A Water-Compatible NHC-Borane: Photopolymerizations in Water and Rate Constants for Elementary Radical Reactions

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• 作者：Mohamad-Ali Tehfe ; Julien Monot ; Max Malacria ; Louis Fensterbank ; Jean-Pierre Fouassier ; Dennis P. Curran ; Emmanuel Lac么te ; Jacques Lalev茅e
• 刊名：ACS Macro Letters
• 出版年：2012
• 出版时间：January 17, 2012
• 年：2012
• 卷：1
• 期：1
• 页码：92-95
• 全文大小：215K
• 年卷期：v.1,no.1(January 17, 2012)
• ISSN：2161-1653

文摘

Rate constants for important elementary reactions of 2,4-dimethyl-1,2,4-triazol-3-ylidene borane (1) and its derived boryl radical have been measured in the presence and absence of water. Reactions including H-abstraction by tBuO^{鈥?/sup>, and onward reactions of the derived radical with methyl acrylate (addition), iodopropane (halogen abstraction), and an iodonium salt (oxidation) are unaffected by the presence of a high concentration (1.5 M) of water. Extending these results, borane (1) has been found to be an efficient new co-initiator for the visible light photopolymerization of monomers in the presence of both air and water.}