化学
偶氮苯
超分子化学
环糊精
水溶液
化学计量学
圆二色性
组合化学
分子
光化学
有机化学
结晶学
作者
Jorge Royes,Camille Courtine,Carlos Lorenzo,Nancy Lauth‐de Viguerie,Anne‐Françoise Mingotaud,Véronique Pimienta
标识
DOI:10.1021/acs.joc.0c00461
摘要
Hydrophilic host–guest complexes, consisting of water-soluble azobenzene and α-, β-, or γ-cyclodextrins, have been proposed as a model to study supramolecular photoresponsive systems in aqueous environments through a full spectrometric approach combined with a simulation and data fitting methodology. Various essential and complementary spectroscopic techniques have been used: circular dichroism to determine whether the complex is formed or not, NMR for the stoichiometry elucidation, and UV–visible spectrophotometry to obtain the association equilibrium constant of each complex and the quantum yield for each photochemical process. A step-by-step fitting procedure is presented, which enables the determination of all thermodynamic and photokinetic parameters. A sequential methodology is applied to dissipate all uncertainties on the variability of the results and to develop a relevant and reliable protocol applicable to other types of complexes. The proposed procedure has thus been shown to be very robust and largely applicable to other photoresponsive host–guest systems.
科研通智能强力驱动
Strongly Powered by AbleSci AI