期刊
MACROMOLECULAR CHEMISTRY AND PHYSICS
卷 223, 期 22, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.202200216
关键词
benzaldehyde; organic amines; pH discrimination; polydiacetylene; thermochromism
资金
- National Natural Science Foundation of China [22105005]
- Anhui Laboratory of Functional Coordinated Complexes for Materials Chemistry and Application [LFCCMCA-03]
A benzaldehyde substituted diacetylene vesicle formed through self-assembly in water is reported. This novel vesicle displays colorimetric response to temperature, pH, and organic amines, and has potential as a promising sensor.
Here, a benzaldehyde substituted diacetylene vesicle formed through a self-assembly strategy in water is reported. Under UV irradiation, conjugated polydiacetylene (PDA) could be generated in the blue phase by 1,4-addition topopolymerization. Furthermore, this newly developed PDA vesicle displays distinctive colorimetric response to triple stimuli, including temperature, pH, and organic amines. Specifically, a clear blue-to-purple-to-red chromatic transition is observed for the PDA vesicle upon a gradient heating procedure from 25 to 75 degrees C. Although no obvious colorimetric changes happen when the PDA vesicle is exposed to acidic environments, it gradually turns into red color in alkaline aqueous solution or atmosphere with increasing pH values. More interestingly, this PDA vesicle can serve as an excellent sensor to distinguish some typical aliphatic/aromatic amines based on its different colorimetric and morphologic transformation behaviors. It is suggested that the incorporated benzaldehyde head group in PDA plays an essential role for the resulting responsiveness to the various environmental stimuli. As the preparation method is simple and straightforward, the novel PDA vesicle introduced here holds great potential as a promising sensor with the naked eye.
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