The understanding of thermocapillary convection is important in both fundamental and industrial aspects. However, efficient tools that can provide dynamic details of the convective flows are still lacking. Here, we discovered a unique phenomenon of photoinduced fluorogenic shift of HDPI derivatives in chloroform and utilized this trait to map the temperature field and capillary flow on the surface of or inside volatile chloroform with a high spatial resolution and a long observation window. By inducing a proper co‐imaging agent that enhanced the fluorescence contrast via generating more distinguishable chromaticity, the fluorescence‐based method exhibited further enhanced imaging resolution and elongated observation time, facilitating the continuous monitoring of temperature field and capillary flow. This work presents a powerful tool to study the behaviors of fluid (thermo‐)dynamics.

中文翻译：

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用于绘制挥发性溶剂表面温度场和毛细管流的荧光显像剂


对热毛细管对流的理解在基础和工业方面都很重要。然而，仍然缺乏能够提供对流动态细节的有效工具。在这里，我们发现了氯仿中 HDPI 衍生物光诱导荧光转移的独特现象，并利用这一特性绘制了挥发性氯仿表面或内部的温度场和毛细管流，具有高空间分辨率和较长的观察窗口。通过诱导适当的共成像剂，通过产生更可区分的色度来增强荧光对比度，基于荧光的方法进一步提高了成像分辨率并延长了观察时间，有助于连续监测温度场和毛细管流。这项工作为研究流体（热）动力学的行为提供了一个强大的工具。