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基于四苯乙烯的柔性发光材料的构筑及性能研究

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柔性发光材料凭借在不同外力作用下仍能保持形状完整和发光性能的特点，在技术生产的多个领域有着广泛的应用。利用四苯基乙烯作为发色基团，利用硫醇与双键高效点击聚合的方法，构筑了一系列荧光强度可调的柔性发光材料。通过调节参与聚合的不同官能度硫醇单体的比例，制备了机械性能优异的聚合物网络，其断裂伸长率为377％，断裂应力为33。0 MPa，韧性可达90。6 MJ/m3。通过外力诱导分子构象变化，发现材料的荧光量子产率会随着拉伸程度的增加而升高。同时，该材料在溶胀后会发生荧光淬灭，挥发溶剂后荧光重新出现，符合聚集诱导发光的规律。基于以上研究，该柔性发光材料的机械性能优秀且荧光强度可调，因此有望在发光传感器、信号探测器等方向开展实际应用。
Construction and Properties of Flexible Light-Emitting Materials Based on Tetraphenylethylene
Flexible light-emitting materials find broad applications across various realms of technical production owing to their capacity to uphold structural integrity and luminescent efficacy amidst diverse external forces.In this study,a range of flexible light-emitting materials featuring tunable fluorescence intensity have been synthesized with tetraphenylethylene as the chromophore group,employing a highly efficient thiol-ene click polymerization.By adjusting the ratio of thiol monomers with varying functional degrees involved in polymerization,a polymer network with superior mechanical properties is achieved.This network exhibits an elongation at break of 377％,a fracture stress of 33.0 MPa,and an impressive toughness of up to 90.6 MJ/m3.Because of the changes of molecular conformation owing to the external forces,the fluorescence quantum yield of the materials rises in tandem with the degree of stretching.Additionally,fluorescence quenching is observed following swelling,and the fluorescence re-emerging upon solvent volatilization,aligning with the principles of aggregation-induced emission.Drawing from the aforementioned study,this flexible light-emitting materials exhibit exceptional mechanical characteristics and tunable fluorescence intensity,poised to find practical utility in the realm of light-emitting sensors and signal detection.

aggregation-induced emissionflexible light-emitting materialspolymer networkmechanical propertiesmodu-lated fluorescence intensity

王源浩、孙钰凯、刘昱远、张照明、颜徐州

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上海交通大学化学化工学院 上海 200240

上海交通大学变革性分子前沿科学中心 上海 200240

聚集诱导发光 柔性发光材料 聚合物网络 机械性能 荧光强度调控

聚烯烃催化技术与高性能材料国家重点实验室和上海市聚烯烃催化技术重点实验室西安交通大学金属材料强度国家重点实验室资助项目

SKL-LCTP-20230120222409

2024

10.6023/cjoc202403051

有机化学
中国化学会,中国科学院上海有机化学研究所

有机化学

CSTPCD北大核心
影响因子：1.09
ISSN：0253-2786
年,卷(期)：2024.44(8)