AIEgen containing side-chain liquid crystalline polymers: Photoluminecence or photothermal, which dominate?
作者机构：College of Chemistry and Environmental EngineeringInstitute of Low-dimensional Materials Genome InitiativeShenzhen UniversityShenzhen 518060China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Optoelectronic EngineeringShenzhen UniversityShenzhen 518071China Key Lab of Environment-friendly Chemistry and Application in Ministry of EducationCollege of ChemistryXiangtan UniversityXiangtan 411105China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2022年第15卷第10期
页 面：9334-9340页
核心收录：
学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学]
基 金：supported by the National Natural Science Foundation of China(NSFC)(Nos.21875143,21674065,and 21975215) the Innovation Research Foundation of Shenzhen(Nos.SGG20190222175202275,JCYJ20180507182229597,and JCYJ20180305125649693) the Natural Science Foundation of Guangdong Province(No.2016A030312002)
主 题：luminescent liquid crystalline polymers dicyanodistyrylbenzene smectic A structure alkyl tail dependence photothermal conversion
摘 要：Why many luminescent liquid crystalline polymers(LLCPs)containing aggregation-induced emission luminogen(AIEgen)show weak emission is a question still to be ***,a series of LLCPs(α-Pns,n=4,8,and 12)with polynorbornene as main chain and twoα-dicyanodistyrylbenzene(α-DCS)as side chain are successfully synthesized to solve this *** scanning calorimetry(DSC),polarized light microscopy(PLM),one-dimentional(1D),two-dimentional(2D)middle-angle and wide-angle X-ray scattering(MAXS and WAXS)results demonstrate that the polymers form smectic A(SmA)phase with the side chains interdigitated packed within the smectic ***,the photophysical properties ofα-Pns were investigated by ultraviolet-visible(UV-vis)absorption,steady state and time-resolved spectroscopy,and photothermal *** show that the polymers are AIE active,but emit weak *** emission peak ofα-Pns film red-shift from 473 to 531 nm,the quantum yield gradually increases from around 1.6%to 14.7%,and the photothermal conversion efficiency decreases from 39%to 19%with the alkyl tail length *** photothermal effect,but not photoluminescence,dominates the excited state relaxation.
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