Effect of shortened alkyl chain on photothermal properties of D-A-D conjugated small molecules

AbstractThrough the study of the molecular formula of p1-AQM2AF, it is found that 9-methylenedecane, as the electron donor system, has strong electron donor capacity, but due to its huge steric hindrance, the p1-AQM2AF molecule may be seriously distorted, resulting in the reduction of the fluorescence quantum efficiency of p1-AQM2AF due to the angular momentum energy loss during the electron transmission process. Therefore, we have made a bold guess, The length of alkyl chain may also be one of the factors affecting the fluorescence efficiency of D-A-D conjugated small molecules. We converted the 9-methylene-19decane originally attached to the molecule into 3-methylenenonane, and explored its influence on the fluorescence molecule by reducing the length of the donor alkyl chain.Keywords: D-A-D conjugated compoundconjugated compounds Additional informationFundingThis study was supported by the National Natural Science Foundation of China (21874078, 22074072, 22274083), the Innovation and Development Joint Fund of Natural Science Foundation of Shandong Province (ZR2022LZY022), the Science and Technology Planing Project of South District of Qingdao City (2022-4-005-YY), the Exploration project of the State Key Laboratory of Bio-Fibers and Eco-Textiles of Qingdao University (TSKT202101), and the High Level Discipline Project of Shandong Province.