Chiral-discriminative amino acid films prepared by vacuum vaporization and/or plasma processing

Autor:	Michiko Seyama, Tadashi Katoh, Iwao Sugimoto, Shigeki Ogawa, Masayuki Nakamura
Rok vydání:	2000
Předmět:	Limonene Carvone technology industry and agriculture Analytical chemistry Sorption Biochemistry Analytical Chemistry Crystal chemistry.chemical_compound chemistry Vaporization Electrochemistry Environmental Chemistry Molecule Inductively coupled plasma Plasma processing Spectroscopy
Zdroj:	The Analyst. 125:169-174
ISSN:	1364-5528 0003-2654
DOI:	10.1039/a907149k
Popis:	D-Phenylalanine (D-Phe) films capable of discriminating optical isomers were prepared by dry processing: radiofrequency sputtering or vacuum vaporization with and without the assistance of an inductively coupled plasma (ICP). Chemical and spectroscopic analyses revealed that the majority of the constituents of the vaporized film are D-Phe molecules. However, the film prepared by ICP-assisted vaporization contains scarcely any D-Phe. The chiral-sensing properties of these D-Phe films were confirmed by sorption measurements on cyclic monoterpenes. Quartz crystal resonators coated with these films respond to the (−)-forms of limonene and α-pinene preferentially to their (+)-forms at the ppm level. This chiral preference was not observed for carvone, which induced comparable frequency shifts to limonene and α-pinene even at sub-ppm levels. The strong electrostatic interactions of the carbonyl group in carvone probably overcome the weak interactions of the discriminative optical isomers.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::580862755d5edd6c9daa191ce534a821 https://doi.org/10.1039/a907149k Zobrazit plný text záznamu