Benefiting from its bent molecular structure,3,6-pyridazinyl contained tetracationic cyclophane（1） is synthesized by template-directed method with high isolated yield up to 92%.This template-directed strategy is fur...Benefiting from its bent molecular structure,3,6-pyridazinyl contained tetracationic cyclophane（1） is synthesized by template-directed method with high isolated yield up to 92%.This template-directed strategy is further utilized to efficiently construct [2]rotaxane.展开更多
Since the discovery of ZSM-5 molecular sieves as a promising catalyst material, the synthesis of ZSM-5 has been investigated in great detail. In the first synthesis of ZSM-5,tetrapropylammonium(TPA) was used as the te...Since the discovery of ZSM-5 molecular sieves as a promising catalyst material, the synthesis of ZSM-5 has been investigated in great detail. In the first synthesis of ZSM-5,tetrapropylammonium(TPA) was used as the templating agent. However, the industrial manufacture and application of ZSM-5 molecular sieves arc limited because TPA, the templating agent, is expensive. In the attempt to search for a suitable substitute for TPA,展开更多
The exceptional electrochemical performance of zinc anodes is frequently impeded by inadequate deposition kinetics and interfacial chemistry.Herein,we introduce the stereoisomerism to inform the balanced selection of ...The exceptional electrochemical performance of zinc anodes is frequently impeded by inadequate deposition kinetics and interfacial chemistry.Herein,we introduce the stereoisomerism to inform the balanced selection of electrolyte additives,taking into account their solvation and adsorption properties,to achieve the optimal deposition behaviors and electrochemical performance.The three-point coplanar adsorption configuration,in comparison to two-point adsorption,effectively mitigates the interference of water molecules and establishes a coplanar templating effect.This approach fosters a uniform distribution of charges,encourages the preferential orientation growth of(002)planes for uniform zinc deposition.Moreover,an appropriate level of solvation ability can modulate the solvation structure without substantially increasing the de-solvation energy barrier,thereby facilitating faster deposition kinetics than what is observed in cases of strong solvation.As a result,Zn//Zn cell can achieve an excellent performance of more than 3470 h at 2 mA cm^(-2)and 1 mAh cm^(-2),and Zn//AC full cell can work for 50000 cycles at 3 A g^(-1).Additionally,under practical conditions(N/P=4.37),the assembled Zn//I2 full cell demonstrates stable lifespan for 710 cycles at 1 A g^(-1).This work showcases the interplay between adsorption configuration of stereoisomeric additives on the cycling.展开更多
13-Crown-4, 16-crown-5, dibenzo-12-crown-4 and dibenzo-14-crown-4 were synthesized by a one-pot microwave-assisted procedure in good yields. Irradiation of diols and dichlorides in the presence of sodium hydroxide in ...13-Crown-4, 16-crown-5, dibenzo-12-crown-4 and dibenzo-14-crown-4 were synthesized by a one-pot microwave-assisted procedure in good yields. Irradiation of diols and dichlorides in the presence of sodium hydroxide in DMSO gave title crown ethers presumably within a template effect. ？2009 Hossein Eshghi. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All fights reserved.展开更多
The hydrothermal reaction of Na2MoO4?2H2O, SmCl3 in acidified H2O/CH3CN solution gives rise to the title compound as colorless needle crystals, which was characterized by elemental analysis, IR and X-ray single-crysta...The hydrothermal reaction of Na2MoO4?2H2O, SmCl3 in acidified H2O/CH3CN solution gives rise to the title compound as colorless needle crystals, which was characterized by elemental analysis, IR and X-ray single-crystal diffraction techniques. Crystallographic data: Orthorhombic, Pnma, H3Mo3NaO11, Mr = 489.83, a = 8.411（2）, b = 7.566（2）, c = 14.359（3） ?, V = 913.8（3） ? 3, Z = 4, Dc = 3.560 g·cm-3, ( = 4.148 mm-1, F（000） = 912, the final R = 0.0649 and wR = 0.1569 for 1885 observed reflections with I ≥ 2σ（I）. The title compound consists of infinite chains built up by distorted {MoO6} octahedra via edge sharing, which are further connected into a three-dimensional framework by sodium ions and protoned water molecules.展开更多
基金the financial support of NNSF of China(Nos.21402069 and 21361011)the Project of Jiangxi Provincial Education Department(No.GJJ14264)
文摘Benefiting from its bent molecular structure,3,6-pyridazinyl contained tetracationic cyclophane（1） is synthesized by template-directed method with high isolated yield up to 92%.This template-directed strategy is further utilized to efficiently construct [2]rotaxane.
文摘Since the discovery of ZSM-5 molecular sieves as a promising catalyst material, the synthesis of ZSM-5 has been investigated in great detail. In the first synthesis of ZSM-5,tetrapropylammonium(TPA) was used as the templating agent. However, the industrial manufacture and application of ZSM-5 molecular sieves arc limited because TPA, the templating agent, is expensive. In the attempt to search for a suitable substitute for TPA,
基金supported by Natural Science Foundation of Hunan Province(No.2023JJ20064)the National Natural Science Foundation of China(No.52377222).
文摘The exceptional electrochemical performance of zinc anodes is frequently impeded by inadequate deposition kinetics and interfacial chemistry.Herein,we introduce the stereoisomerism to inform the balanced selection of electrolyte additives,taking into account their solvation and adsorption properties,to achieve the optimal deposition behaviors and electrochemical performance.The three-point coplanar adsorption configuration,in comparison to two-point adsorption,effectively mitigates the interference of water molecules and establishes a coplanar templating effect.This approach fosters a uniform distribution of charges,encourages the preferential orientation growth of(002)planes for uniform zinc deposition.Moreover,an appropriate level of solvation ability can modulate the solvation structure without substantially increasing the de-solvation energy barrier,thereby facilitating faster deposition kinetics than what is observed in cases of strong solvation.As a result,Zn//Zn cell can achieve an excellent performance of more than 3470 h at 2 mA cm^(-2)and 1 mAh cm^(-2),and Zn//AC full cell can work for 50000 cycles at 3 A g^(-1).Additionally,under practical conditions(N/P=4.37),the assembled Zn//I2 full cell demonstrates stable lifespan for 710 cycles at 1 A g^(-1).This work showcases the interplay between adsorption configuration of stereoisomeric additives on the cycling.
文摘13-Crown-4, 16-crown-5, dibenzo-12-crown-4 and dibenzo-14-crown-4 were synthesized by a one-pot microwave-assisted procedure in good yields. Irradiation of diols and dichlorides in the presence of sodium hydroxide in DMSO gave title crown ethers presumably within a template effect. ？2009 Hossein Eshghi. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All fights reserved.
基金the State Education Ministry, the State Personel Ministry,National Natural Science Foundation of China (20073048) and the Chines
文摘The hydrothermal reaction of Na2MoO4?2H2O, SmCl3 in acidified H2O/CH3CN solution gives rise to the title compound as colorless needle crystals, which was characterized by elemental analysis, IR and X-ray single-crystal diffraction techniques. Crystallographic data: Orthorhombic, Pnma, H3Mo3NaO11, Mr = 489.83, a = 8.411（2）, b = 7.566（2）, c = 14.359（3） ?, V = 913.8（3） ? 3, Z = 4, Dc = 3.560 g·cm-3, ( = 4.148 mm-1, F（000） = 912, the final R = 0.0649 and wR = 0.1569 for 1885 observed reflections with I ≥ 2σ（I）. The title compound consists of infinite chains built up by distorted {MoO6} octahedra via edge sharing, which are further connected into a three-dimensional framework by sodium ions and protoned water molecules.
