期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 21, 期 11, 页码 3604-3610出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0jm03062g
关键词
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资金
- National Natural Science Foundation of China [50703038, 50973101, 50773035, 50533040]
- Specialized Research Fund for the Doctoral Program of Higher Education [20070358065]
- Chinese Academy of Sciences [kjcx2.yw.H02]
- National Basic Research Program of China [2006cb302900]
A novel crown functionalized diacetylene monomer, N-(2,3,5,6,8,9,11,12-octahydrobenzo[b][1,4,7,10,13] pentaoxacyclopentadecin-15-yl) pentacosa-10,12-diynamide (BCDA), was synthesized successfully. The copolymerized composite vesicles of BCDA and 10,12-pentacosadiynoic acid (DA) with embedded receptor sites for metal ions have been prepared and characterized. Their response to the presence of metal cations in aqueous solution has been investigated by monitoring changes of color and UV-vis absorption. Upon addition of a series of alkali, alkaline earth and transition metal cations such as Na+, K+, Mg2+, Ca2+, Fe2+, Co2+, Cu2+, Mn2+, Ba2+, Cd2+, Ag+, Pb2+ and Zn2+, only Pb2+ ion could induce a color change from blue to red observable by the naked eye, which clearly showed that PBCDA-PDA composite vesicles could act as a highly selective and sensitive probe to detect Pb2+ ions in aqueous solution with minor interference from other metal ions. The excellent Pb2+ ion selectivity of PBCDA-PDA composite vesicles was mainly attributed to the stronger complexation behavior of Pb2+ with crown ethers and the carboxylic acid at the lipid-solution interface which could perturb the polydiacetylene backbone.
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