Yellow light-emitting diodes(LEDs) as soft light have attracted abundant attention in lithography room, museum and art gallery. However, the development of efficient yellow LEDs lags behind green and blue LEDs, and th...Yellow light-emitting diodes(LEDs) as soft light have attracted abundant attention in lithography room, museum and art gallery. However, the development of efficient yellow LEDs lags behind green and blue LEDs, and the available perovskites yellow LEDs suffer from the instability. Herein, a pressure-assisted cooling method is proposed to grow lead-free CsCu2I3single crystals, which possess uniform surface morphology and enhanced photoluminescence quantum yield(PLQY) stability, with only 10% PLQY losses after being stored in air after 5000 h.Then, the single crystals used for yellow LEDs without encapsulation exhibit a decent Correlated Color Temperature(CCT) of 4290 K, a Commission Internationale de l’Eclairage(CIE) coordinate of(0.38, 0.41), and an excellent 570-h operating stability under heating temperature of 100°C. Finally, the yellow LEDs facilitate the application in wireless visible light communication(VLC), which show a-3 dB bandwidth of 21.5 MHz and a high achievable data rate of 219.2 Mbps by using orthogonal frequency division multiplexing(OFDM) modulation with adaptive bit loading. The present work not only promotes the development of lead-free single crystals, but also inspires the potential of CsCu2I3in the field of yellow illumination and wireless VLC.展开更多
Copper halide clusters have become one of the most prosperous cluster-based materials.They are not only widely used in the fields of photophysics and photochemistry,but also adsorption,catalysis,biology,etc.Herein,the...Copper halide clusters have become one of the most prosperous cluster-based materials.They are not only widely used in the fields of photophysics and photochemistry,but also adsorption,catalysis,biology,etc.Herein,the recent progress in copper halide based chemistry is reviewed from three aspects.In the first place,we summarize the new synthesis strategies promoting the crystallization of copper halide cluster-based materials.Then,the structural diversity of the compounds is introduced according to the dimension of copper halogen clusters.Finally,we discuss the functionality of copper halide cluster-based materials including optical,catalytic and adsorption properties.In addition,perspectives on their potential applications are presented.展开更多
A supported iron catalyst, which was prepared by anchoring FeCl2/FeCl3 on the cross-linking macroporous polyacrylate ion exchange resin, was evaluated via the controlled radical polymerization. When a small amount of ...A supported iron catalyst, which was prepared by anchoring FeCl2/FeCl3 on the cross-linking macroporous polyacrylate ion exchange resin, was evaluated via the controlled radical polymerization. When a small amount of CuCl2/ Me6TREN was added, the controllability of the polymerization over the iron-mediated catalyst was significantly improved(Mw/Mn = 1.23-1.73 ), affording a polymer with a low residual metal via a simple catalyst separation procedure. After suitable regeneration, the supported iron catalyst could also he recycled. UV-Vis analysis showed that the additional copper catalyst could facilitate the radical deactivation process.展开更多
The broad emission and high photoluminescence quantum yield of self-trapped exciton(STE)radiative recombination emitters make them an ideal solution for single-substrate,white,solid-state lighting sources.Unlike impur...The broad emission and high photoluminescence quantum yield of self-trapped exciton(STE)radiative recombination emitters make them an ideal solution for single-substrate,white,solid-state lighting sources.Unlike impurities and defects in semiconductors,the formation of STEs requires a lattice distortion,along with strong electron–phonon coupling,in low electrondimensional materials.The photoluminescence of inorganic copper(Ⅰ)metal halides with low electron-dimensionality has been found to be the result of STEs.These materials were of significant interest because of their leadfree,all-inorganic structures,and high luminous efficiencies.In this paper,we summarize the luminescence characteristics of zero-and one-dimensional inorganic copper(I)metal halides with STEs to provide an overview of future research opportunities.展开更多
