Click chemistry is a rapid,reliable,and powerful function and a highly selective organic reaction that facilitates the efficient synthesis of various molecules by joining small units.This approach has found widespread...Click chemistry is a rapid,reliable,and powerful function and a highly selective organic reaction that facilitates the efficient synthesis of various molecules by joining small units.This approach has found widespread applications in fields such as drug development,chemical synthesis,and molecular biology.In recent years,the reaction of alkali-catalyzed polymerization of thiol and sulfur has been employed to prepare various sulfur-containing polymers,which are applied as electrochemical active electrode materials in the pursuit of good performance.In this study,it is surprising to find that the reaction mechanism exhibits characteristics of both the alkali-catalyzed sulfhydryl Micheal addition reaction and thiol-epoxy click chemistry;for the first time,thiol-sulfur click chemistry is defined in detail,providing a comprehensive description of its underlying scientific principles.The introduction of this new reaction pathway holds significant potential for advancing research and the development of sulfur-containing polymers.Based on this novel click chemistry,a new sulfur-containing polymer,polydivinylthioether hexasulfide,has been designed and successfully applied as a cathode material in lithium-organosulfide batteries.This material demonstrates excellent electrochemical performance,achieving an initial capacity that reaches 790.5 mAh g−1(82.6%of theoretical capacity),and in a long-term cycle test,the capacity decay rate is only 0.063%after 1,000 cycles.展开更多
To address the current issues of low reconfigurability,low integration,and high dynamic power consumption in programmable units,this study proposes a novel programmable photonic unit cell,termed MZI-cascaded-ring unit...To address the current issues of low reconfigurability,low integration,and high dynamic power consumption in programmable units,this study proposes a novel programmable photonic unit cell,termed MZI-cascaded-ring unit(MCR).The unit functions analogously to an MZI,enabling broadband routing when operating within the free spectral range(FSR)of the embedded resonator,and it transitions into a wavelength-selective mode,leveraging the micro-ring’s resonance to achieve precise amplitude and phase control for narrowband signals while outside the FSR,featuring dual operational regimes.With the implementation of spiral waveguide structures,the design achieves higher integration density and lower dynamic power consumption.Based on the hexagonal mesh extension of such a unit,the programmable photonic processor successfully demonstrates a reconfiguration of large amounts of fundamental functions with tunable performance metrics,including broadband linear operations like optical router and wavelength-selective functionalities like wavelength division multiplexing.This work establishes a new paradigm for programmable photonic integrated circuit design.展开更多
基金supported by the National Natural Science Foundation of China(52463013 and 52073133)the Major Science and Technology Project of Gansu Province(22ZD6GA008)the Incubation Program of Excelent Doctoral Dissertation-Lanzhou Univer-sity of Technology.
文摘Click chemistry is a rapid,reliable,and powerful function and a highly selective organic reaction that facilitates the efficient synthesis of various molecules by joining small units.This approach has found widespread applications in fields such as drug development,chemical synthesis,and molecular biology.In recent years,the reaction of alkali-catalyzed polymerization of thiol and sulfur has been employed to prepare various sulfur-containing polymers,which are applied as electrochemical active electrode materials in the pursuit of good performance.In this study,it is surprising to find that the reaction mechanism exhibits characteristics of both the alkali-catalyzed sulfhydryl Micheal addition reaction and thiol-epoxy click chemistry;for the first time,thiol-sulfur click chemistry is defined in detail,providing a comprehensive description of its underlying scientific principles.The introduction of this new reaction pathway holds significant potential for advancing research and the development of sulfur-containing polymers.Based on this novel click chemistry,a new sulfur-containing polymer,polydivinylthioether hexasulfide,has been designed and successfully applied as a cathode material in lithium-organosulfide batteries.This material demonstrates excellent electrochemical performance,achieving an initial capacity that reaches 790.5 mAh g−1(82.6%of theoretical capacity),and in a long-term cycle test,the capacity decay rate is only 0.063%after 1,000 cycles.
基金National Natural Science Foundation of China(62075038)Postgraduate Research&Practice Innovation Program of Jiangsu Province(KYCX24_0401).
文摘To address the current issues of low reconfigurability,low integration,and high dynamic power consumption in programmable units,this study proposes a novel programmable photonic unit cell,termed MZI-cascaded-ring unit(MCR).The unit functions analogously to an MZI,enabling broadband routing when operating within the free spectral range(FSR)of the embedded resonator,and it transitions into a wavelength-selective mode,leveraging the micro-ring’s resonance to achieve precise amplitude and phase control for narrowband signals while outside the FSR,featuring dual operational regimes.With the implementation of spiral waveguide structures,the design achieves higher integration density and lower dynamic power consumption.Based on the hexagonal mesh extension of such a unit,the programmable photonic processor successfully demonstrates a reconfiguration of large amounts of fundamental functions with tunable performance metrics,including broadband linear operations like optical router and wavelength-selective functionalities like wavelength division multiplexing.This work establishes a new paradigm for programmable photonic integrated circuit design.
