Abstract The one-colour resonant two-photon ionization (R2PI) spectrum of the 1-fluoronaphthalene (1FN) dimer has been studied in the wavelength range of 304 to 322 nm by using a supersonic molecular beam and time-of-flight mass spectrometry. Compared with the original band $0^0_0$ (at 313.8 nm) of the $S_1\leftarrow S_0$ transition of the 1FN monomer, a red-shifted band was observed in the 1FN dimer spectrum at about 315 nm with a relatively large linewidth, nearly 2 nm. Based on the consideration of inductive effect and ab initio calculations, this red-shifted band is assigned to the first electronic excited transition of the 1FN dimer. A possible geometric structure of the 1FN dimer is also obtained with calculations that the two 1FN molecules are combined through two hydrogen bonds which are formed between the hydrogen atom of a molecule and the fluorine atom of a neighbouring molecule. A time-dependent calculation was also carried out and the results are consistent with the experimental data.
Received: 11 December 2008
Revised: 04 May 2009
Accepted manuscript online:
PACS:
33.80.Eh
(Autoionization, photoionization, and photodetachment)
(Spectroscopy and geometrical structure of clusters)
Fund: Project
supported by the Doctoral Special Fund of Qufu Normal University of
China.
Cite this article:
Liu Ye-Chao(刘业超), Zhang Shu-Dong(张树东), Zhang Ming-Xia(张明霞), Sun Miao(孙淼), and Kong Xiang-He(孔祥和) One-colour resonant two-photon ionization spectrum of the 1-fluoronaphthalene dimer and ab initio calculation 2009 Chin. Phys. B 18 3865
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.