Showing papers by "Edwin E. Budzinski published in 1979"
TL;DR: In this article, the hyperfine couplings of the electron with protons of the polarized hydroxy groups forming the trap were investigated, and the distances between these protons and the trapped electron were measured.
Abstract: Two additional carbohydrates are reported whose crystal structures trap electrons intermolecularly in single crystals x irradiated at low temperature, namely sucrose and rhamnose. Five carbohydrate and polyhydroxy compounds are now known which exhibit this phenomenon. The following characteristics of the phenomenon were investigated: (1) the hyperfine couplings of the electron with protons of the polarized hydroxy groups forming the trap; (2) the distances between these protons and the trapped electron; (3) the spin density of the electron at the protons and (4) the relative stabilities of the electron trapped in various crystal structures.
41 citations
TL;DR: In this article, a major component of the ESR absorption is attributed to trapped electrons based on the character of the hyperfine pattern, which arises from multiple anisotropic hyperfine interactions with exchangeable protons, and the g value of the absorption, which is always less than the free spin value.
Abstract: The intermolecular trapping of electrons has been observed in single crystals of dulcitol and L(+) arabinose x‐irradiated at 4.2 °K. Attribution of a major component of the ESR absorption to trapped electrons is based upon the character of the hyperfine pattern, which arises from multiple anisotropic hyperfine interactions with exchangeable protons, and on the g value of the absorption, which is always less than the free spin value. The removal of the trapped electron absorption upon irradiation with visible light has also been demonstrated. In these experiments all of the electrons are trapped in identical sites. This circumstance provides some important advantages in the study of the factors affecting the stabilization of charge in an environment of polarizable molecules.
41 citations
TL;DR: In this paper, the hyperfine couplings of the electron with protons of the polarized hydroxy groups forming the trap were investigated, and the distances between these protons and the trapped electron were measured.
Abstract: Two additional carbohydrates are reported whose crystal structures trap electrons intermolecularly in single crystals x irradiated at low temperature, namely sucrose and rhamnose. Five carbohydrate and polyhydroxy compounds are now known which exhibit this phenomenon. The following characteristics of the phenomenon were investigated: (1) the hyperfine couplings of the electron with protons of the polarized hydroxy groups forming the trap; (2) the distances between these protons and the trapped electron; (3) the spin density of the electron at the protons and (4) the relative stabilities of the electron trapped in various crystal structures.
TL;DR: In this paper, a major component of the ESR absorption is attributed to trapped electrons based on the character of the hyperfine pattern, which arises from multiple anisotropic hyperfine interactions with exchangeable protons, and the g value of the absorption, which is always less than the free spin value.
Abstract: The intermolecular trapping of electrons has been observed in single crystals of dulcitol and L(+) arabinose x‐irradiated at 4.2 °K. Attribution of a major component of the ESR absorption to trapped electrons is based upon the character of the hyperfine pattern, which arises from multiple anisotropic hyperfine interactions with exchangeable protons, and on the g value of the absorption, which is always less than the free spin value. The removal of the trapped electron absorption upon irradiation with visible light has also been demonstrated. In these experiments all of the electrons are trapped in identical sites. This circumstance provides some important advantages in the study of the factors affecting the stabilization of charge in an environment of polarizable molecules.
TL;DR: In this paper, hyperfine couplings were reported from ENOR measurement on singles crystals of L−histidine HCl and DL−serine, which were x-irradiated at 4.2°K and the free rachcal species studied.
Abstract: Hyperfine couplings are reported from ENOR measurement on singles crystals of L‐histidine HCl and DL‐serine. The crystals were x‐irradiated at 4.2°K and the free rachcal species studied. The exchangeables proton couplings in c−+NH3 are deduced from ENOR measurements.(AIP)