ArticleNature communications2026
Metal-center electron affinity modulates multicolor electrochromism in 2D conjugated metal-organic frameworks.
Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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15 authors.
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Abstract
Two-dimensional conjugated metal-organic frameworks are emerging platforms for electrochromic devices, yet the current stage is limited by monotonous color and an unclear coloration mechanism. While prior studies emphasize the ligand-centered redox process, the role of metal centers is often overlooked. Herein, we report a metal-center electron-affinity mechanism that is critical to electrochromic performance. We first employ an unsupervised machine learning method to screen divalent metal-catecholate (CAT) systems, identifying Zn, Ni, and Cu as optimal candidates. All three systems exhibit multicolor transitions from green to blue and eventually to purple; however, Zn- and Ni-CAT-1 significantly outperform Cu-CAT-1, with nearly threefold faster switching speeds (4.8/5.4 vs. 14.4 s) and cycling stability enhanced by two orders of magnitude ( > 20000 vs. < 300 s). Cu
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