School of Chemistry, University of Melbourne, Melbourne, VIC 3010, Australia.
Analyst. 2017 Jun 12;142(12):2100-2103. doi: 10.1039/c7an00398f.
The photoisomerisation of charged molecules in solution is probed directly using ion mobility mass spectrometry with electrospray ionisation. The technique is demonstrated using a prototype azoheteroarene cation in methanol. By scanning the wavelength of the excitation light while monitoring the photoisomer intensity a photoisomerisation action spectrum is generated, which, when compared with a conventional absorption spectrum, allows the relative photoisomerisation quantum yield to be determined across a range of wavelengths.
采用电喷雾电离离子淌度质谱直接探测溶液中带电荷分子的光异构化。该技术使用甲醇中的原型偶氮杂芳阳离子进行了演示。通过在监测光异构化强度的同时扫描激发光的波长，生成光异构化作用光谱，将其与常规吸收光谱进行比较，可以确定在一系列波长下的相对光异构化量子产率。
