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An exceptional series of phase transitions in hydrophobic amino acids with linear side chains
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SYSNO ASEP 0465896 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title An exceptional series of phase transitions in hydrophobic amino acids with linear side chains Author(s) Görbitz, C.H. (NO)
Karen, P. (NO)
Dušek, Michal (FZU-D) RID, ORCID, SAI
Petříček, Václav (FZU-D) RID, ORCID, SAISource Title IUCrJ. - : Oxford Blackwell - ISSN 2052-2525
Roč. 3, Sep (2016), s. 341-353Number of pages 13 s. Language eng - English Country GB - United Kingdom Keywords amino acids ; disorder ; hydrogen bonding ; modulated phases ; phase transitions ; side-chain stacking ; polymorphism ; molecular crystals Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects LO1603 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support FZU-D - RVO:68378271 UT WOS 000383249400008 EID SCOPUS 84986220677 DOI 10.1107/S2052252516010472 Annotation The solid-state phase transitions and intermediate structures of S-2-aminobutanoic acid (l-2-aminobutyric acid), S-2-aminopentanoic acid (l-norvaline), S-2-aminohexanoic acid (l-norleucine) and l-methionine between 100 and 470 K, identified by differential scanning calorimetry, have been characterized in a comprehensive single-crystal X-ray diffraction investigation. Unlike other enantiomeric amino acids investigated until now, this group featuring linear side chains displays up to five distinct phases. The multiple transitions between them involve a number of different processes: alteration of t he hydrogen-bond pattern, sliding of molecular bilayers, concerted side-chain rearrangements and abrupt as well as gradual modifications of the side-chain disorder. Ordering of l-norleucine upon cooling even proceeds via an incommensurately modulated structure. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2017
Number of the records: 1