding and pi-pi stacking. Interestingly, a hexa-oxygen ring was found in this structure formed by four water molecules and two carboxyl groups through hydrogen bonds. Thermography analyses of the two complexes were also tested. (c) 2004 Elsevier B.V. All rights reserved.