Abstract
Through 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.