Order-Disorder Transition of Carboxyl Terminated Chains in Polydiacetylenes Vesicles Probed by Second Harmonic Generation and Two-Photon Fluorescence
Chen, SL (Chen, Shun-li); Zhu, XF (Zhu, Xue-feng); Yang, FY (Yang, Fang-yuan); Pan, XC (Pan, Xue-cong); Gan, W (Gan, Wei); Yuan, QH (Yuan, Qun-hui)
2018
发表期刊CHINESE JOURNAL OF CHEMICAL PHYSICS
卷号31期号:3页码:269-276
摘要

To understand and control the interfacial properties of polydiacetylenes (PDAs) vesicles with Pi-conjugated backbone is very important for their colorimetric sensing of chemical and biological targets. In this work, we adopted 10, 12-pentacosadiynoic acid (PCDA) as the model molecule to prepare PDAs vesicles in aqueous solution with different forms (from monomer to blue-to-purple-to-red phase) by controlling the UV irradiation dose. The variations of the interfacial conformation of PDAs vesicles during chromatic transitions were inspected by the adsorption behaviors of probe molecules (4-(4-diethylaminostyry)-1- methylpyridinium iodide, D289) on vesicle surface with surface-specific second harmonic generation (SHG) and zeta potential measurements. Resonant SHG signal from D289 adsorbed on vesicle surface attenuated sharply, and the adsorption free energy as well as the corresponding two-photon fluorescence signal decreased slightly in chromatic transitions. While, the change in the surface density of the adsorbed D289 molecules for PDAs vesicles with different forms was relatively small as estimated from zeta potential measurements. The attenuation of the SHG intensity was thus attributed to the overall order-disorder transition and the changed orientation of D289 molecules caused by the gradual distortion of carboxyl head group driven by backbone perturbation.

关键词Polydiacetylenes Vesicle Polymerization Interfacial Adsorption Second Harmonic Generation Order-disorder Transition
DOI10.1063/1674-0068/31/cjcp1712238
收录类别SCI
WOS记录号WOS:000439232400004
引用统计
文献类型期刊论文
条目标识符http://ir.xjipc.cas.cn/handle/365002/5525
专题中国科学院特殊环境功能材料与器件重点试验室
作者单位1.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Key Lab Funct Mat & Devices Special Environm, Urumqi 830011, Peoples R China
2.Harbin Inst Technol Shenzhen, Sch Sci, Shenzhen 518055, Peoples R China
3.Harbin Inst Technol Shenzhen, Sch Mat Sci & Engn, Shenzhen 518055, Peoples R China
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Chen, SL ,Zhu, XF ,Yang, FY ,et al. Order-Disorder Transition of Carboxyl Terminated Chains in Polydiacetylenes Vesicles Probed by Second Harmonic Generation and Two-Photon Fluorescence[J]. CHINESE JOURNAL OF CHEMICAL PHYSICS,2018,31(3):269-276.
APA Chen, SL ,Zhu, XF ,Yang, FY ,Pan, XC ,Gan, W ,&Yuan, QH .(2018).Order-Disorder Transition of Carboxyl Terminated Chains in Polydiacetylenes Vesicles Probed by Second Harmonic Generation and Two-Photon Fluorescence.CHINESE JOURNAL OF CHEMICAL PHYSICS,31(3),269-276.
MLA Chen, SL ,et al."Order-Disorder Transition of Carboxyl Terminated Chains in Polydiacetylenes Vesicles Probed by Second Harmonic Generation and Two-Photon Fluorescence".CHINESE JOURNAL OF CHEMICAL PHYSICS 31.3(2018):269-276.
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