Absorption spectra of 1-methylnaphthalene, anthracene, pyrene, and perylene in the liquid phase

被引:1
作者
Katoh, Ryuzi [1 ]
Kubota, Haruyoshi [1 ]
Sugawara, Kazuma [1 ]
机构
[1] Nihon Univ, Coll Engn, Koriyama, Fukushima 9638642, Japan
关键词
Absorption spectra of molten aromatic liquids; Dimer formation; FLUORESCENCE-SPECTRA; PAIR FORMATION; IONIC LIQUIDS; EXCITED-STATE;
D O I
10.1016/j.cplett.2024.141263
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We studied absorption spectra of aromatic liquids to understand exitonic property and molecular configuration. We measured the absorption spectra of 1-methylnaphthalene liquid at room temperature, and of anthracene, pyrene, and perylene liquids in the molten state at just above their melting points. The absorption band positions were similar to those seen in the spectra obtained with the compounds in solution, indicating that the electronic structure as an isolated molecule is preserved to some extent in the liquid phase. For anthracene, pyrene, and perylene liquids, characteristic differences in the shapes of the spectra compared with the spectra of the compounds in solution were observed. In fact, absorbance in the shorter wavelength region of the absorption bands was pronounced in the spectra for the liquids, indicating that a sandwich -type dimer in the ground state coexist with isolated monomers in these liquids.
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页数:6
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