Study of Interaction between NO Radicals and Martin鈥檚 Spirosilane by Means of IR Spectroscopy

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• 作者：E. L. Zins ; L. Krim ; H. Lenormand ; J.-P. Goddard ; L. Fensterbank
• 刊名：The Journal of Physical Chemistry A
• 出版年：2013
• 出版时间：April 25, 2013
• 年：2013
• 卷：117
• 期：16
• 页码：3296-3303
• 全文大小：293K
• 年卷期：v.117,no.16(April 25, 2013)
• ISSN：1520-5215

文摘

The matrix isolation method is used to record the IR spectrum of C₁₈H₈O₂F₁₂Si in the 4000鈥?00 cm^鈥? range. To gain an IR spectrum with a sufficient resolution, this technique was used with neon as the dilution medium at 5 K. The generated species were characterized by in situ fourier transform infrared (FT-IR) spectroscopy. Once the Martin鈥檚 spirosilane 1 (C₁₈H₈O₂F₁₂Si) was characterized, its reactivity toward NO was investigated under the same experimental conditions (i.e., using neon as a dilution medium at 5 K). In this case, the use of neon at very low temperature leads to the formation of a chemically inert matrix in which the species are trapped and isolated from one another, thus hindering consecutive reactions. As a consequence, intermediates can be observed. This approach allowed us to characterize the NO adduct, leading to the formation of 1-(NO). Concentration effects as well as annealing experiments were carried out. In addition to this experimental approach, products were identified by using reference spectra. Our results proved that, in the dilute phase, the reaction between 1 and NO radicals leads to the formation of an adduct. This stable species can further react with NO to form a more stable compound: 1-(NO)₂. This proves the ability of such species to trap NO.