摘要
通过表面张力法、浊点法、硫氰酸钴铵显色法和1HNMR研究了β-环糊精(β-CD)对聚氧乙烯十二烷基醚(PL)的包结作用.结果表明,β-CD可与PL形成2∶1和3∶1型两种超分子包结物,表现出不同的物理化学性质.PL的疏水性烷基链被包络进β-CD空腔中,形成了2∶1的超分子包结物;PL的亲水性聚氧乙烯基链被包络进β-CD空腔中,形成了3∶1的超分子包结物.结合实验结果,通过比较β-CD和PL分子的大小,提出了β-CD对PL分子两种可能的包结模式.
Inclusion of β-cyclodextrin (β-CD) with polyoxyethylene lauryl ether (PL) was studied by surface tension, cloud point, color reaction and ^1H NMR measurements. It was established that the inclusion of β-CD with PL affords supramolecular complexes with stoichiometric ratios of 2:1 and 3:1 in aqueous solution. Inclusion complex with the stoichiometry of 2:1 arises from the incorporation of lauryl group of PL into the cavity of β-CD, whereas inclusion complex with the stoichiometry of 3:1 arises from the incorporation of polyoxyethylene group of PL into the cavity of β-CD. A special configuration of the complex has been proposed based on experimental results and molecular sizes.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2005年第10期1174-1177,共4页
Acta Physico-Chimica Sinica
基金
甘肃省自然科学(中青年)基金(ZS011-A25-011-Z)
西北师范大学二期创新基金(NWNU-KJCXGC-02-09)资助项目~~