Photoreactive coordination polymers are important platforms for the implementation of tailored solidstate photochemical reactions.These crystalline compounds can also be employed as photo-controlled intelligent materi...Photoreactive coordination polymers are important platforms for the implementation of tailored solidstate photochemical reactions.These crystalline compounds can also be employed as photo-controlled intelligent materials for the design and manufacture of advanced devices.Herein,a comb-like photoreactive coordination polymer,formulated as{[Zn(5-Cl-1,3-bdc)(H_(2)O)(2,3-ppe)]·H_(2)O}_(n)(1),was prepared based on the hydrothermal reaction between Zn(NO_(3))2·6H_(2)O,5-chlorobenzene-1,3-dicarboxylic acid(5-Cl-1,3-H_(2)BDC)and 1-(2-pyridyl)-2-(3-pyridyl)-ethylene(2,3-ppe).Upon irradiation with sunlight,the 1H NMR spectroscopy,UV-vis absorption spectroscopy and single crystal X-ray diffraction analyses results indicated that 1 can undergo a[^(2+)2]photocycloaddition reaction and thus generate a unique ladder-like coordination chain{[Zn(5-Cl-1,3-bdc)(H_(2)O)(2,3-bpbpcb)_(0.5)]·H_(2)O}n(1a,2,3-bpbpcb=1,3-bis(2-pyridyl)-2,4-bis(3-pyridyl)cyclobutane)via single-crystal to single-crystal(SCSC)transformation.Upon irradiation of UV light with a wavelength of 254 nm,the newly formed coordination chain 1a can undergo a reversible cycloreversion reaction and return to 1.The reversible photo-controllable cycloaddition-cycloreversion reaction between 1 and 1a also exhibits an interesting behavior of photo-switchable fluorescence.The reversible structural transformation and fluorescence switching behavior of 1 make it a potential photo-controlled intelligent material for optical information storage,optical anti-counterfeiting,fluorescence sensors and other fields.展开更多
A bifunctional electrode(oxygen evolution reaction(OER)and capacitive properties)with high electrochemical activity is crucial for both supercapacitors and water splitting devices.Herein,a S and oxygen vacancy co-dope...A bifunctional electrode(oxygen evolution reaction(OER)and capacitive properties)with high electrochemical activity is crucial for both supercapacitors and water splitting devices.Herein,a S and oxygen vacancy co-doped nickel-iron layered double hydroxide(NiFe-LDHS)electrode was delicately fabricated through combining acid etching and sulfidation strategies.The strong synergy between S and oxygen vacancies was firmly confirmed in this work,which increased the intrinsic activity of the electrode via a double internal polarization field path.Furthermore,the impact of S doping on the bifunctionality of the electrode was systematically studied.展开更多
Constructing suitable electrode materials with high capacity and excellent mechanical properties is indispensable for flexible lithium-ion batteries(LIBs)to satisfy the growing requirements of flexible and wearable el...Constructing suitable electrode materials with high capacity and excellent mechanical properties is indispensable for flexible lithium-ion batteries(LIBs)to satisfy the growing requirements of flexible and wearable electronic devices.Herein,a necklace-like architecture of metal-organic framework(MOF)-derived hollow octahedral CoFe_(2)O_(4)confined into electrospun one-dimensional N-doped carbon nanofibers(CoFe_(2)O_(4)@CNFs)is successfully developed.展开更多
基金supported by the National Natural Science Foundation of China(21201068)the Major Projects of Natural Science Research in Universities of Jiangsu Province(20KJA150002)+2 种基金the Natural Science Research Program of Huaian Science and Technology Bureau(HAB202156)the Huaishang Talent Program of Huaian,the Open Project of Key Laboratory for Chemistry of Low-Dimensional Materials in Universities of Jiangsu Province(Grant JSKC24027)the Excellent Scientific and Technological Innovation Team of Advanced Energy Materials Chemistry in Universities of Jiangsu Province and the Innovative Training Program for College Students.
文摘Photoreactive coordination polymers are important platforms for the implementation of tailored solidstate photochemical reactions.These crystalline compounds can also be employed as photo-controlled intelligent materials for the design and manufacture of advanced devices.Herein,a comb-like photoreactive coordination polymer,formulated as{[Zn(5-Cl-1,3-bdc)(H_(2)O)(2,3-ppe)]·H_(2)O}_(n)(1),was prepared based on the hydrothermal reaction between Zn(NO_(3))2·6H_(2)O,5-chlorobenzene-1,3-dicarboxylic acid(5-Cl-1,3-H_(2)BDC)and 1-(2-pyridyl)-2-(3-pyridyl)-ethylene(2,3-ppe).Upon irradiation with sunlight,the 1H NMR spectroscopy,UV-vis absorption spectroscopy and single crystal X-ray diffraction analyses results indicated that 1 can undergo a[^(2+)2]photocycloaddition reaction and thus generate a unique ladder-like coordination chain{[Zn(5-Cl-1,3-bdc)(H_(2)O)(2,3-bpbpcb)_(0.5)]·H_(2)O}n(1a,2,3-bpbpcb=1,3-bis(2-pyridyl)-2,4-bis(3-pyridyl)cyclobutane)via single-crystal to single-crystal(SCSC)transformation.Upon irradiation of UV light with a wavelength of 254 nm,the newly formed coordination chain 1a can undergo a reversible cycloreversion reaction and return to 1.The reversible photo-controllable cycloaddition-cycloreversion reaction between 1 and 1a also exhibits an interesting behavior of photo-switchable fluorescence.The reversible structural transformation and fluorescence switching behavior of 1 make it a potential photo-controlled intelligent material for optical information storage,optical anti-counterfeiting,fluorescence sensors and other fields.
基金financially supported by the National Natural Science Foundation of China(21405105)the Shanghai Natural Science Foundation(14ZR1429300)the State Key Laboratory of Green Catalysis of Sichuan Institutes of Higher Education(LZJ1703).
文摘A bifunctional electrode(oxygen evolution reaction(OER)and capacitive properties)with high electrochemical activity is crucial for both supercapacitors and water splitting devices.Herein,a S and oxygen vacancy co-doped nickel-iron layered double hydroxide(NiFe-LDHS)electrode was delicately fabricated through combining acid etching and sulfidation strategies.The strong synergy between S and oxygen vacancies was firmly confirmed in this work,which increased the intrinsic activity of the electrode via a double internal polarization field path.Furthermore,the impact of S doping on the bifunctionality of the electrode was systematically studied.
基金supported by the(Grant No.2019YFB2205005)the Natural Science Foundation of Fujian Province(Grant No.2020J01050)。
文摘Constructing suitable electrode materials with high capacity and excellent mechanical properties is indispensable for flexible lithium-ion batteries(LIBs)to satisfy the growing requirements of flexible and wearable electronic devices.Herein,a necklace-like architecture of metal-organic framework(MOF)-derived hollow octahedral CoFe_(2)O_(4)confined into electrospun one-dimensional N-doped carbon nanofibers(CoFe_(2)O_(4)@CNFs)is successfully developed.
