浙江大学冯建东团队开发了水-固体界面质子传输路径的动态光学可视化策略。相关研究成果发表在2021年11月9日出版的国际学术期刊《德国应用化学》。

探测质子输运对于细胞输运、表面催化和燃料电池至关重要。传统的质子传输测量依赖于电化学电导率方法的使用，该方法不能在纳米尺度上直接观察到质子传输路径。发展新的实验技术来时空解析质子输运是一个迫切的需求。

该文中，基于水质子通量到空间分辨荧光信号的一般转换，研究人员光学地可视化了质子通过纳米孔和亲水界面的传输。研究人员观察到一种新的现象，即由于横向传输，荧光强度在负电压下增加。由于光学成像的时间分辨率，该技术进一步增强了质子传输动力学的分析能力。

研究工作提供了一个新的工具箱，可以为未来质子输运现象的研究提供帮助。

附：英文原文

Title: Dynamic optical visualization of proton transport pathways at water-solid interfaces

Author: Jinmei Yang, Yuxian Lu, Lei Jin, Chunxiao Zhao, Yuang Chen, Yang Xu, Fanfan Chen, Jiandong Feng

Issue&Volume: 2021-11-09

Abstract: Probing proton transport is of vital importance for cellular transport, surface catalysis and fuel cells. Conventional proton transport measurements rely on the use of electrochemical conductivity approach which does not allow for direct visualization of proton transport pathways at the nanoscale. Development of novel experimental techniques to spatiotemporally resolve proton transport is in high demand. Here, building upon a general conversion of aqueous proton flux into spatially resolved fluorescence signals, we optically visualize proton transport through nanopores and along the hydrophilic interfaces. We observed a novel phenomenon that the fluorescence intensity increased at negative voltage due to lateral transport. Thanks to the temporal resolution of optical imaging, our technique further empowers the analysis of proton transport dynamics. Our work offers a new toolbox that may shed light on future examination of proton transport phenomena.

DOI: 10.1002/anie.202112150

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202112150