The title compound Cu 2Cl 2phen (phen=1,10 phenanthroline, C 12 H 8N 2) 1 was synthesized from CuCl 2·2H 2O, CuCl and phen by hydrothermal method and its structure was determined by single crystal X r...The title compound Cu 2Cl 2phen (phen=1,10 phenanthroline, C 12 H 8N 2) 1 was synthesized from CuCl 2·2H 2O, CuCl and phen by hydrothermal method and its structure was determined by single crystal X ray analysis. With phen, CuCl forms one dimensional chains, which comprise two zigzag chains based on fused Cu X units and connected via covalent bonds. The compound contains two crystallographically unique monovalent copper ions, Cu(1) and Cu(2). The Cu(1) atom in the tetrahedral site, is coordinated to two bridging Cl - and two N atoms in phen. The Cu(2) atom with a slightly distorted triangular planar geometry, is coordinated to three Cl -. The compound 1 was crystallized in monoclinic, space group P 2 1/ n with a = 0.37338(4) , b =1.9510(2), c =1.68008(19) nm, β =95.605(3)°, R =0.0458, and was characterized by elemental analysis, IR spectrum and TGA analysis.展开更多
The hydrothermal reactions of CuI, KI and bidentate amines [ 1,10 phenanthroline (phen) or ethylenediamine (en)] gave the three copper(I) halide compounds, Cu3I3(phen)2 (1), CuI(phen)2 (2) and 2 (3), which were stru...The hydrothermal reactions of CuI, KI and bidentate amines [ 1,10 phenanthroline (phen) or ethylenediamine (en)] gave the three copper(I) halide compounds, Cu3I3(phen)2 (1), CuI(phen)2 (2) and 2 (3), which were structurally characterized via singlecrystal Xray diffraction studies. Hydrogen bonds and ππ interactions are the most remarkable structural features of the title compounds. All can be described as higherdimensional supramolecular compounds connected via these secondary bondings. Moreover, the title compounds were characterized by elemental analyses, IR spectra and TGA analyses. The thirdorder nonlinear optical properties of the title compounds were also investigated and all exhibit nicer nonlinear absorption and selffocusing performance.Keywords copper(I) halide, hydrothermal synthesis, the thirdorder nonlinear optical property, supramolecular structure展开更多
基金This work is funded by National Natural Science Foundation of China(Nos.61904023,11974063)Fundamental Research Funds for the Cen-tral Universities(2021CDJQY-022)Natural Science Foundation of Chongqing(No.cstc2019jcyj-bshX0078,cstc2020jcyj-jqX0028).
文摘Yellow light-emitting diodes(LEDs) as soft light have attracted abundant attention in lithography room, museum and art gallery. However, the development of efficient yellow LEDs lags behind green and blue LEDs, and the available perovskites yellow LEDs suffer from the instability. Herein, a pressure-assisted cooling method is proposed to grow lead-free CsCu2I3single crystals, which possess uniform surface morphology and enhanced photoluminescence quantum yield(PLQY) stability, with only 10% PLQY losses after being stored in air after 5000 h.Then, the single crystals used for yellow LEDs without encapsulation exhibit a decent Correlated Color Temperature(CCT) of 4290 K, a Commission Internationale de l’Eclairage(CIE) coordinate of(0.38, 0.41), and an excellent 570-h operating stability under heating temperature of 100°C. Finally, the yellow LEDs facilitate the application in wireless visible light communication(VLC), which show a-3 dB bandwidth of 21.5 MHz and a high achievable data rate of 219.2 Mbps by using orthogonal frequency division multiplexing(OFDM) modulation with adaptive bit loading. The present work not only promotes the development of lead-free single crystals, but also inspires the potential of CsCu2I3in the field of yellow illumination and wireless VLC.
