Water‐Enhanced Multicolor Electrochromism in Nickel‐Catecholate MOFs
Abstract Metal–organic frameworks (MOFs) represent a novel electrochromic material system but are limited in tunable color versatility, rapid switching speed, and long‐term cycling stability. A new multicolor electrochromic behavior is reported, with transitions from green to blue to purple, in cond...
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| Language: | English |
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Wiley
2025-07-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202500678 |
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| author | Qi Zhao Jing Yang Xingyang Wang Wanwan Wang Yulin Gao Xue Chen Jianguo Sun Hao Yuan Yu Liu Jinwoo Park Lewis Kien Juen Ting Qing Wang Pooi See Lee Yanfeng Gao Yong‐Wei Zhang John Wang |
| author_facet | Qi Zhao Jing Yang Xingyang Wang Wanwan Wang Yulin Gao Xue Chen Jianguo Sun Hao Yuan Yu Liu Jinwoo Park Lewis Kien Juen Ting Qing Wang Pooi See Lee Yanfeng Gao Yong‐Wei Zhang John Wang |
| author_sort | Qi Zhao |
| collection | DOAJ |
| description | Abstract Metal–organic frameworks (MOFs) represent a novel electrochromic material system but are limited in tunable color versatility, rapid switching speed, and long‐term cycling stability. A new multicolor electrochromic behavior is reported, with transitions from green to blue to purple, in conducting nickel‐catecholate (Ni‐CAT‐1) MOFs. The system significantly improves cycling stability to 2000 cycles and reduces switching time to 3.6 s, both of which outperform most state‐of‐the‐art MOF systems. An in‐depth understanding of the coloring mechanism, particularly the interconversion among C─O, C─O•, and C = O groups is revealed. Water molecules play diverse roles in this redox process. Specifically, water molecules induce distortions in Ni─O bonds, facilitating C = O bond formation and expediting the oxidized coloring process, while also aiding the dissociation of ions from solvation complexes to enhance the reduction process. The practical applications of these findings are demonstrated by designing flexible multicolor electrochromic devices (FMEDs) for use in camouflage, flexible displays, and augmented reality (AR). |
| format | Article |
| id | doaj-art-92f253e1adde456cb6f51be90a8f8ba3 |
| institution | Kabale University |
| issn | 2198-3844 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-92f253e1adde456cb6f51be90a8f8ba32025-08-20T03:30:48ZengWileyAdvanced Science2198-38442025-07-011225n/an/a10.1002/advs.202500678Water‐Enhanced Multicolor Electrochromism in Nickel‐Catecholate MOFsQi Zhao0Jing Yang1Xingyang Wang2Wanwan Wang3Yulin Gao4Xue Chen5Jianguo Sun6Hao Yuan7Yu Liu8Jinwoo Park9Lewis Kien Juen Ting10Qing Wang11Pooi See Lee12Yanfeng Gao13Yong‐Wei Zhang14John Wang15Department of Materials Science and Engineering National University of Singapore Singapore 117575 Republic of SingaporeInstitute of High Performance Computing (IHPC) Agency for Science Technology and Research (A*STAR) 1 Fusionopolis Way, #16‐16 Connexis Singapore 138632 Republic of SingaporeDepartment of Materials Science and Engineering National University of Singapore Singapore 117575 Republic of SingaporeInstitute of Materials Research and Engineering (IMRE) Agency for Science Technology and Research (A*STAR) 2 Fusionopolis Way, Innovis #08‐03 Singapore 138634 Republic of SingaporeDepartment of Materials Science and Engineering National University of Singapore Singapore 117575 Republic of SingaporeSchool of Materials Science and Engineering Shanghai University Shanghai 200444 P. R. ChinaDepartment of Materials Science and Engineering National University of Singapore Singapore 117575 Republic of SingaporeInstitute of High Performance Computing (IHPC) Agency for Science Technology and Research (A*STAR) 1 Fusionopolis Way, #16‐16 Connexis Singapore 138632 Republic of SingaporeDepartment of Materials Science and Engineering National University of Singapore Singapore 117575 Republic of SingaporeSchool of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Republic of SingaporeDepartment of Materials Science and Engineering National University of Singapore Singapore 117575 Republic of SingaporeDepartment of Materials Science and Engineering National University of Singapore Singapore 117575 Republic of SingaporeSchool of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Republic of SingaporeSchool of Materials Science and Engineering Shanghai University Shanghai 200444 P. R. ChinaInstitute of High Performance Computing (IHPC) Agency for Science Technology and Research (A*STAR) 1 Fusionopolis Way, #16‐16 Connexis Singapore 138632 Republic of SingaporeDepartment of Materials Science and Engineering National University of Singapore Singapore 117575 Republic of SingaporeAbstract Metal–organic frameworks (MOFs) represent a novel electrochromic material system but are limited in tunable color versatility, rapid switching speed, and long‐term cycling stability. A new multicolor electrochromic behavior is reported, with transitions from green to blue to purple, in conducting nickel‐catecholate (Ni‐CAT‐1) MOFs. The system significantly improves cycling stability to 2000 cycles and reduces switching time to 3.6 s, both of which outperform most state‐of‐the‐art MOF systems. An in‐depth understanding of the coloring mechanism, particularly the interconversion among C─O, C─O•, and C = O groups is revealed. Water molecules play diverse roles in this redox process. Specifically, water molecules induce distortions in Ni─O bonds, facilitating C = O bond formation and expediting the oxidized coloring process, while also aiding the dissociation of ions from solvation complexes to enhance the reduction process. The practical applications of these findings are demonstrated by designing flexible multicolor electrochromic devices (FMEDs) for use in camouflage, flexible displays, and augmented reality (AR).https://doi.org/10.1002/advs.202500678coloring mechanismconducting metal–organic frameworksmulticolor electrochromic behaviorwater molecules |
| spellingShingle | Qi Zhao Jing Yang Xingyang Wang Wanwan Wang Yulin Gao Xue Chen Jianguo Sun Hao Yuan Yu Liu Jinwoo Park Lewis Kien Juen Ting Qing Wang Pooi See Lee Yanfeng Gao Yong‐Wei Zhang John Wang Water‐Enhanced Multicolor Electrochromism in Nickel‐Catecholate MOFs Advanced Science coloring mechanism conducting metal–organic frameworks multicolor electrochromic behavior water molecules |
| title | Water‐Enhanced Multicolor Electrochromism in Nickel‐Catecholate MOFs |
| title_full | Water‐Enhanced Multicolor Electrochromism in Nickel‐Catecholate MOFs |
| title_fullStr | Water‐Enhanced Multicolor Electrochromism in Nickel‐Catecholate MOFs |
| title_full_unstemmed | Water‐Enhanced Multicolor Electrochromism in Nickel‐Catecholate MOFs |
| title_short | Water‐Enhanced Multicolor Electrochromism in Nickel‐Catecholate MOFs |
| title_sort | water enhanced multicolor electrochromism in nickel catecholate mofs |
| topic | coloring mechanism conducting metal–organic frameworks multicolor electrochromic behavior water molecules |
| url | https://doi.org/10.1002/advs.202500678 |
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