Siiskonen Antti, Vesamäki Sami, Priimagi Arri
Smart Photonic Materials, Faculty of Engineering and Natural Sciences, Tampere University, Korkeakoulunkatu 3, FI-33720 Tampere, Finland.
Beilstein J Org Chem. 2025 Jul 28;21:1528-1534. doi: 10.3762/bjoc.21.115. eCollection 2025.
Azobenzenes can be protonated at one of the azo nitrogen atoms, leading to significant changes in their absorption and photochemical properties. While azobenzene protonation has been recently used as a tool in photoswitching studies, the factors influencing protonation itself have received little attention. Here, we report a strong temperature dependence of azobenzene protonation in 1,2-dichloroethane and highlight its potential for temperature sensing applications. Density functional theory calculations were performed to support our findings and to investigate the mechanisms of azobenzene-acid interactions, aiming to guide the design of azobenzene-based temperature sensors in future research.
偶氮苯可以在其中一个偶氮氮原子处发生质子化，从而导致其吸收和光化学性质发生显著变化。虽然偶氮苯质子化最近已被用作光开关研究中的一种工具，但影响质子化本身的因素却很少受到关注。在此，我们报道了偶氮苯在1,2 - 二氯乙烷中的质子化具有强烈的温度依赖性，并强调了其在温度传感应用中的潜力。进行了密度泛函理论计算以支持我们的发现，并研究偶氮苯 - 酸相互作用的机制，旨在为未来研究中基于偶氮苯的温度传感器的设计提供指导。
