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Rapid Commun."],"published-print":{"date-parts":[[2020,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The use of conjugated polymer nanoparticles (CP NPs) of poly(9,9\u2010dioctylfluorene\u2010alt\u2010benzothiadiazole) and poly(9,9\u2010di\u2010<jats:italic>n<\/jats:italic>\u2010octylfluorenyl\u20102,7\u2010diyl) as efficient photoinitiator systems (PIS) of vinyl polymerization in water is reported herein. CP NPs are biocompatible, excitable with blue commercial LEDs and, unlike visible light Type II PIS, do not need co\u2010initiators to trigger a monomer chain reaction. CP NPs photoinitiate polymerization of a variety of acrylic monomers with initiation rates comparable to those observed for well\u2010known Type II PIS. Given the extraordinarily large molar absorption coefficients of CP NPs (\u224810<jats:sup>8<\/jats:sup> <jats:sc>m<\/jats:sc><jats:sup>\u20101<\/jats:sup> cm<jats:sup>\u20101<\/jats:sup>) very low particle concentration is required for effective polymerization. Additionally, CP NPs behave as conventional macrophotoinitiators significantly reducing contamination risks due to leaching of low molecular weight byproducts. These combined features make CP NPs PIS suitable to synthesize polymeric materials for many healthcare and biomedical applications including drug delivery, tissue engineering, prosthetic implants, and food\/medicine packaging. These CP NPs PIS are also used to synthesize nano\u2010hydrogels with a relatively narrow and controlled size distribution in the absence of surfactants. It is proposed that polymerization is initiated at the CP NPs surface by photogenerated free polarons, in close analogy to the mechanism previously described for PIS based on inorganic semiconductor NPs.<\/jats:p>","DOI":"10.1002\/marc.201900601","type":"journal-article","created":{"date-parts":[[2020,2,13]],"date-time":"2020-02-13T16:00:50Z","timestamp":1581609650000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Conjugated Polymer Nanoparticles as Unique Coinitiator\u2010Free, Water\u2010Soluble, Visible\u2010Light Photoinitiators of Vinyl Polymerization"],"prefix":"10.1002","volume":"41","author":[{"given":"Antonela","family":"Gallastegui","sequence":"first","affiliation":[{"name":"Instituto de Investigaciones en Tecnolog\u00edas Energ\u00e9ticas y Materiales Avanzados (IITEMA) Universidad Nacional de R\u00edo Cuarto (UNRC) and Consejo Nacional de Investigaciones Cient\u00edficas y Tecnol\u00f3gicas (CONICET) Campus Universitario  5800 R\u00edo Cuarto Argentina"}]},{"given":"Ramiro M.","family":"Spada","sequence":"additional","affiliation":[{"name":"Instituto de Investigaciones en Tecnolog\u00edas Energ\u00e9ticas y Materiales Avanzados (IITEMA) Universidad Nacional de R\u00edo Cuarto (UNRC) and Consejo Nacional de Investigaciones Cient\u00edficas y Tecnol\u00f3gicas (CONICET) Campus Universitario  5800 R\u00edo Cuarto Argentina"}]},{"given":"Gonzalo","family":"Cagnetta","sequence":"additional","affiliation":[{"name":"Instituto de Investigaciones en Tecnolog\u00edas Energ\u00e9ticas y Materiales Avanzados (IITEMA) Universidad Nacional de R\u00edo Cuarto (UNRC) and Consejo Nacional de Investigaciones Cient\u00edficas y Tecnol\u00f3gicas (CONICET) Campus Universitario  5800 R\u00edo Cuarto Argentina"}]},{"given":"Rodrigo A.","family":"Ponzio","sequence":"additional","affiliation":[{"name":"Instituto de Investigaciones en Tecnolog\u00edas Energ\u00e9ticas y Materiales Avanzados (IITEMA) Universidad Nacional de R\u00edo Cuarto (UNRC) and Consejo Nacional de Investigaciones Cient\u00edficas y Tecnol\u00f3gicas (CONICET) Campus Universitario  5800 R\u00edo Cuarto Argentina"}]},{"given":"Sol R.","family":"Mart\u00ednez","sequence":"additional","affiliation":[{"name":"Instituto de Investigaciones en Tecnolog\u00edas Energ\u00e9ticas y Materiales Avanzados (IITEMA) Universidad Nacional de R\u00edo Cuarto (UNRC) and Consejo Nacional de Investigaciones Cient\u00edficas y Tecnol\u00f3gicas (CONICET) Campus Universitario  5800 R\u00edo Cuarto Argentina"}]},{"given":"Carlos M.","family":"Previtali","sequence":"additional","affiliation":[{"name":"Instituto de Investigaciones en Tecnolog\u00edas Energ\u00e9ticas y Materiales Avanzados (IITEMA) Universidad Nacional de R\u00edo Cuarto (UNRC) and Consejo Nacional de Investigaciones Cient\u00edficas y Tecnol\u00f3gicas (CONICET) Campus Universitario  5800 R\u00edo Cuarto Argentina"}]},{"given":"Mar\u00eda Lorena","family":"G\u00f3mez","sequence":"additional","affiliation":[{"name":"Instituto de Investigaciones en Tecnolog\u00edas Energ\u00e9ticas y Materiales Avanzados (IITEMA) Universidad Nacional de R\u00edo Cuarto (UNRC) and Consejo Nacional de Investigaciones Cient\u00edficas y Tecnol\u00f3gicas (CONICET) Campus Universitario  5800 R\u00edo Cuarto Argentina"}]},{"given":"Rodrigo E.","family":"Palacios","sequence":"additional","affiliation":[{"name":"Instituto de Investigaciones en Tecnolog\u00edas Energ\u00e9ticas y Materiales Avanzados (IITEMA) Universidad Nacional de R\u00edo Cuarto (UNRC) and Consejo Nacional de Investigaciones Cient\u00edficas y Tecnol\u00f3gicas (CONICET) Campus Universitario  5800 R\u00edo Cuarto Argentina"}]},{"given":"Carlos A.","family":"Chesta","sequence":"additional","affiliation":[{"name":"Instituto de Investigaciones en Tecnolog\u00edas Energ\u00e9ticas y Materiales Avanzados (IITEMA) Universidad Nacional de R\u00edo Cuarto (UNRC) and Consejo Nacional de Investigaciones Cient\u00edficas y Tecnol\u00f3gicas (CONICET) Campus Universitario  5800 R\u00edo Cuarto Argentina"}]}],"member":"311","published-online":{"date-parts":[[2020,2,13]]},"reference":[{"key":"e_1_2_5_1_1","first-page":"105","volume":"5","author":"Vitale A.","year":"2017","journal-title":"Rev. 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