Studies of photochemical reaction by CIDNP-detected ESR spectrum

CIDNP Effects of Sensitized Photochemical Dediazoniation of Arene Diazonium Salts Manipulating CIDNP Intensities by the Experimental Conditions

13C and 15N photo-CIDNP effects were determined for the reversible electron transfer from pyrene to arene diazonium salts on excitation of the charge transfer band at 360 nm. The diazonium salts being the products of back electron transfer ("cage products") show enhanced absorption for 13C(1) and the 15N-enriched diazonium group, whereas the escape products, ArH or löN2, respectively, yield emi...

Decomposition of Oxalate Precipitates by Photochemical Reaction

A photo-radiation method was applied to decompose oxalate precipitates so that it can be dissolved into dilute nitric acid. This work has been studied as a part of partitioning of minor actinides. Minor actinides can be recovered from high-level wastes as oxalate precipitates, but they tend to be coprecipitated together with lanthanide oxalates. This requires another partitioning step for mutua...

The ESR spectrum of PH4

Quantum measurement corrections to CIDNP in photosynthetic reaction centers

Chemically induced dynamic nuclear polarization is a signature of spin order appearing in many photosynthetic reaction centers. Such polarization, significantly enhanced above thermal equilibrium, is known to result from the nuclear spin sorting inherent in the radical pair mechanism underlying long-lived charge-separated states in photosynthetic reaction centers. We will show here that the rec...

Raman spectrum and ESR of Pr0.5Ca0.4Sr0.1MnO3

The powder X-ray diffraction patterns, Raman spectra, magnetization, electron spin resonance (ESR), and resistivity for Pr0.5Ca0.4Sr0.1MnO3 were studied. The Raman spectra change dramatically during the charge ordering transition, and the hardening of the 450 cm mode of the spectra is due to the unit cell reduction of the antiferromagnetic phase. The two resonance signals in the first different...