Dependence of the laser two-photon ionization signal of anthracene on the electron mobility and the excess energy in non-polar solvents
✍ Scribed by Teiichiro Ogawa; Miki Sato; Makoto Tachibana; Kazuhiko Ideta; Takanori Inoue; Keiji Nakashima
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 431 KB
- Volume
- 299
- Category
- Article
- ISSN
- 0003-2670
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✦ Synopsis
The photocurrent and photoionization charge of anthracene in various non-polar solvents have been measured under the thirdharmonics of a Nd-YAG laser excitation. They are quadratically proportional to the laser pulse energy, though those of water are cubically proportional to them. Anthracene exhibited a larger signal in those solvents in which both the electron mobility and the excess energy are large. Such solvents offered a higher sensitivity for the photoionization technique. Degassing showed only a minor effect. The detection limits were 14 ng/dm' (ppt) in hexane and 3.0 ng/dm' (ppt) in 2,2,4&methylpentane.