基金supported by the National Natural Science Foundation of China(21771181 and 21973096)Youth Innovation Promotion Association CAS(2017345)。
文摘Copper halide clusters have become one of the most prosperous cluster-based materials.They are not only widely used in the fields of photophysics and photochemistry,but also adsorption,catalysis,biology,etc.Herein,the recent progress in copper halide based chemistry is reviewed from three aspects.In the first place,we summarize the new synthesis strategies promoting the crystallization of copper halide cluster-based materials.Then,the structural diversity of the compounds is introduced according to the dimension of copper halogen clusters.Finally,we discuss the functionality of copper halide cluster-based materials including optical,catalytic and adsorption properties.In addition,perspectives on their potential applications are presented.
文摘A supported iron catalyst, which was prepared by anchoring FeCl2/FeCl3 on the cross-linking macroporous polyacrylate ion exchange resin, was evaluated via the controlled radical polymerization. When a small amount of CuCl2/ Me6TREN was added, the controllability of the polymerization over the iron-mediated catalyst was significantly improved(Mw/Mn = 1.23-1.73 ), affording a polymer with a low residual metal via a simple catalyst separation procedure. After suitable regeneration, the supported iron catalyst could also he recycled. UV-Vis analysis showed that the additional copper catalyst could facilitate the radical deactivation process.
基金the National Key Research and Development Plan of China(No.2019YFE0107200)the National Natural Science Foundation of China(Grant No.11705277),the Natural Science Foundation of Hubei Province(No.2020CFB700)+1 种基金the Doctoral Research Foundation Project of Hubei University of Arts and Science(No.kyqdf2020023)Innovation Research Team Project of Hubei University of Arts and Science(No.2020kypytd001).
文摘The broad emission and high photoluminescence quantum yield of self-trapped exciton(STE)radiative recombination emitters make them an ideal solution for single-substrate,white,solid-state lighting sources.Unlike impurities and defects in semiconductors,the formation of STEs requires a lattice distortion,along with strong electron–phonon coupling,in low electrondimensional materials.The photoluminescence of inorganic copper(Ⅰ)metal halides with low electron-dimensionality has been found to be the result of STEs.These materials were of significant interest because of their leadfree,all-inorganic structures,and high luminous efficiencies.In this paper,we summarize the luminescence characteristics of zero-and one-dimensional inorganic copper(I)metal halides with STEs to provide an overview of future research opportunities.
文摘The title compound Cu 2Cl 2phen (phen=1,10 phenanthroline, C 12 H 8N 2) 1 was synthesized from CuCl 2·2H 2O, CuCl and phen by hydrothermal method and its structure was determined by single crystal X ray analysis. With phen, CuCl forms one dimensional chains, which comprise two zigzag chains based on fused Cu X units and connected via covalent bonds. The compound contains two crystallographically unique monovalent copper ions, Cu(1) and Cu(2). The Cu(1) atom in the tetrahedral site, is coordinated to two bridging Cl - and two N atoms in phen. The Cu(2) atom with a slightly distorted triangular planar geometry, is coordinated to three Cl -. The compound 1 was crystallized in monoclinic, space group P 2 1/ n with a = 0.37338(4) , b =1.9510(2), c =1.68008(19) nm, β =95.605(3)°, R =0.0458, and was characterized by elemental analysis, IR spectrum and TGA analysis.
基金theNationalNaturalScienceFoundationofChina (No .2 97330 90 )theDoctoralProgramofHigherEducation(No.19990 18310 )
文摘The hydrothermal reactions of CuI, KI and bidentate amines [ 1,10 phenanthroline (phen) or ethylenediamine (en)] gave the three copper(I) halide compounds, Cu3I3(phen)2 (1), CuI(phen)2 (2) and 2 (3), which were structurally characterized via singlecrystal Xray diffraction studies. Hydrogen bonds and ππ interactions are the most remarkable structural features of the title compounds. All can be described as higherdimensional supramolecular compounds connected via these secondary bondings. Moreover, the title compounds were characterized by elemental analyses, IR spectra and TGA analyses. The thirdorder nonlinear optical properties of the title compounds were also investigated and all exhibit nicer nonlinear absorption and selffocusing performance.Keywords copper(I) halide, hydrothermal synthesis, the thirdorder nonlinear optical property, supramolecular structure