We analyze the line data from solar flares to present evidence for the emission spectrum of the recently discussed electron-proton pairs at high temperatures. We also point out that since the pairing phenomenon provid...We analyze the line data from solar flares to present evidence for the emission spectrum of the recently discussed electron-proton pairs at high temperatures. We also point out that since the pairing phenomenon provides an additional source for these lines—the conventional source being the highly ionized high-Z atoms already existing in the solar atmosphere, we have a plausible explanation of the FIP effect.展开更多
Metal-organic frameworks(MOFs)present a multifaceted avenue for visible light photocatalysis and are candidates for environmental applications,in which electron and proton transfers are crucial.To date,the photocataly...Metal-organic frameworks(MOFs)present a multifaceted avenue for visible light photocatalysis and are candidates for environmental applications,in which electron and proton transfers are crucial.To date,the photocatalytic activity of MOFs has been attempted,but with inherent limitations against formidable redox conditions.This can be addressed by adopting an electron-proton transfer mediator to mediate the redox processes over a MOF photocatalyst.To achieve this goal,an electron-proton transfer mediator,HOOC-TEMPO(4-carboxy-2,2,6,6-tetramethylpiperidine-1-oxyl),is envisioned to steer the selective oxidation of amines over a pyrene-based MOF NU-1000.There are abundant terminal hydroxyl groups of Zr-oxo cluster within the mesoporous channels of NU-1000.Supported by density functional theory calculations,the bidentate chelation of HOOC-TEMPO onto NU-1000 by reacting with the hydroxyl groups is the most feasible mode of adsorption.The optoelectronic properties of NU-1000 can be notably improved by the facile and dynamic adsorption of HOOC-TEMPO.Distinctly,1 mol%HOOCTEMPO promotes NU-1000 photocatalysis,allowing for three times of conversions in the aerobic oxidation of amines to imines.Compellingly,the hole transfer between the pyrene ligand of NU-1000 and HOOC-TEMPO is more efficient than other ligands.The merger of an electron-proton transfer mediator and MOFs creates a unique materials avenue for emerging photocatalysis.展开更多
The results of two-boson-exchange effects in the parity-violating elastic electron-proton scattering are reported based on a simple hadronic model. The corrections are calculated including the nucleon and △（1232） i...The results of two-boson-exchange effects in the parity-violating elastic electron-proton scattering are reported based on a simple hadronic model. The corrections are calculated including the nucleon and △（1232） intermediate states. And the numerical results are also compared with the recent results reported by other group and other methods.展开更多
Electro-production of several pentaquark states is investigated in this study.The eSTARlight package is adapted to study the electro-production of J/ψand γ(1S)via pentaquark P_(c)and P_(b)resonance channels in ep→...Electro-production of several pentaquark states is investigated in this study.The eSTARlight package is adapted to study the electro-production of J/ψand γ(1S)via pentaquark P_(c)and P_(b)resonance channels in ep→eJ/ψp and ep→eγ(1S)p scattering processes at the proposed electron-ion colliders(EICs).The results obtained in this study are compared to those of non-resonance t-channels,which are described in the pomeron exchange model developed in our studies.Some pseudo-rapidity and rapidity distributions of J/ψand γ(1S)are presented for the proposed EICs,including EicC and EIC-US.It is found that EicC is a good platform to identify P_(b) states in the future.展开更多
文摘We analyze the line data from solar flares to present evidence for the emission spectrum of the recently discussed electron-proton pairs at high temperatures. We also point out that since the pairing phenomenon provides an additional source for these lines—the conventional source being the highly ionized high-Z atoms already existing in the solar atmosphere, we have a plausible explanation of the FIP effect.
基金supported by the National Natural Science Foundation of China(22072108 and 22372124).
文摘Metal-organic frameworks(MOFs)present a multifaceted avenue for visible light photocatalysis and are candidates for environmental applications,in which electron and proton transfers are crucial.To date,the photocatalytic activity of MOFs has been attempted,but with inherent limitations against formidable redox conditions.This can be addressed by adopting an electron-proton transfer mediator to mediate the redox processes over a MOF photocatalyst.To achieve this goal,an electron-proton transfer mediator,HOOC-TEMPO(4-carboxy-2,2,6,6-tetramethylpiperidine-1-oxyl),is envisioned to steer the selective oxidation of amines over a pyrene-based MOF NU-1000.There are abundant terminal hydroxyl groups of Zr-oxo cluster within the mesoporous channels of NU-1000.Supported by density functional theory calculations,the bidentate chelation of HOOC-TEMPO onto NU-1000 by reacting with the hydroxyl groups is the most feasible mode of adsorption.The optoelectronic properties of NU-1000 can be notably improved by the facile and dynamic adsorption of HOOC-TEMPO.Distinctly,1 mol%HOOCTEMPO promotes NU-1000 photocatalysis,allowing for three times of conversions in the aerobic oxidation of amines to imines.Compellingly,the hole transfer between the pyrene ligand of NU-1000 and HOOC-TEMPO is more efficient than other ligands.The merger of an electron-proton transfer mediator and MOFs creates a unique materials avenue for emerging photocatalysis.
基金Supported by National Natural Science Foundation of China (10805009)
文摘The results of two-boson-exchange effects in the parity-violating elastic electron-proton scattering are reported based on a simple hadronic model. The corrections are calculated including the nucleon and △（1232） intermediate states. And the numerical results are also compared with the recent results reported by other group and other methods.
基金National Natural Science Foundation of China(11975278,11405222)Key Research Program of the Chinese Academy of Sciences(XDPB09)。
文摘Electro-production of several pentaquark states is investigated in this study.The eSTARlight package is adapted to study the electro-production of J/ψand γ(1S)via pentaquark P_(c)and P_(b)resonance channels in ep→eJ/ψp and ep→eγ(1S)p scattering processes at the proposed electron-ion colliders(EICs).The results obtained in this study are compared to those of non-resonance t-channels,which are described in the pomeron exchange model developed in our studies.Some pseudo-rapidity and rapidity distributions of J/ψand γ(1S)are presented for the proposed EICs,including EicC and EIC-US.It is found that EicC is a good platform to identify P_(b) states in the future.
