Wavelength-Selective Caged Surfaces: How Many Functional Levels Are Possible? Articles uri icon

publication date

  • March 2011

start page

  • 5380

end page

  • 5388

issue

  • 14

volume

  • 133

International Standard Serial Number (ISSN)

  • 0002-7863

Electronic International Standard Serial Number (EISSN)

  • 1520-5126

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.

subjects

  • Chemistry
  • Materials science and engineering