An ambiphilic thiol that couples an electron-withdrawing meta-fluorine with a strongly electron-donating para-methoxy group, affording a high nucleophilicity (pKa 6.4) and a planar π-system ideal for orthogonal reactivity. Applications include:
Chemoselective thiol–yne hydrothiolation: the electron-rich aryl-thiyl radical adds regioselectively to terminal alkynes under visible-light photocatalysis, furnishing anti-Markovnikov vinyl sulfides in 91–98 % yield for agrochemical intermediates.
High-κ low-k hybrid dielectrics: self-assembled monolayers on SiO₂ exhibit a dielectric constant of 4.2 and leakage current <10⁻⁸ A cm⁻² at 1 MV cm⁻¹, enabling sub-10 nm organic field-effect transistor gate stacks.
Redox-active metal chelation: the soft sulfur and hard oxygen donors form a tridentate F,O,S-binding pocket that extracts Pd(II) from spent catalysts (log K = 19.7) and allows electrochemical stripping recovery at 0.34 V vs Ag/AgCl.
Photoresist adhesion promoter: the catechol-like methoxy-fluoro pattern boosts adhesion to copper lines by 40 %, reducing undercut in 248 nm KrF lithography for advanced packaging.
Fragrance precursor: enzymatic oxidation with laccase generates the corresponding disulfide, a long-lasting green tea odorant with low odour threshold (0.03 ng L⁻¹) used in fine perfumery.
Store under nitrogen at 2–8 °C, protected from light and peroxides to avoid disulfide formation.
