摘要
随着社会经济的快速发展,石油资源消耗与日俱增,环境污染日趋严重。为了解决上述问题,高效利用可再生资源并将其转化为具有市场竞争力的绿色可再生产品具有十分重要的意义。近年来,以绿色可再生的生物质资源构建光学材料是一大研究热点。传统的荧光材料表现为聚集导致荧光猝灭(ACQ)现象,大大限制其在聚集态下的应用。与之性能相反的聚集诱导发光(AIE)材料克服前者在聚集态下荧光猝灭的缺点,在检测、成像、生物诊疗和光电器件等领域大力发展。在此背景下,以可再生、可持续发展、生物相容性好的生物质资源作为原材料开发生物基AIE材料的研究逐渐引起了研究人员的兴趣。植物化学品作为一种重要的生物质资源,经提取或化学修饰,可最终制备为具有AIE性能的光学材料。笔者逐层阐述了植物化学品AIE材料、植物化学品衍生物AIE材料和植物化学品基AIE纳米材料3个方向的研究进展。植物化学品涉及生物碱、黄酮、维生素和其他植物化学品;植物化学品衍生物包括生物碱衍生物、黄酮衍生物、萜类衍生物、香豆素衍生物及其他植物化学品衍生物;植物化学品基AIE纳米材料涵盖植物化学品基纳米颗粒和碳点。对相关的AIE材料研究从发光机制、性能以及应用等方面进行详略结合的综述。最后,对植物化学品基AIE材料的研究进展进行总结,分析了该研究领域内存在的问题,对未来发展方向进行了展望。
With the rapid development of social economy, the consumption of oil resources has been increased day by day, and the environmental pollution has become more and more serious. In order to solve these problems, it is of great significance to make efficient use of renewable resources and transform them into green renewable products with good market competitiveness. In recent years, the construction of optical materials from green and renewable biomass resources is a research hotspot. Traditional fluorescent materials emit light in the molecular state, while the quench emission in the aggregate state is considered as aggregation-caused quenching(ACQ). This property has limited its application as thin films and aggregates in a large extent. In contrast, the aggregation-induced emission(AIE) materials can solve the problem of fluorescence quenching in the aggregate state, giving a rise for the vast development in the areas of sensing, imaging, theranostics, and optoelectronics. In this context, the development of biomass-based AIE materials using renewable, sustainable, and biocompatible biomass resources as raw materials has gradually attracted the researchers’ interests. As one vital renewable biomass resource, phytochemicals can be extracted or chemically modified to produce optical materials with the AIE property. In this review, the research progress of AIE materials in phytochemicals, phytochemical derivatives, and phytochemical-based nanomaterials is prograssively demonstrated. Phytochemicals include both small phytochemicals and natural polymers, such as alkaloids, flavonoids, vitamins, as well as cellulose and lignin. Phytochemical derivatives are obtained from alkaloids, flavonoids, terpenoids, coumarins, as well as other phytochemicals of curcumin, digitonin, vitamins, cellulose, and lignin. Meanwhile, phytochemical-based nanomaterials cover both nanoparticles and carbon dots. Moreover, the corresponding research progress is reviewed from three aspects: luminescence mechanism, properties, and applications. The luminescence mechanism is focused on AIE, involving restricted intramolecular motions, excited-state intramolecular proton transfer, distorted intramolecular charge transfer, and thermally activated delayed fluorescence. Properties include AIE, aggregation-induced enhanced emission, and various stimuli-responsive behaviors, such as photochromism, thermochromism, mechanochromism, et al. Phytochemicals have evolved into AIE materials with four major applications, namely, probes, imaging, OLEDs, and phototheranostics. In the end, the authors make a summary, propose existing problems, and provide scientists with inspirations for working on the exploration of phytochemical-based AIE materials.
作者
黄申林
仲伟仁
张雪丹
李守济
蔡旭敏
HUANG Shenlin;ZHONG Weiren;ZHANG Xuedan;LI Shouji;CAI Xumin(Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Rescources,College of Chemical Engineering,Nanjing Forestry University,Nanjing 210037,China)
出处
《林业工程学报》
CSCD
北大核心
2022年第6期34-45,共12页
Journal of Forestry Engineering
基金
国家自然科学基金(21601087)。
关键词
聚集诱导发光
植物化学品
衍生物
纳米材料
发光机制
aggregation-induced emission
phytochemical
derivative
nanomaterial
luminescence mechanism
