Investigation of optically generated transient electronic defects and protonic transport in hydrogen-bonded molecular solids. Isomorphs of potassium dihydrogen phosphate
✍ Scribed by Jeffrey E. Davis; Robert S. Hughes Jr.; Howard W.H. Lee
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 615 KB
- Volume
- 207
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
Recent results are reported from our study of a new class of transient electronic defects generated with ultraviolet (UV) photons in hydrogen-bonded molecular solids represented by isomorphs of dihydrogen phosphate. At room temperature, the defect forms 1.6 + 0.4 ps after UV two-photon excitation, decays nonexponentially in G 20 s, and absorbs from the UV to the near-IR. The defect is identified as a HP& radical and supports proposed formation and decay mechanisms based on protonic transport. These findings also call into question interpretations of ionizing radiation results.