{"title":"Photochromic Dysprosium Single-Molecule Magnet Featuring Reversible Redox Transformation of Polyoxomolybdate Moiet","authors":"Hui Kong, Jing-Yu Wang, Jia-Chuan Liu, Lu Zhang, Pei-Yu Liao, Yu-Quan Qi, Zheng Liu, Si-Guo Wu, Ming-Liang Tong","doi":"10.1002/anie.202422557","DOIUrl":null,"url":null,"abstract":"A photochromic dysprosium-based single-molecule magnet [Dy(CyPh2PO)2(H2O)5](PMo12O40)·3CyPh2PO·H2O (1-Dy) is synthesized via cocrystal engineering of a polyoxomolybdate (POMo) anion and an Ising-type cation with pseudo pentagonal bipyramidal geometry. Upon ultraviolet irradiation, MoVI-to-MoV single-electron photoreduction occurs in the POMo moiety, resulting in significant changes of optical and magnetic properties. The emergence of intervalence charge-transfer transitions in heteropoly blue state 1-Dy* facilitates photothermal conversion in near-infrared region. Meanwhile, the coercive field of hysteresis loop is altered from 0.72 T (1-Dy) to 0.04 T (1-Dy*) at 2 K, which might be contributed to the magnetic interaction between DyIII and MoV. After dark treatment, 1-Dy* can convert to the initial state with the recovery of magnetic memory effect. These results presented herein provide a blueprint for developing versatile opto-magnetic materials via the coupling of photochemical regulation and magnetic interaction.","PeriodicalId":125,"journal":{"name":"Angewandte Chemie International Edition","volume":"12 1","pages":""},"PeriodicalIF":16.1000,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Angewandte Chemie International Edition","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1002/anie.202422557","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
A photochromic dysprosium-based single-molecule magnet [Dy(CyPh2PO)2(H2O)5](PMo12O40)·3CyPh2PO·H2O (1-Dy) is synthesized via cocrystal engineering of a polyoxomolybdate (POMo) anion and an Ising-type cation with pseudo pentagonal bipyramidal geometry. Upon ultraviolet irradiation, MoVI-to-MoV single-electron photoreduction occurs in the POMo moiety, resulting in significant changes of optical and magnetic properties. The emergence of intervalence charge-transfer transitions in heteropoly blue state 1-Dy* facilitates photothermal conversion in near-infrared region. Meanwhile, the coercive field of hysteresis loop is altered from 0.72 T (1-Dy) to 0.04 T (1-Dy*) at 2 K, which might be contributed to the magnetic interaction between DyIII and MoV. After dark treatment, 1-Dy* can convert to the initial state with the recovery of magnetic memory effect. These results presented herein provide a blueprint for developing versatile opto-magnetic materials via the coupling of photochemical regulation and magnetic interaction.
期刊介绍:
Angewandte Chemie, a journal of the German Chemical Society (GDCh), maintains a leading position among scholarly journals in general chemistry with an impressive Impact Factor of 16.6 (2022 Journal Citation Reports, Clarivate, 2023). Published weekly in a reader-friendly format, it features new articles almost every day. Established in 1887, Angewandte Chemie is a prominent chemistry journal, offering a dynamic blend of Review-type articles, Highlights, Communications, and Research Articles on a weekly basis, making it unique in the field.