The Crystal Structure of cis-β-Λ-Carbonato(S,S-triethylenetetramine)cobalt(III) Perchlorate: Spontaneous Resolution and Determination of Absolute Configuration

Masuda, Hideki; Masuda, Chie; Jitsukawa, Koichiro; Einaga, Hisahiko

doi:10.1246/bcsj.67.3000

Cited by 6 publications

(4 citation statements)

References 6 publications

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“…Several other such sources are described in Masuda's thesis (1994). As pointed out by Masuda et al (1994), these observations lend support to theories that place the location of flare energy release high up in the corona. The power law hard X-ray spectra of the LT sources indicate that electron acceleration is indeed occurring at or near these locations.…”

Section: Introductionsupporting

confidence: 69%

“…We have used Masuda's (1994) selection criteria (heliocentric longitude > 80 degrees, peak count rate > 10 counts per sec per subcollimator in the ∼ 33 − 53 keV range, i.e. the M2 channel).…”

Section: Data Analysis and Resultsmentioning

confidence: 99%

“…The first so-called "Masuda" flare is that of January 13, 1992 (Masuda et al 1994; see also Alexander & Metcalf 1997), which is clearly delineated by a soft X-ray (thermal) loop, and shows three compact hard X-ray sources, two located at the footpoints (FPs) and a third near the loop top (LT). Several other such sources are described in Masuda's thesis (1994).…”

Section: Introductionmentioning

confidence: 99%

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Looptop and footpoint impulsive hard X-rays and stochastic electron acceleration in flares

Petrosian

2002

Multi-Wavelength Observations of Coronal Structure and Dynamics, Yohkoh 10th Anniversary Meeting

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The discovery of hard X-rays from tops of flaring loops by the HXT of YOHKOH represents a significant progress in the understanding of solar flares. This report describes the properties of 20 limb flares observed by YOHKOH from October 1991 to August 1998, 15 of which show detectable impulsive looptop emission. Considering the finite dynamic range (about a decade) of the detection it can be concluded that looptop emission is a common feature of all flares. The light curves and images of a representative flare are presented and the statistical properties of the footpoint and looptop fluxes and spectral indexes are summarized. The importance of these observations, and those expected from HESSI with its superior angular, spectral and temporal resolution, in constraining the acceleration models and parameters is discussed briefly.

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Section: Introductionsupporting

confidence: 69%

Section: Data Analysis and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Looptop and footpoint impulsive hard X-rays and stochastic electron acceleration in flares

Petrosian

2002

Multi-Wavelength Observations of Coronal Structure and Dynamics, Yohkoh 10th Anniversary Meeting

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“…Thin films of ZnO can be prepared by several growth techniques, including pulsed laser deposition [11,12] and radio-frequency magnetron sputtering [13,14]. However, the quality of ZnO films obtained by these methods depends on either a high growth temperature (350°C to 450°C) or a post-growth annealing process.…”

Section: Introductionmentioning

confidence: 99%

High-performance flexible Ag nanowire electrode with low-temperature atomic-layer-deposition fabrication of conductive-bridging ZnO film

Duan¹,

Yu²,

Chen³

et al. 2016

Nano Online

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which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.As material for flexible transparent electrodes for organic photoelectric devices, the silver nanowires (AgNWs) have been widely studied. In this work, we propose a hybrid flexible anode with photopolymer substrate, which is composed of spin-coating-processed AgNW meshes and of zinc oxide (ZnO) prepared by low-temperature (60°C) atomic layer deposition. ZnO effectively fills in the voids of the AgNW mesh electrode, which is thus able to contact to the device all over the active area, to allow for efficient charge extraction/injection. Furthermore, ZnO grown by low temperature mainly relies on hole conduction to make the anode play a better role. Hole-only devices are fabricated to certify the functionality of the low-temperature ZnO film. Finally, we confirm that the ZnO film grown at a low temperature bring a significant contribution to the performance of the modified AgNW anode.

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Ligand‐Substitution Reaction of Cobalt(III) Complexes of [CoCl(N)₅]²⁺‐type with Carbonate: Activation of Kinetic Processes by Steric Chelate Effect

Masuda

Jitsukawa

Masuda

et al. 1995

Ber Bunsenges Phys Chem

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Kinetics and mechanisms of coordination by ligand‐substitution of HCO3− for Cl− on the cobalt(III) complexes of [CoCl(N)5]2+‐type having different (N)5 backbone chelate ring structures to form those of [Co(CO3)(N)5]+‐type have been investigated in a weakly alkaline aqueous 0.10 mol dm−3 sodium perchlorate solution at ambient temperatures, in order to elucidate any possibility for the fixation of atmospheric CO2 on the coordination sphere of the transition metal center in the form of CO2−3. The HCO3− in the aqueous solution easily and substitutionally coordinates to the cobalt(III) complexes in place of coordinated chloro ligand via two consecutive rate‐determining steps, the faster one with two parallel pathways of aquation and hydroxide‐anation and the slower one with a pathway of carbonate‐anation. Of these reaction pathways, the hydroxide‐anation was explained by a dissociative interchange mechanism via conjugate base (IdCB), whereas the carbonate‐anation was explained by a nucleophilic attack of coordinated oxygen atom on the central cobalt(III) atom to the carbon atom of HCO3− while maintaining the Co – O bond throughout the step by taking the result of an EHMO calculation into consideration. The (N)5 backbone chelate ring structure served to enhance the rate of coordination of HCO3− on the cobalt(III) center as well as that of preceding aquation and hydroxide‐anation steps chiefly by its entropy effect. The pentadentate tetren backbone structure was recommended for the rapid fixation of CO2 in the form of CO2−3 on the cobalt(III) complexes of [CoCl(N)5]2+‐type.

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The Crystal Structure of cis-β-Λ-Carbonato(S,S-triethylenetetramine)cobalt(III) Perchlorate: Spontaneous Resolution and Determination of Absolute Configuration

Cited by 6 publications

References 6 publications

Looptop and footpoint impulsive hard X-rays and stochastic electron acceleration in flares

Looptop and footpoint impulsive hard X-rays and stochastic electron acceleration in flares

High-performance flexible Ag nanowire electrode with low-temperature atomic-layer-deposition fabrication of conductive-bridging ZnO film

Ligand‐Substitution Reaction of Cobalt(III) Complexes of [CoCl(N)₅]²⁺‐type with Carbonate: Activation of Kinetic Processes by Steric Chelate Effect

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The Crystal Structure of cis-β-Λ-Carbonato(S,S-triethylenetetramine)cobalt(III) Perchlorate: Spontaneous Resolution and Determination of Absolute Configuration

Cited by 6 publications

References 6 publications

Looptop and footpoint impulsive hard X-rays and stochastic electron acceleration in flares

Looptop and footpoint impulsive hard X-rays and stochastic electron acceleration in flares

High-performance flexible Ag nanowire electrode with low-temperature atomic-layer-deposition fabrication of conductive-bridging ZnO film

Ligand‐Substitution Reaction of Cobalt(III) Complexes of [CoCl(N)5]2+‐type with Carbonate: Activation of Kinetic Processes by Steric Chelate Effect

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Product

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Ligand‐Substitution Reaction of Cobalt(III) Complexes of [CoCl(N)₅]²⁺‐type with Carbonate: Activation of Kinetic Processes by Steric Chelate Effect