High Optical Transmission Amphiphobic Surfaces; and Methods of Forming Them

Abstract

Described are substrates having an amhiphobic surface coating. the surface coating comprising a Metal-Organic Framework (MOF) film wherein: (i) a first surface of the MOF film is bonded to the substrate: (ii) a second surface of the MOF film is an outer surface, functionalized with a plurality of surface functionalization groups; wherein: the MOF film comprises a MOF, the MOF having: metal ions selected from ions of Zr, Al, Fe, Cr and Ti; and multivalent linker groups having a structure according to formula (I): wherein A is a C5-26 aryl group, optionally substituted with one or more groups selected from amino, halo, hydroxyl, nitro, azido, and C2-4 alkynyl and cyclooctynyl; L is a ligation group, each independently selected from carboxyl, hydroxyl and 5- or 6-membered heteroaryl having from 1 to 3 nitrogen heteroatoms; and n is an integer number in the range 2 to 6; the surface functionalization groups are covalently bonded to the second surface of the MOF film and are independently selected from C1-40 alkyl groups optionally substituted with halo; C5-20 carboaryl groups optionally substituted with C1-6 alkyl and/or halo; C5-20 cycloalkyl groups optionally substituted with C1-6 alkyl and/or halo; silyl-C1-40 alkyl groups optionally substituted with halo; and polydimethylsiloxane oligomers having from 5 to 50 repeating units; the MOF film having an average thickness in the range 50-500 nm; and the surface coating having an optical transmission of greater than 75% to light having a wavelength in the range 400-700 nm. Also described are methods of forming such coatings using a layer-by-layer deposition process.

Dependencies are inferred from the claim text.