title: Wavelength-selective caged surfaces: how many functional levels are possible?
abstract: The possibility of wavelength-selective cleavage of seven photolabile caging groups from different families has been studied. Amine-, thiol-, and carboxylic-terminated organosilanes were caged with o-nitrobenzyl (NVOC, NPPOC), benzoin (BNZ), (coumarin-4-yl)methyl (DEACM), 7-nitroindoline (DNI, BNI), and p-hydroxyphenacyl (pHP) derivatives. Caged surfaces modified with the different chromophores were prepared, and their photosensitivity at selected wavelengths was quantified. Different pairs, trios, and quartets of chromophore combinations with wavelength-selective photoresponse were identified. Our results show, for the first time, the possibility of generating surfaces with up to four different and independently addressable functional levels. In addition, this manuscript presents the first systematic comparison of the photolytic properties of different photolabile groups under different irradiation conditions.
authors.affiliation: Max-Planck-Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany.
authors.forename: Verónica
authors.initials: V
authors.lastname: San Miguel
authors.forename: Christian G
authors.initials: CG
authors.lastname: Bochet
authors.forename: Aránzazu
authors.initials: A
authors.lastname: del Campo
mesh_terms: D010782:Photolysis; D012821:Silanes / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D012821:Silanes