Isabelle Roth, F. Simon, C. Bellmann
Sep 6, 2006
Citations
0
Influential Citations
16
Citations
Journal
Chemistry of Materials
Abstract
Nucleophilic aromatic substitution reactions of fluoronitro-substituted aromatic compounds with poly(vinylamine) (PVAm)/silica adsorbates were studied to equip silica particles with primary amino as well as several chromophoric groups. 4-Fluoronitrobenzene (1, 4-FNB), 2-fluoronitrobenzene (2, 2-FNB), 4-fluoro-3-nitroaniline (3, 4-FNA), N,N-dimethyl-4-fluoro-3-nitroaniline (4, 4-DMFNA), 1-fluoro-2,4-dinitrobenzene (5, Sangers reagent, FDNB), 1,5-difluoro-2,4-dinitrobenzene (6, DFDNB), 4-fluoro-3-nitroazobenzene (7, FNAzoB), N-(2‘,4‘-dinitrophenyl)-4-fluoro-3-nitroaniline (8, N-DNP-FNA), and 4-fluoro-3,4‘-dinitrostilbene (9, FDNstilbene) have been used as functionalization reagents. Various chromophoric functionalities could be readily synthesized on the silica surface by this elegant method. The degree of PVAm functionalization with chromophores was determined from the redissolved fraction of the functionalized polymer by means of UV/vis spectroscopy using model compounds as references. The surface structu...