dorsal/arxiv
View SchemaUV spectra of benzene isotopomers and dimers in helium nanodroplets
| Authors | Roman Schmied, Pierre Carcabal, Adriaan M. Dokter, Vincent P. A. Lonij, Kevin K. Lehmann, Giacinto Scoles |
|---|---|
| Categories | |
| ArXiv ID | physics/0407122 |
| URL | https://arxiv.org/abs/physics/0407122 |
| DOI | 10.1063/1.1767515 |
| Journal | Journal of Chemical Physics 121(6): 2701-2710 (2004) |
Abstract
We report spectra of various benzene isotopomers and their dimers in helium nanodroplets in the region of the first Herzberg-Teller allowed vibronic transition 610 1B2u<-1A1g (the A00 transition) at ~260 nm. Excitation spectra have been recorded using both beam depletion detection and laser-induced fluorescence. Unlike for many larger aromatic molecules, the monomer spectra consist of a single "zero-phonon" line, blueshifted by ~30 cm-1 from the gas phase position. Rotational band simulations show that the moments of inertia of C6H6 in the nanodroplets are at least 6 times larger than in the gas phase. The dimer spectra present the same vibronic fine structure (though modestly compressed) as previously observed in the gas phase. The fluorescence lifetime and quantum yield of the dimer are found to be equal to those of the monomer, implying substantial inhibition of excimer formation in the dimer in helium.
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"abstract": "We report spectra of various benzene isotopomers and their dimers in helium\nnanodroplets in the region of the first Herzberg-Teller allowed vibronic\ntransition 610 1B2u\u003c-1A1g (the A00 transition) at ~260 nm. Excitation spectra\nhave been recorded using both beam depletion detection and laser-induced\nfluorescence. Unlike for many larger aromatic molecules, the monomer spectra\nconsist of a single \"zero-phonon\" line, blueshifted by ~30 cm-1 from the gas\nphase position. Rotational band simulations show that the moments of inertia of\nC6H6 in the nanodroplets are at least 6 times larger than in the gas phase. The\ndimer spectra present the same vibronic fine structure (though modestly\ncompressed) as previously observed in the gas phase. The fluorescence lifetime\nand quantum yield of the dimer are found to be equal to those of the monomer,\nimplying substantial inhibition of excimer formation in the dimer in helium.",
"arxiv_id": "physics/0407122",
"authors": [
"Roman Schmied",
"Pierre Carcabal",
"Adriaan M. Dokter",
"Vincent P. A. Lonij",
"Kevin K. Lehmann",
"Giacinto Scoles"
],
"categories": [
"physics.chem-ph",
"physics.atm-clus"
],
"doi": "10.1063/1.1767515",
"journal_ref": "Journal of Chemical Physics 121(6): 2701-2710 (2004)",
"title": "UV spectra of benzene isotopomers and dimers in helium nanodroplets",
"url": "https://arxiv.org/abs/physics/0407122"
},
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