Formation of Aromatic Structures from Chain Hydrocarbons in Electrical Discharges: Absorption and Fluorescence Study of C<sub>11</sub>H<sub>9</sub><sup>+</sup> and C<sub>11</sub>H<sub>9</sub><sup>•</sup> Isomers in Neon Matrices
作者:Adam Nagy、Jan Fulara、John P. Maier
DOI:10.1021/ja206522s
日期:2011.12.14
4-hexadiyne diluted in helium in a hot-cathode discharge source. The mass-selected ions were codeposited with neon at 6 K and investigated by electronic absorption spectroscopy. This reveals that fused-ring species are readily formed from an acyclic precursor in such a source. After photobleaching of matrices containing C(11)H(9)(+), neutral C(11)H(9)(•) radicals were also characterized. Assignment of the observed
一组芳烃(苯乙炔、茚和萘阳离子和 C(11)H(9)(+) 异构体)是由 2,4-己二炔在热阴极放电源中用氦气稀释而成的。质量选择的离子在 6 K 下与氖共沉积,并通过电子吸收光谱进行研究。这表明稠环物质很容易由这种来源的无环前体形成。在对包含 C(11)H(9)(+) 的矩阵进行光漂白后,还对中性 C(11)H(9)(•) 自由基进行了表征。使用其他前体、荧光测量、时间相关密度泛函和二阶近似耦合簇计算的实验给出并支持了观察到的跃迁到不同 m/z = 141 阳离子异构体和相应的中性异构体的分配。