6533b829fe1ef96bd1289a10
RESEARCH PRODUCT
DETECTION LIMITS FOR NATURAL CIRCULAR-DICHROISM OF CHIRAL COMPLEXES IN THE X-RAY RANGE
Danièle PereyFrançois BaudeletFrancesco SetteClaude MoïsePetra RudolfAlain FontaineJosé Goulonsubject
Detection limitCircular dichroismRange (particle radiation)Magnetic circular dichroismChemistrymedia_common.quotation_subjectXAFSSOFT-X-RAY SPECTROSCOPYGeneral EngineeringAnalytical chemistryX-rayGeneral Physics and AstronomyOPTICAL-ACTIVITYAsymmetryMolecular physicssymbols.namesakeROTATORY STRENGTHFerromagnetismNATURAL CDFaraday effectsymbolsABSORPTIONOPTICAL ASYMMETRYTRANSITION-METAL COMPLEXESmedia_commondescription
Whereas both Magnetic Circular Dichroism and Faraday Rotation studies have been successfully carried out at the K-, L- and M-absorption edges of metal atoms in ferromagnetic systems, Natural optical activity of chiral complexes has not yet been detected quite unambiguously in the X-ray range. We review a number of theoretical arguments which confirm that the optical asymmetry factor gσ should be very small in the X-ray range for unoriented powdered samples, especially at the K-absorption edges. This stimulating challenge prompted us to start an intensive programme of measurements aimed at detecting natural circular dichroism in both the soft and “firm” X-ray ranges. Although some of our experiments look consistent with the presence of the expected effect, our conclusions cannot be taken yet as definitive due to the presence of a weak residual signal which, unfortunately, could not be eliminated.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-01-01 | Japanese journal of applied physics part 1-Regular papers short notes & review papers |