Abstract
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.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
