Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 16, Issue 6, Pages 2200-2210Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cp54184c
Keywords
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Funding
- National Science Council of Taiwan [NSC102-2745-M-009-001-ASP]
- Ministry of Education, Taiwan (ATU Plan'' of National Chiao Tung University)
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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.
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