Synchrotron radiation studies of gas phase molecules; from hydrogen to DNA sugars
(2008)- Abstract
- This thesis summarises experimental results on the molecular spectroscopy
of gas phase molecules excited by synchrotron radiation in the VUV and soft
X-ray regions. We have used three different detection techniques, photon in-
duced fluorescence spectroscopy, photoionisation mass spectroscopy and near
edge X-ray absorption fine structure spectroscopy to study molecular deu-
terium, hydrogen sulphide, ammonia, methanol, pyridine, pyridazine, pyrim-
idine, pyrazine, s-triazine, and 2-deoxy-D-ribose, the last one also known as
the DNA sugar. Out of this variety of techniques and molecules we have
shown that: (1) high resolution dispersed fluorescence allows us to... (More) - This thesis summarises experimental results on the molecular spectroscopy
of gas phase molecules excited by synchrotron radiation in the VUV and soft
X-ray regions. We have used three different detection techniques, photon in-
duced fluorescence spectroscopy, photoionisation mass spectroscopy and near
edge X-ray absorption fine structure spectroscopy to study molecular deu-
terium, hydrogen sulphide, ammonia, methanol, pyridine, pyridazine, pyrim-
idine, pyrazine, s-triazine, and 2-deoxy-D-ribose, the last one also known as
the DNA sugar. Out of this variety of techniques and molecules we have
shown that: (1) high resolution dispersed fluorescence allows us to identify
vibrational and rotational bands in molecular deuterium, as well as to esti-
mate the predissociation probability of the same molecule [paper I]; (2) the
main species fluorescing after core excitation of methane, ammonia [paper
III], hydrogen sulphide [paper II], pyridine, pyrimidine and s-triazine is H
Balmer α, followed by fluorescence from ionised species, molecular bands and
Balmer β, γ , δ; (3) the Rydberg enhancement seen in fluorescence measure-
ments of water [Melero et al. PRL 96 (2006) 063003], corroborated later in
H2 S [paper II], N H3 [paper III] and C H4 [paper III] and postulated as gen-
eral behaviour for molecules formed by low-Z atoms, is also seen in larger
organic cyclic molecules, e.g. azabenzenes; (4) when dissociative ionisation
of pyridine, pyridazine, pyrimidine, pyrazine, s-triazine and 2-deoxy-D-ribose
occurs, concerted bond rearrangement and nuclear motion takes place as op-
posed to stepwise dissociation [papers V and VI]. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1155877
- author
- Vall-llosera, Gemma LU
- supervisor
- opponent
-
- Sorensen, Stacey, Lunds Universitet
- publishing date
- 2008
- type
- Thesis
- publication status
- published
- subject
- pages
- 149 pages
- publisher
- KTH
- defense location
- Albanova, Stockholm
- defense date
- 2008-03-13 10:15:00
- ISBN
- 978-91-7178-852-8
- language
- English
- LU publication?
- no
- id
- 1e0d2eec-fbe8-481c-a9f8-f250f7772e6d (old id 1155877)
- date added to LUP
- 2016-04-04 10:02:59
- date last changed
- 2020-05-28 10:28:22
@phdthesis{1e0d2eec-fbe8-481c-a9f8-f250f7772e6d, abstract = {{This thesis summarises experimental results on the molecular spectroscopy <br/><br> of gas phase molecules excited by synchrotron radiation in the VUV and soft <br/><br> X-ray regions. We have used three different detection techniques, photon in- <br/><br> duced fluorescence spectroscopy, photoionisation mass spectroscopy and near <br/><br> edge X-ray absorption fine structure spectroscopy to study molecular deu- <br/><br> terium, hydrogen sulphide, ammonia, methanol, pyridine, pyridazine, pyrim- <br/><br> idine, pyrazine, s-triazine, and 2-deoxy-D-ribose, the last one also known as <br/><br> the DNA sugar. Out of this variety of techniques and molecules we have <br/><br> shown that: (1) high resolution dispersed fluorescence allows us to identify <br/><br> vibrational and rotational bands in molecular deuterium, as well as to esti- <br/><br> mate the predissociation probability of the same molecule [paper I]; (2) the <br/><br> main species fluorescing after core excitation of methane, ammonia [paper <br/><br> III], hydrogen sulphide [paper II], pyridine, pyrimidine and s-triazine is H <br/><br> Balmer α, followed by fluorescence from ionised species, molecular bands and <br/><br> Balmer β, γ , δ; (3) the Rydberg enhancement seen in fluorescence measure- <br/><br> ments of water [Melero et al. PRL 96 (2006) 063003], corroborated later in <br/><br> H2 S [paper II], N H3 [paper III] and C H4 [paper III] and postulated as gen- <br/><br> eral behaviour for molecules formed by low-Z atoms, is also seen in larger <br/><br> organic cyclic molecules, e.g. azabenzenes; (4) when dissociative ionisation <br/><br> of pyridine, pyridazine, pyrimidine, pyrazine, s-triazine and 2-deoxy-D-ribose <br/><br> occurs, concerted bond rearrangement and nuclear motion takes place as op- <br/><br> posed to stepwise dissociation [papers V and VI].}}, author = {{Vall-llosera, Gemma}}, isbn = {{978-91-7178-852-8}}, language = {{eng}}, publisher = {{KTH}}, title = {{Synchrotron radiation studies of gas phase molecules; from hydrogen to DNA sugars}}, year = {{2008}}, }