Roth, Isabelle; Simon, Frank; Bellmann, Cornelia; Seifert, Andreas; Spange, Stefan published the artcile< Fabrication of Silica Particles Functionalized with Chromophores and Amino Groups Using Synergism of Poly(vinylamine) Adsorption and Nucleophilic Aromatic Substitution with Fluoroaromatics>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is chromophore amino functionalization silica nucleophilic substitution fluoro nitro benzene.
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 structures of the chromophores fixed on polymer-modified silica particles were studied using XPS and UV/vis spectroscopy. Brunauer-Emmett-Teller (BET) measurements and XPS studies suggest that the chromophores introduced in the PVAm layer on silica are differently distributed in the adsorbed PVAm layers. The vertical distribution of the chromophore in the PVAm layer depends on the reactivity of the fluoroarom. The more reactive the fluoroarom., the more unaffected remains the former pore-size distribution of silica. Changes of the surface charge were investigated by means of electrokinetic measurements.
Chemistry of Materials published new progress about Adsorption. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics