Photocatalyst: nanosilver/silver chloride surface plasma composite;
Substrate: p-fluorotoluene; Halogenator: potassium chloride;
(1) 50 ml of water, 7 g of sodium chloride and 2.5 ml of hydrochloric acid (mass fraction 35%) were added in a photocatalytic reactor, respectively, and dissolved with stirring;
(2) then add 0.3 g of nanosilver/silver chloride as a photocatalyst (nanosilver loading 8.5 mol%) and 0.05 g of tetrabutylammonium chloride as a phase-transfer catalyst, and finally add 15 ml of p-fluorotoluene; the loading is the molar amount of nanoprecious metals as a molar percentage of the total amount of nanoprecious metal/semiconductor surface plasmonic composite.
(3) Under strong magnetic stirring, then turn on 300W xenon lamp irradiation, and react for 5h at room temperature;
(4) Filtering to recover the catalyst, separating out the organic phase and recycling the aqueous phase for reuse. Samples were analyzed by GS, the conversion rate of p-fluorotoluene was 36%, and no polychlorinated products were detected. Distillation to collect 180.5-182 fraction, got 4-fluorobenzyl chloride, yield 89%.
