title: Characteristic oxygen K-edge circular dichroism spectra of amino acid films by improved measurement technique.
abstract: Circular dichroism (CD) spectroscopy in the soft x-ray energy region is a new tool to study the local structure of chiral materials. In this paper, we introduce a method to measure high-quality CD spectra in the oxygen K-edge energy region. Characteristic CD spectra of thin films of the amino acids L-tyrosine and L-aspartic acid are reported and compared with those of films of L-alanine and L-serine. The signals from the oxygen 1s → π∗ transitions of COO-, which is a common moiety in these amino acids, reflect the local geometry of each amino acid.
authors: Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan. izumi@spring8.or.jp
authors: Yudai
authors: Y
authors: Izumi
authors: Maiko
authors: M
authors: Tanabe
authors: Akiko
authors: A
authors: Imazu
authors: Aki
authors: A
authors: Mimoto
authors: Masahito
authors: M
authors: Tanaka
authors: Akane
authors: A
authors: Agui
authors: Takayuki
authors: T
authors: Muro
authors: Kazumichi
authors: K
authors: Nakagawa
mesh_terms: D000042:Absorption; D000596:Amino Acids / Q000737:chemistry*; D016880:Anisotropy; D002942:Circular Dichroism / Q000379:methods*; D055620:Optical Phenomena; D010100:Oxygen / Q000737:chemistry*
chemical_list: D000596:Amino Acids; D010100:Oxygen