Leonardo Tacconi, Anna Schannong Manvell, Matteo Briganti, Dominik Czernia, Hogni Weihe, Piotr Konieczny, Jesper Bendix, Mauro Perfetti
{"title":"Exploiting High Order Magnetic Anisotropy for Advanced Magnetocaloric Refrigerants","authors":"Leonardo Tacconi, Anna Schannong Manvell, Matteo Briganti, Dominik Czernia, Hogni Weihe, Piotr Konieczny, Jesper Bendix, Mauro Perfetti","doi":"10.1002/anie.202417582","DOIUrl":null,"url":null,"abstract":"Three new 3d-4f complexes of general formula trans-[MF2(py)4][LnDOTA] (M = Cr3+ or Co3+, Ln = Dy3+ or Y3+, py = pyridine and DOTA = tetraazacyclododecane-N,N′,N″,N‴-tetraacetate) have been synthetised. The fluoride-bridged systems were designed to achieve perfect tetragonal symmetry by combining four-fold symmetric lanthanide and transition metal building blocks. From single crystal measurements, an unprecedented switch of the tetragonal anisotropy of the Dy3+ complexes has been observed. A combination of spectroscopic observations, magnetometry measurements and ab initio calculations allowed us to pinpoint the origin of this phenomenon, which is related to the peculiar energy level structure of the complexes. Moreover, the fourfold anisotropy of the complex has been exploited to design a rotating magnetocaloric experiment showing that tetragonal anisotropy holds great potential to engineer a new class of more efficient magnetic refrigerants.","PeriodicalId":125,"journal":{"name":"Angewandte Chemie International Edition","volume":"248 1","pages":""},"PeriodicalIF":16.1000,"publicationDate":"2024-11-18","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.202417582","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
Three new 3d-4f complexes of general formula trans-[MF2(py)4][LnDOTA] (M = Cr3+ or Co3+, Ln = Dy3+ or Y3+, py = pyridine and DOTA = tetraazacyclododecane-N,N′,N″,N‴-tetraacetate) have been synthetised. The fluoride-bridged systems were designed to achieve perfect tetragonal symmetry by combining four-fold symmetric lanthanide and transition metal building blocks. From single crystal measurements, an unprecedented switch of the tetragonal anisotropy of the Dy3+ complexes has been observed. A combination of spectroscopic observations, magnetometry measurements and ab initio calculations allowed us to pinpoint the origin of this phenomenon, which is related to the peculiar energy level structure of the complexes. Moreover, the fourfold anisotropy of the complex has been exploited to design a rotating magnetocaloric experiment showing that tetragonal anisotropy holds great potential to engineer a new class of more efficient magnetic refrigerants.
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.
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