We report herein crystal-engineering studies of coordination polymers and a molecular-looped complex containing two dipyridyl-amide ligands, 1,3-bis-pyridin-4-ylmethyl urea (L1) and N,N'-bis-4-methylpyridyl oxalamide (L2). The reaction of Cd(OAc)2 with L1 gives rise to [Cd(OAc)2(L1)]n (1), a 1-D chain through coordination to two L1 and two acetate ligands, and then the axial coordination to one urea's carbonyl group through the third L1 ligand leads 1 to form "a dimer of 1-D chains". With a slight change in the structural backbone from L1 to L2, the reaction of L2 with Cd(OAc)2 gives [Cd(OAc)2(L2)(H2O)]n (2), a 1-D chain structure.
View Article and Find Full Text PDFZhonghua Liu Xing Bing Xue Za Zhi
November 2005
Objective: To screen the severe acute respiratory syndromes (SARS) mimotopes with random phage peptide library and to investigate their immunogenicity.
Methods: Using SARS sera as selective molecule, a 12 mer phage peptide library was biopanned and positive clones containing the mimic epitopes were selected. The immuno-characteriation of the epitopes were then investigated.