Preparation of fluorescent wood based on a novel flavonoid skeleton fluorescent probe for naked eye detection of dichloromethane, trichloromethane, and carbon tetrachloride

Chloromethane (dichloromethane, trichloromethane, and carbon tetrachloride), as a widely used organic solvent, has potential environmental hazards and health risks that cannot be ignored. Therefore, it is urgent to strictly monitor and take preventive measures for chloromethane. In this paper, we introduced triphenylamine groups onto the skeleton of flavonols and constructed a novel flavonoid skeleton fluorescent probe (FAC) that can be used to distinguish chloromethane. The fluorescence emission spectra of FAC in different proportions of chloromethane can exhibit a regular shift from yellow to blue, thereby achieving adjustability of fluorescence and distinguishing three chloromethane compounds by visual inspection. The detection mechanism was verified by single-crystal X-ray diffractometer calculation analysis. The test results show that FAC has the highest quantum yield in CH 2 Cl 2 , reaching 99.50 %. The quantum yields in CHCl 3 and CCl 4 were 86.87 % and 75.09 %, respectively. Moreover, based on the fluorescence performance of FAC, fluorescent wood (FAC-DBW) with detection capability was prepared. Covering FAC-DBW flakes on UV-LED chips, yellow fluorescent (540 nm), green fluorescent (508 nm), and blue fluorescent (420 nm) LEDs can be prepared when exposed to CH 2 Cl 2 , CHCl 3 , and CCl 4 vapors. In addition, FAC-DBW is biodegradable, and its design conforms to the concept of sustainable development.