摘要
N,N'-二(2-氨丙基)草酰胺(H2apo)、硫氰酸根与铜?离子在适宜条件下可通过自组装方式形成配合物犤Cu2(apo)(NCS)2犦n,单晶解析结果表明这是一个新型的二维网状结构配位高分子。铜?由反式双三齿配体apo2-和硫氰酸根通过μ2-SCN的方式共同桥连。研究发现该固体在弱酸性溶液中、过氧化氢存在条件下对壳聚糖(一种氨基多糖)具有催化裂解作用。初步的分级分离结果表明降解寡糖分子量大部集中在3000～5000范围。
A novel two-dimensional network copper (11) complex bridged by N, N'-bis (2-aminopropyl) oxamide dianion (apo) and thiocyanate [Cu(apo) (NCS)(2)]n has been isolated and characterized by IR, electronic spectra, EPR and X-ray diffraction analysis. The crystal structure belongs to monoclinic, space group P2(1)/c with cell dimensions, a = 7.3131 (14), b = 10.22860(13), c = 11.199(2) Angstrom; beta = 106.63(2); V = 807.2(2) Angstrom(3), Z = 2, F(000) = 452, R-1 = 0.0502, wR(2) = 0.1057. The complex shows a pronounced two-dimensional character developing along the a axis. Within the layer the copper (11) ions are bridged by both apo(2-) and NCS-, the former behaving as a bis (tridentate) ligand in a trans conformation whereas the latter bridges the copper centers in asymmetric end-to-end fashion extending along the be plane to form an infinite network. In this layer, every apo(2-) links four neighbor apo(2-)s by hydrogen bonds. The complex could catalysis-oxidation cleaving chitosan as a matrix with H2O2 presented. This method can narrow the molecular weight distribution.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2003年第1期20-24,共5页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金资助项目(No.20061001)
国家高技术研究发展专项经费资助。
