Penelas, M.J.; Soler-Illia, G.J.A.A.; Levi, V.; Bordoni, A.V.; Wolosiuk, A. "Click-based thiol-ene photografting of COOH groups to SiO 2 nanoparticles: Strategies comparison" (2019) Colloids and Surfaces A: Physicochemical and Engineering Aspects. 562:61-70
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We present the study of the anchoring of carboxylic groups on SiO 2 nanoparticles from different approximations based on the photochemical radical thiol-ene addition (PRTEA) reaction: a photografting approach between mercaptosuccinic acid (MSA) and vinyl-modified SiO 2 nanoparticles and the post-grafting on the surface of silica colloids of the silane precursor 2-((2-(trimethoxysilyl)ethyl)thio)succinic acid (TMSMSA), obtained from the PRTEA. These synthetic strategies were compared with a widely common derivatization methodology based on the nucleophilic attack of surface-anchored amino groups with succinic anhydride. The successful functionalization of the colloidal silica was confirmed by infrared spectroscopy (FTIR), zeta potential at different pH and contact angle measurements. We found that although these three approaches were valid for −COOH immobilization, they had a noticeable impact on the dispersability and agglomeration of the colloidal suspension at the end of the synthesis. Scanning electron microscopy, dynamic light scattering (DLS) and fluorescence correlation spectroscopy (FCS) measurements indicated that the PRTEA photografting between MSA and vinyl-modified SiO 2 resulted in highly dispersed colloidal particles. On the other hand, the presence of surface −COOH groups was highly beneficial for redispersion of the colloidal material after lyophilization or freeze-drying procedures. © 2018 Elsevier B.V.


Documento: Artículo
Título:Click-based thiol-ene photografting of COOH groups to SiO 2 nanoparticles: Strategies comparison
Autor:Penelas, M.J.; Soler-Illia, G.J.A.A.; Levi, V.; Bordoni, A.V.; Wolosiuk, A.
Filiación:Gerencia Química – Centro Atómico Constituyentes – Comisión Nacional de Energía Atómica. CONICET, Av. Gral. Paz 1499, San Martín, Pcia, Buenos Aires, 1650, Argentina
Instituto de Nanosistemas, Universidad Nacional de San Martín, Av. 25 de Mayo 1021, B1650KNA-San Martín, Buenos Aires, Argentina
Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Biológica, Argentina- CONICET - Universidad de Buenos Aires, Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN), Buenos Aires, Argentina
Palabras clave:Carboxylic groups; Click-reactions; Colloids; Silica; Thiol-ene addition; Colloids; Contact angle; Dynamic light scattering; Fluorescence spectroscopy; Fourier transform infrared spectroscopy; Grafting (chemical); Scanning electron microscopy; Silica; Silica nanoparticles; Spectroscopic analysis; Carboxylic group; Click reaction; Colloidal suspensions; Fluorescence Correlation Spectroscopy; Mercaptosuccinic acids; Nucleophilic attack; Synthetic strategies; Thiol-ene additions; Suspensions (fluids); silane; silica nanoparticle; succinic anhydride; thiol; thiomalic acid; vinyl derivative; Article; click chemistry; contact angle; derivatization; fluorescence correlation spectroscopy; infrared spectroscopy; nucleophilicity; pH; photochemistry; photon correlation spectroscopy; priority journal; scanning electron microscopy; surface property; suspension; synthesis; zeta potential
Página de inicio:61
Página de fin:70
Título revista:Colloids and Surfaces A: Physicochemical and Engineering Aspects
Título revista abreviado:Colloids Surf. A Physicochem. Eng. Asp.
CAS:silane, 7803-62-5; succinic anhydride, 108-30-5; thiomalic acid, 70-49-5; vinyl derivative, 2669-89-8


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---------- APA ----------
Penelas, M.J., Soler-Illia, G.J.A.A., Levi, V., Bordoni, A.V. & Wolosiuk, A. (2019) . Click-based thiol-ene photografting of COOH groups to SiO 2 nanoparticles: Strategies comparison. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 562, 61-70.
---------- CHICAGO ----------
Penelas, M.J., Soler-Illia, G.J.A.A., Levi, V., Bordoni, A.V., Wolosiuk, A. "Click-based thiol-ene photografting of COOH groups to SiO 2 nanoparticles: Strategies comparison" . Colloids and Surfaces A: Physicochemical and Engineering Aspects 562 (2019) : 61-70.
---------- MLA ----------
Penelas, M.J., Soler-Illia, G.J.A.A., Levi, V., Bordoni, A.V., Wolosiuk, A. "Click-based thiol-ene photografting of COOH groups to SiO 2 nanoparticles: Strategies comparison" . Colloids and Surfaces A: Physicochemical and Engineering Aspects, vol. 562, 2019, pp. 61-70.
---------- VANCOUVER ----------
Penelas, M.J., Soler-Illia, G.J.A.A., Levi, V., Bordoni, A.V., Wolosiuk, A. Click-based thiol-ene photografting of COOH groups to SiO 2 nanoparticles: Strategies comparison. Colloids Surf. A Physicochem. Eng. Asp. 2019;562:61-70.