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Visible light‐induced photopolymerization of an in situ macroporous sol–gel monolith
Author(s) -
Dulay Maria T.,
Choi Han Nim,
Zare Richard N.
Publication year - 2007
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.200700328
Subject(s) - monolith , photopolymer , photoinitiator , visible spectrum , photosensitizer , polyimide , cationic polymerization , monolithic hplc column , materials science , chromatography , chemistry , chemical engineering , polymer , photochemistry , catalysis , polymer chemistry , polymerization , high performance liquid chromatography , organic chemistry , layer (electronics) , monomer , optoelectronics , engineering
A one‐step, in situ , photopolymerization of a mixture of methacryloxypropyltrimethoxysilane in the presence of an acid catalyst, water, and toluene is accomplished in a 75 μm id polyimide‐coated capillary using visible light (460 nm) for a 15 min irradiation time. The mixture is a two‐component photosystem comprising Irgacure 784 photosensitizer and diphenyliodonium chloride photoinitiator. The visible photopolymerized sol–gel (vis‐PSG) column shows RP chromatographic behavior. The analytical potential of these columns is demonstrated with the isocratic separation of small, neutral alkyl phenyl ketones. Operational parameters, such as mobile phase composition, field strength, and column temperature were varied to assess how they affect the separation performance of the monolith.