Carbon edge XANES spectroscopy of amino acids and peptides

Boese, Jan; Osanna, A.; Jacobsen, Chris; Kirz, Janos

doi:10.1016/s0368-2048(97)00032-7

Cited by 128 publications

(135 citation statements)

References 14 publications

Supporting

Mentioning

127

Contrasting

Order By: Relevance

“…Earlier experimental studies have demonstrated that X-ray spectra of conglomerates of organic molecules are often merely a superposition of the spectra of individual molecules and functional groups. [76] In our case, the dramatic changes observed in the Si L 2,3 XES spectra upon exposure of LPSi to the molecules containing nitrogroups also point to dissociative adsorption of these molecules. Similar dissociative adsorption has been demonstrated theoretically for nitroamine molecules at the Al(111) surface.…”

Section: Resultssupporting

confidence: 55%

Selective Response of Mesoporous Silicon to Adsorbants with Nitro Groups

McLeod¹,

Kurmaev²,

Sushko³

et al. 2012

Chemistry A European J

View full text Add to dashboard Cite

We demonstrate that the electronic structure of mesoporous silicon is affected by adsorption of nitro-based explosive molecules in a compoundselective manner. This selective response is demonstrated by probing the adsorption of two nitro-based molecular explosives (trinitrotoluene and cyclotrimethylenetrinitramine) and a nonexplosive nitro-based aromatic molecule (nitrotoluene) on mesoporous silicon using soft X-ray spectroscopy. The Si atoms strongly interact with adsorbed molecules to form Si-O and Si-N bonds, as evident from the large shifts in emission energy present in the Si L2,3 X-ray emission spectroscopy (XES) measurements. Furthermore, we find that the energy gap of mesoporous silicon changes depending on the adsorbant, as estimated from the Si L2,3 XES and 2p Xray absorption spectroscopy (XAS) measurements. Our ab initio molecular dynamics calculations of model compounds suggest that these changes are due to spontaneous breaking of the nitro groups upon contacting surface Si atoms. This compound-selective change in electronic structure may provide a powerful tool for the detection and identification of trace quantities of airborne explosive molecules.

show abstract

Section: Resultssupporting

confidence: 55%

Selective Response of Mesoporous Silicon to Adsorbants with Nitro Groups

McLeod¹,

Kurmaev²,

Sushko³

et al. 2012

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…Soon, more complex samples from polymer science were investigated using NEXAFS spectroscopy, see for example Kikuma and Tonner (1996); Urquhart and Ade (2002). Over the recent years, more and more complex heterogeneous samples from biomolecular (Boese et al 1997;Hitchcock et al 2005;Benzerara et al 2006) or environmental (Cody et al 1998;Braun 2005;Solomon et al 2009) origin were studied. Especially natural organic matter and soils Schumacher et al 2005;Lehmann et al 2007;Thieme et al 2010), or particulate matter (Braun et al , 2007 were subject to such studies, by which valuable information about the chemical composition and functional groups and also their change due to photolysis, temperature, and so on could be gained.…”

mentioning

confidence: 99%

Characterization of refractory organic substances by NEXAFS using a compact X-ray source

et al. 2011

View full text Add to dashboard Cite

Purpose We present the characterization of environmental samples using near-edge X-ray absorption fine structure (NEXAFS) spectra recorded with an in-house device. We want to point out the feasibility of such an easily accessed complementary technique, if not sometimes alternative to NEXAFS studies performed with synchrotron radiation, as the number of compact setups is increasing. Materials and methods The experiments were carried out using a laser-driven plasma source. We studied heterogeneous samples like refractory organic substances to demonstrate the potential of NEXAFS spectra, achieved by such an instrument, concerning specimens of high chemical complexity.Results and discussion From the respective resonance peaks in the spectra, the presence of certain functional groups, such as aromatic or carbonyl groups, is verified, and the elemental composition is estimated. The results of the reference samples are consistent with the literature. For the environmental samples, external influences of the extraction solvent or fertilizers can be determined from the spectra. Conclusions This could provide the possibility to perform test experiments with samples, which are later studied in more detail with synchrotron light and might as well give an impulse on the broader spread of the application of NEXAFS spectroscopy.

show abstract

“…Soon, more complex samples from polymer science were subject to NEXAFS studies [2,105,204]. Over the recent years more and more complex heterogeneous samples from biomolecular [20,26,77,102] or environmental [31,43,44,129,174] origin were investigated. Especially natural organic matter and soils [164,179] or particulate matter, fine dust particles originating from combustion [29,182], were subject to such studies.…”

Section: Spectroscopic Measurements Of Different Fractions Of Nommentioning

confidence: 99%

Soft x-ray spectromicroscopy of environmental and biological samples

Sedlmair¹

2011

Göttingen Series in X-Ray Physics

View full text Add to dashboard Cite

Carbon edge XANES spectroscopy of amino acids and peptides

Cited by 128 publications

References 14 publications

Selective Response of Mesoporous Silicon to Adsorbants with Nitro Groups

Selective Response of Mesoporous Silicon to Adsorbants with Nitro Groups

Characterization of refractory organic substances by NEXAFS using a compact X-ray source

Soft x-ray spectromicroscopy of environmental and biological samples

Contact Info

Product

Resources

About