Reverse Thinking of the Aggregation-Induced Emission Principle: Amplifying Molecular Motions to Boost Photothermal Efficiency of Nanofibers
Reverse Thinking of the Aggregation-Induced Emission Principle: Amplifying Molecular Motions to Boost Photothermal Efficiency of Nanofibers
复制标题
聚集的逆向思考——诱导发射原理：放大分子运动，提高纳米纤维的光热效率
DOI：
10.1002/anie.202008292
复制
发表时间：
2020-09-15
影响因子：
16.6
通讯作者：
Tang, Ben Zhong
中科院分区：
文献类型：
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作者：
Li, Haoxuan;Wen, Haifei;Tang, Ben Zhong
利用聚集诱导发射(AIE)原理的逆向思维，我们展示了一种巧妙而通用的协议，用于放大分子运动以提高光纤的光热效率。采用同轴电纺丝法制备了以AIE活性分子的橄榄油溶液为核，PVDF-HFP壳层包裹的核壳纳米纤维。AIE活性分子的分子溶解状态允许它们在光激发下在纳米纤维中自由旋转和/或振动，从而显著提高了非辐射能量耗散的比例，提供了令人印象深刻的生热效率。光热评价表明，具有优异耐久性的核壳纳米纤维的光热转换效率可达22.36%，是非核壳纳米纤维的26倍。这种核壳纤维可以用于绿色零排放的光热纺织品和自然太阳光诱导的太阳能蒸汽发电。
Using reverse thinking of the aggregation-induced emission (AIE) principle, we demonstrate an ingenious and universal protocol for amplifying molecular motions to boost photothermal efficiency of fibers. Core-shell nanofibers having the olive oil solution of AIE-active molecules as the core surrounded by PVDF-HFP shell were constructed by coaxial electrospinning. The molecularly dissolved state of AIE-active molecules allows them to freely rotate and/or vibrate in nanofibers upon photoexcitation and thus significantly elevates the proportion of non-radiative energy dissipation, affording impressive heat-generating efficiency. Photothermal evaluation shows that the core-shell nanofibers with excellent durability can reach up to 22.36 % of photothermal conversion efficiency, which is 26-fold as the non-core-shell counterpart. Such a core-shell fiber can be used for photothermal textiles and solar steam generation induced by natural sunlight with green and carbon-zero emission.