Infrared spectra of free radicals and protonated species produced in para-hydrogen matrices
Infrared spectra of free radicals and protonated species produced in para-hydrogen matrices
复制标题
DOI：
10.1039/c3cp54184c
复制
发表时间：
2014-01-01
影响因子：
3.3
通讯作者：
Lee, Yuan-Pern
中科院分区：
文献类型：
--
作者：
Bahou, Mohammed;Das, Prasanta;Lee, Yuan-Pern
量子固体仲氢（p-H-2）已成为基质分离实验的新宿主。在几个独特的特征中，减弱的笼效应使得能够通过分子与原子或自由基的原位光解或双分子反应产生自由基，所述原子或自由基在光照射时从其前体原位产生。许多不可能在惰性气体基质中产生的自由基可以在固体p-H-2中容易地产生。此外，质子化的物种可以产生后，电子轰击的p-H-2含有一小部分的前体在沉积过程中。应用该新技术制备质子化多环芳烃（PAH）及其中性对应物，显示了其优于其他方法的优势。使用p-H-2作为基质主体的技术为自由基和不稳定物种的制备及其光谱表征开辟了许多可能性。关于p-H-2矩阵的许多新的应用领域和基本理解有待进一步探索。
The quantum solid para-hydrogen (p-H-2) has emerged as a new host for matrix isolation experiments. Among several unique characteristics, the diminished cage effect enables the possibility of producing free radicals via either photolysis in situ or bimolecular reactions of molecules with atoms or free radicals that are produced in situ from their precursors upon photo-irradiation. Many free radicals that are unlikely to be produced in noble-gas matrices can be produced readily in solid p-H-2. In addition, protonated species can be produced upon electron bombardment of p-H-2 containing a small proportion of the precursor during deposition. The application of this novel technique to generate protonated polycyclic aromatic hydrocarbons (PAH) and their neutral counterparts demonstrates its superiority over other methods. The technique of using p-H-2 as a matrix host has opened up many possibilities for the preparation of free radicals and unstable species and their spectral characterization. Many new areas of applications and fundamental understanding concerning the p-H-2 matrix await further exploration.