Optical encryption technologies based on room-temperature light-emitting materials are of considerable interest.Herein,we present three-dimensional(3D)printable dual-light-emitting materials for high-performance optic...Optical encryption technologies based on room-temperature light-emitting materials are of considerable interest.Herein,we present three-dimensional(3D)printable dual-light-emitting materials for high-performance optical pattern encryption.These are based on fluorescent perovskite nanocrystals(NCs)embedded in metal-organic frameworks(MOFs)designed for phosphorescent host-guest interactions.Notably,perovskite-containing MOFs emit a highly efficient blue phosphorescence,and perovskite NCs embedded in the MOFs emit characteristic green or red fluorescence under ultraviolet(UV)irradiation.Such dual-light-emitting MOFs with independent fluorescence and phosphorescence emissions are employed in pochoir pattern encryption,wherein actual information with transient phosphorescence is efficiently concealed behind fake information with fluorescence under UV exposure.Moreover,a 3D cubic skeleton is developed with the dual-light-emitting MOF powder dispersed in 3D-printable polymer filaments for 3D dual-pattern encryption.This article outlines a universal principle for developing MOF-based room-temperature multi-light-emitting materials and a strategy for multidimensional information encryption with enhanced capacity and security.展开更多
As an emerging class of crystalline organic material,covalent organic frameworks(COFs)possess uniform porosity,versatile functionality,and precise control over designated structures.Aside from the favorable charge and...As an emerging class of crystalline organic material,covalent organic frameworks(COFs)possess uniform porosity,versatile functionality,and precise control over designated structures.Aside from the favorable charge and mass transport pathways offered by the porous framework,COFs can also exhibit designed reversible redox activity.In the past few years,their potential has attracted a great deal of attention for charge storage and transport applications in various electrochemical energy storage devices,and numerous design strategies have been proposed to enhance the corresponding electrochemical properties.This review summarizes the working principle and synthesis methods of COFs and discusses significant findings for supercapacitors and various rechargeable battery systems,emphasizing the representative design strategies and their underlying relationship with electrochemical performances.In addition,key advances achieved by computations are highlighted along with the challenges and prospects in this field.展开更多
基金supported by the Creative Materials Discovery Program and the Pioneer Research Center Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Science,ICT&Future Planning(2018M3D1A1058536 and NRF-2022M3C1A3081211)supported by a grant from the National Research Foundation of Korea(NRF)funded by the Korean government(MEST)(No.RS-2023-00208577)+1 种基金supported by National R&D Program through the National Research Foundation of Korea funded by the Ministry of Science and ICT(2021M3H4A1A03047331)supported by the Open Resource Research Program of the Korea Institute of Science and Technology(2E31551).
文摘Optical encryption technologies based on room-temperature light-emitting materials are of considerable interest.Herein,we present three-dimensional(3D)printable dual-light-emitting materials for high-performance optical pattern encryption.These are based on fluorescent perovskite nanocrystals(NCs)embedded in metal-organic frameworks(MOFs)designed for phosphorescent host-guest interactions.Notably,perovskite-containing MOFs emit a highly efficient blue phosphorescence,and perovskite NCs embedded in the MOFs emit characteristic green or red fluorescence under ultraviolet(UV)irradiation.Such dual-light-emitting MOFs with independent fluorescence and phosphorescence emissions are employed in pochoir pattern encryption,wherein actual information with transient phosphorescence is efficiently concealed behind fake information with fluorescence under UV exposure.Moreover,a 3D cubic skeleton is developed with the dual-light-emitting MOF powder dispersed in 3D-printable polymer filaments for 3D dual-pattern encryption.This article outlines a universal principle for developing MOF-based room-temperature multi-light-emitting materials and a strategy for multidimensional information encryption with enhanced capacity and security.
基金Division of Chemical,Bioengineering,Environmental,and Transport Systems,National Science Foundation,Grant/Award Number:1805052。
文摘As an emerging class of crystalline organic material,covalent organic frameworks(COFs)possess uniform porosity,versatile functionality,and precise control over designated structures.Aside from the favorable charge and mass transport pathways offered by the porous framework,COFs can also exhibit designed reversible redox activity.In the past few years,their potential has attracted a great deal of attention for charge storage and transport applications in various electrochemical energy storage devices,and numerous design strategies have been proposed to enhance the corresponding electrochemical properties.This review summarizes the working principle and synthesis methods of COFs and discusses significant findings for supercapacitors and various rechargeable battery systems,emphasizing the representative design strategies and their underlying relationship with electrochemical performances.In addition,key advances achieved by computations are highlighted along with the challenges and prospects in this field.
