A novel in-situ spectroelectrochemical technique, the combination of probe beam deflection (PBD) with cyclic voltammetry (CV),was used to study the ion cxchange process of prussian blue(PB) modified film electrode in ...A novel in-situ spectroelectrochemical technique, the combination of probe beam deflection (PBD) with cyclic voltammetry (CV),was used to study the ion cxchange process of prussian blue(PB) modified film electrode in contact with various electrolyte solutions. The ion exchange mechanism was veritied as following: where on reduction PB film in contact with an acidic KCl electrolyte, it was confirmed that protons enter into the PB film before K+ cations.展开更多
1 Main resultA connected open set Ω C<sup>n</sup> is called a domain of holomorphy, if there do not exist nonemptyopen sets Ω<sub>1</sub>, Ω<sub>2</sub> with Ω<sub>2</s...1 Main resultA connected open set Ω C<sup>n</sup> is called a domain of holomorphy, if there do not exist nonemptyopen sets Ω<sub>1</sub>, Ω<sub>2</sub> with Ω<sub>2</sub> connected, Ω<sub>1</sub> Ω<sub>2</sub>∩Ω, Ω<sub>2</sub> Ω, so that for every u that is holo-morphic on Ω there is a u<sub>2</sub> holomorphic on Ω<sub>2</sub> with u=u<sub>2</sub> on Ω<sub>1</sub>. This definition is compli-cated. Generally speaking, a domain of holomorphy is a domain of definition of holomorphicfunctions in the sense that there exists a holomorphic function on Ω that cannot be holomor-phically continued to any slightly large open set. Domains of holomorphy play a very importantrole in the theory of several complex variables. There are many different characterizations fordomains of holomorphy--geometrical, analytical or algebraical, each takes its different effi-cient functions in treating various concrete problems of several complex variables （see ref.[1], for example）. In this note, we use the skills of sheaf theory to give a characterization ofdomains of holomorphy by mealls of some interpolation property.展开更多
The ab initio crystal orbital calculations on conjugated aromatic six-membered rings polymers, namely, poly(p-phenylene) (PPP), poly(2,5-pyridinediyl) (PPD), poly(2,5-phosphabenzene) (PPB) and ploy(2,5-arsabenzene) (P...The ab initio crystal orbital calculations on conjugated aromatic six-membered rings polymers, namely, poly(p-phenylene) (PPP), poly(2,5-pyridinediyl) (PPD), poly(2,5-phosphabenzene) (PPB) and ploy(2,5-arsabenzene) (PAB) are reported. The comparison of the important electronic properties of these polymers, such as band gap, bandwidth, ionization potential and electron affinity, indicates that PPP is the best intrinsic semiconductor, and PPD has the best prospects for forming n-doped conducting materials.展开更多
The band structures of Group IVB (Ti, Zr, Hf), VB (V, Nb, Ta) and VIE (Cr, Mo, W) transition metals and some of their carbides and nitrides (TiN, ZrN, HfN, VC, NbC, TaC, VN, NbN, TaN) with NaCl-type (B1-type) structur...The band structures of Group IVB (Ti, Zr, Hf), VB (V, Nb, Ta) and VIE (Cr, Mo, W) transition metals and some of their carbides and nitrides (TiN, ZrN, HfN, VC, NbC, TaC, VN, NbN, TaN) with NaCl-type (B1-type) structure have been calculated by using the tight-binding method within the Extended Huckel approximation (EHT). The energy bands, densities of states and crystal orbital overlap populations are given. The relationship between the bonding properties and the superconducting transition temperatures (T-c) of them is discussed. The influences of various kinds of metallic atoms and changes of bond lengths on T-c are also discussed.展开更多
文摘A novel in-situ spectroelectrochemical technique, the combination of probe beam deflection (PBD) with cyclic voltammetry (CV),was used to study the ion cxchange process of prussian blue(PB) modified film electrode in contact with various electrolyte solutions. The ion exchange mechanism was veritied as following: where on reduction PB film in contact with an acidic KCl electrolyte, it was confirmed that protons enter into the PB film before K+ cations.
文摘1 Main resultA connected open set Ω C<sup>n</sup> is called a domain of holomorphy, if there do not exist nonemptyopen sets Ω<sub>1</sub>, Ω<sub>2</sub> with Ω<sub>2</sub> connected, Ω<sub>1</sub> Ω<sub>2</sub>∩Ω, Ω<sub>2</sub> Ω, so that for every u that is holo-morphic on Ω there is a u<sub>2</sub> holomorphic on Ω<sub>2</sub> with u=u<sub>2</sub> on Ω<sub>1</sub>. This definition is compli-cated. Generally speaking, a domain of holomorphy is a domain of definition of holomorphicfunctions in the sense that there exists a holomorphic function on Ω that cannot be holomor-phically continued to any slightly large open set. Domains of holomorphy play a very importantrole in the theory of several complex variables. There are many different characterizations fordomains of holomorphy--geometrical, analytical or algebraical, each takes its different effi-cient functions in treating various concrete problems of several complex variables （see ref.[1], for example）. In this note, we use the skills of sheaf theory to give a characterization ofdomains of holomorphy by mealls of some interpolation property.
基金Project supported by the State Science and Technology Commission and the National Natural Science Foundation of China.
文摘The ab initio crystal orbital calculations on conjugated aromatic six-membered rings polymers, namely, poly(p-phenylene) (PPP), poly(2,5-pyridinediyl) (PPD), poly(2,5-phosphabenzene) (PPB) and ploy(2,5-arsabenzene) (PAB) are reported. The comparison of the important electronic properties of these polymers, such as band gap, bandwidth, ionization potential and electron affinity, indicates that PPP is the best intrinsic semiconductor, and PPD has the best prospects for forming n-doped conducting materials.
基金Project supported by the National Natural Science Foundation of China and the Foundation of the State Key Laboratory of Structural Chemistry of China.
文摘The band structures of Group IVB (Ti, Zr, Hf), VB (V, Nb, Ta) and VIE (Cr, Mo, W) transition metals and some of their carbides and nitrides (TiN, ZrN, HfN, VC, NbC, TaC, VN, NbN, TaN) with NaCl-type (B1-type) structure have been calculated by using the tight-binding method within the Extended Huckel approximation (EHT). The energy bands, densities of states and crystal orbital overlap populations are given. The relationship between the bonding properties and the superconducting transition temperatures (T-c) of them is discussed. The influences of various kinds of metallic atoms and changes of bond lengths on T-c are also discussed.
