title: Studies on electron spin resonance spectroscopy of biradical molecules containing (14)N-O and (15)N-O moieties.
abstract: The biradicals with (14)N-Oxide and (15)N-Oxide at the both ends of a molecule are synthesized for the molecular ruler of protein structure, and a potential device for quantum computing. We also establish a general synthetic method for reliable biradical formation. ESR spectra are recorded for the biradicals containing (15)N-Oxide and (14)N-Oxide with various interdistance separations. We find that two types of biradicals yielded different ESR spectra depending upon the distance between the (15)N-O and (14)N-O moieties in a molecule. This is due to electron spin dipole-dipole interaction occurring between the radicals. We also find that there is an indication of isotopic nuclear effects in the dipole-dipole interactions. The present study implies feasibility of the distance measurement between two different N-Oxides containing (14)N and (15)N isotopes. We conclude that quantum entanglement effects are observed through the dipolar interactions, which enable application of quantum computing devices operating in the liquid state.
authors.affiliation: Soft Matter Physics Laboratory, Graduate School of Emergent Functional Science, Muroran Institute of Technology, Muroran 050-8585, Japan.
authors.forename: Hiromi
authors.initials: H
authors.lastname: Kameya
authors.forename: Hideo
authors.initials: H
authors.lastname: Nakamura
authors.forename: Mitsuko
authors.initials: M
authors.lastname: Ukai
authors.forename: Yuhei
authors.initials: Y
authors.lastname: Shimoyama
mesh_terms: D000577:Amides / Q000737:chemistry; D003497:Cyclic N-Oxides / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy; D005609:Free Radicals / Q000138:chemical synthesis / Q000737:chemistry*; D008280:Magnetics; D009587:Nitrogen Isotopes; D009589:Nitrogen Oxides / Q000737:chemistry
chemical_list: D000577:Amides; D003497:Cyclic N-Oxides; D005609:Free Radicals; D009587:Nitrogen Isotopes; D009589:Nitrogen Oxides