Please use this identifier to cite or link to this item:
http://hdl.handle.net/10316/4402
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Paixão, José António | - |
dc.contributor.author | Silva, Manuela Ramos | - |
dc.contributor.author | Beja, Ana Matos | - |
dc.contributor.author | Eusébio, Ermelinda | - |
dc.date.accessioned | 2008-09-01T11:06:30Z | - |
dc.date.available | 2008-09-01T11:06:30Z | - |
dc.date.issued | 2006 | en_US |
dc.identifier.citation | Polyhedron. 25:9 (2006) 2021-2025 | en_US |
dc.identifier.uri | http://hdl.handle.net/10316/4402 | - |
dc.description.abstract | l-Tryptophanium hydrogen selenite was synthesised and structurally characterised at room and low temperature. The aminoacid is positively charged with the amine and carboxylic group protonated. It adopts a staggered conformation with the N1 gauche to C4 that is gauche to C1. The anion displays a pyramidal conformation with three different Se-O bond lengths, one characteristic of a double bond, another of a single bond and the third with an intermediate character. At room temperature there is a disordered hydrogen atom between the carboxylic group of the cation and the O atom of the anion with the intermediate Se-O bond length. At low temperature this hydrogen atom orders and attaches to the carboxylic group. This ordering is most likely related to the transition seen in DSC measurements occurring at -82.5 °C. | en_US |
dc.description.uri | http://www.sciencedirect.com/science/article/B6TH8-4JCBPGR-2/1/c662b0efb725c1398debc306ae4eb8f9 | en_US |
dc.format.mimetype | aplication/PDF | en |
dc.language.iso | eng | eng |
dc.rights | openAccess | eng |
dc.subject | Phase transition | en_US |
dc.subject | Hydrogen bonds | en_US |
dc.subject | DSC measurements | en_US |
dc.subject | Optical properties | en_US |
dc.title | Crystal structure and properties of l-tryptophanium hydrogen selenite | en_US |
dc.type | article | en_US |
item.languageiso639-1 | en | - |
item.fulltext | Com Texto completo | - |
item.grantfulltext | open | - |
crisitem.author.dept | Faculdade de Ciências e Tecnologia, Universidade de Coimbra | - |
crisitem.author.parentdept | Universidade de Coimbra | - |
crisitem.author.researchunit | Coimbra Chemistry Center | - |
crisitem.author.orcid | 0000-0002-5515-7721 | - |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
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file994dfb3c99f4432fb088c7991e160a29.pdf | 475.44 kB | Adobe PDF | View/Open |
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