“…Dynarowicz-atka and coworkers systematically investigated the monolayer behavior of FnHm with various degrees of fl uorination 33 37 . Recently, other types of fl uorinated compounds such as long-chain alcohols CF 3 CF 2 n 1 CH 2 m OH, FnHmOH 16, 38 41 , carboxylic acids CF 3 CF 2 n 1 CH 2 m COOH, FnHmCOOH 42 46 , perfluorinated carboxylic acids CF 3 CF 2 n 1 COOH, FnCOOH 47 50 , catanionic surfactants synthesized by equimolar mixing of perfl uorinated and hydrogenated compounds 51 56 , and hybrid-type surfactants covalently combining F-chains with H-moieties 57,58 have been reported.…”