摘要
在β-环糊精(β-CD)溶液中,加入阴离子表面活性剂(AS)可诱导1-溴萘(1-BrN)发射强的室温磷光(RTP).组成测定表明溶液中形成了稳定的1:1:1/1-BrN:β-CD:AS三元包合物.光谱和溶液表面张力分析显示阴离子表面活性剂的疏水性烷基链有一部分被包合在β-CD空腔内,未被包合部分则绕曲在β-CD腔口处从而为空腔内1-BrN分子的磷光提供了有效保护.因该三元包合物带有阴离子极性头基,其沉淀可均匀分散在溶液中,形成了稳定的乳状液.得到了稳定的RTP.
Intense room - temperature phosphorescence (RTP) of 1 - bromonaphthalene (1 -BrN) induced by anionic surfactants (AS) was studied in aerated aqueous β - cyclodextrin(β - CD) solution. It has been found that considerably enhanced RTP arises from the formation of the 1:1:1/AS: 1 - βrN : β - CD ternary inclusion complex. Analyses of spectral structure and surface tension of solutions suggest that the hydrophobic hardrocarbon chain of surfactants was partlyincluded in the apolar cavity of β - CD and the part with the polar head group of hydrocarbonchain located outside the cavity coiled over the top of β- CD,providing an effective protection for RTP. Since it contains a surfactant with a polar head group, the complex precipitate was homogeneously dispersed in aqueous solution and stable RTP was obtained.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1998年第5期453-458,共6页
Acta Chimica Sinica
基金
国家自然科学基金资助课题(29475206)
关键词
溴萘
环糊精
阴离子
表面活性剂
室温磷光
RTP
1-bromonaphthalene, β-cyclodextrin, anionic surfactants, room-temperature phosphorescence, inclusion
