Photocatalysis within Hyperbranched Polyethers with a Benzophenone Core

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• 作者：Lourdes Pastor-Pe&#x301 ; rez ; Emilie Barriau ; Holger Frey ; Julia Pe&#x301 ; rez-Prieto ; Salah-Eddine Stiriba
• 刊名：Journal of Organic Chemistry
• 出版年：2008
• 出版时间：June 20, 2008
• 年：2008
• 卷：73
• 期：12
• 页码：4680 - 4683
• 全文大小：185K
• 年卷期：v.73,no.12(June 20, 2008)
• ISSN：1520-6904

文摘

Quenching and product studies have been performed to demonstrate the suitability of hyperbranched polyethers with a tetrafunctionalized benzophenone core as photocatalysts. The triplet photosensitized transformation of an unsaturated diazo compound has been used as the model reaction. The polymer with highest molecular weight led to a similar product distribution even after several catalytic cycles, which evidences its excellent photostability under prolonged irradiation time. We attribute this to the stabilizing effect of the hyperbranched polymer shell.