{ "abstract": "Barocaloric refrigeration has great potential to replace traditional vapor-compression systems, which are conspicuously harmful to the environment. Investigating barocaloric effect driven by a practical pressure remains challenging. Here, we report that the spin-crossover (SCO) complex Fe(PC4HH)₂ (PC4HH = 4-hydroxy-N'-((pyridin-2-yl)-methylene)-benzohydrazide) exhibits a colossal and reversible barocaloric entropy change (ΔSr, up to ~125 J·K⁻¹·kg⁻¹) under a small pressure ∼7.5 MPa owing to the extremely high pressure sensitivity of transition temperature (dTc/dP, 5.56 K/MPa). Synchrotron radiation PXRD demonstrate that the source of the enhanced ΔSr and the ultra-large dTc/dP come from the gas (air) adsorption of pressure transimitting medium. The superior pressure sensitivity and outstanding barocaloric performance provide a feasible way to exploit novel barocaloric materials by utilizing the complexation properties of SCO materials with gas.", "abstract_shown": true, "affiliations": [ "Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, PR China.", "School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, PR China.", "College of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, PR China.", "State Key Laboratory of Superhard Materials, International Centre of Future Science, Jilin University, Changchun, PR China.", "Songshan Lake Materials Laboratory, Dongguan, Guangdong, PR China.", "Spallation Neutron Source Science Center, Dongguan, PR China.", "Shandong Provincial Key Laboratory of Monocrystalline Silicon semiconductor Materials and Technology, College of chemistry and chemical engineering, Dezhou University, Dezhou, China.", "Department of Physics, JC STEM Lab of Energy and Materials Physics, City University of Hong Kong, Hong Kong, China.", "Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, PR China.", "ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot, UK.", "Institute of Advanced Materials and Technology, University of Science and Technology, Beijing, PR China.", "Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, PR China. wangjing@iphy.ac.cn.", "School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, PR China. wangjing@iphy.ac.cn.", "College of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, PR China. dpzhang73@126.com.", "Multidisciplinary Unit for Energy Science, Dpto. Física de la Materia Condensada, Universidad de Sevilla, Sevilla, Spain.", "Institute of Materials Science, Technical University of Darmstadt, Darmstadt, Germany.", "Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, PR China. fxhu@iphy.ac.cn.", "School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, PR China. fxhu@iphy.ac.cn.", "Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, PR China. shenbg@iphy.ac.cn.", "School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, PR China. shenbg@iphy.ac.cn.", "Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou, China. shenbg@iphy.ac.cn.", "Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, China. shenbg@iphy.ac.cn." ], "article_type": "research article", "arxiv": null, "author_total": 23, "authors": [ { "affs": [ 0, 1 ], "name": "Yue Kan" }, { "affs": [ 2 ], "name": "Shuo Meng" }, { "affs": [ 0, 1 ], "name": "Si-Wei Yan" }, { "affs": [ 3 ], "name": "Rui-Xin Li" }, { "affs": [ 4, 5 ], "name": "Qing-Zhen Huang" }, { "affs": [ 6 ], "name": "Yue-Xing Zhang", "orcid": "0000-0002-8510-5033" }, { "affs": [ 7 ], "name": "Yang Ren", "orcid": "0000-0001-9831-6035" }, { "affs": [ 8 ], "name": "Zi-Long Zhao" }, { "affs": [ 9 ], "name": "Ivan da Silva", "orcid": "0000-0002-4472-9675" }, { "affs": [ 10 ], "name": "Li-Jin Wang" }, { "affs": [ 0, 1 ], "name": "Chang-Qing Jin", "orcid": "0000-0001-8097-9156" }, { "affs": [ 0, 1 ], "name": "Zheng-Ying Tian" }, { "affs": [ 2 ], "name": "Han Liang" }, { "affs": [ 0, 1 ], "name": "Yuan-Sha Chen", "orcid": "0000-0002-7291-5088" }, { "affs": [ 3 ], "name": "Quan-Jun Li", "orcid": "0000-0002-4718-4156" }, { "affs": [ 11, 12 ], "name": "Jing Wang", "orcid": "0000-0001-5458-6711" }, { "affs": [ 0, 1 ], "name": "Yun-Zhong Chen", "orcid": "0000-0001-8368-5823" }, { "affs": [ 13 ], "name": "Dao-Peng Zhang", "orcid": "0000-0001-5653-7606" }, { "affs": [ 14 ], "name": "Jia Yan Law", "orcid": "0000-0002-1431-6773" }, { "affs": [ 14 ], "name": "Victorino Franco", "orcid": "0000-0003-3028-6815" }, { "affs": [ 15 ], "name": "Oliver Gutfleisch", "orcid": "0000-0001-8021-3839" }, { "affs": [ 16, 17 ], "name": "Feng-Xia Hu", "orcid": "0000-0003-0383-0213" }, { "affs": [ 18, 19, 20, 21 ], "name": "Bao-Gen Shen" } ], "bibtex": "https://research.draconitic.com/paper/b6bvgrxkb0j4d.bib", "cited_by": 0, "doi": "10.1038/s41467-026-77679-7", "fulltext_url": "https://europepmc.org/articles/PMC13669322", "id": "b6bvgrxkb0j4d", "issns": [ "2041-1723" ], "landing_url": "https://europepmc.org/article/MED/42875452", "language": "eng", "licence": "CC-BY-NC-ND", "licence_label": "CC BY-NC-ND", "licence_source": "article", "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/", "metadata_licence": null, "native_subjects": [ [ "openalex", "2504|Magnetism in coordination complexes" ] ], "openalex": "W7213359545", "pdf_url": "https://europepmc.org/articles/PMC13669322?pdf=render", "pmcid": "PMC13669322", "pmid": "42875452", "published": "2026-09-15", "publisher": null, "ris": "https://research.draconitic.com/paper/b6bvgrxkb0j4d.ris", "sources": [ { "first_seen": "2026-10-30T12:19:18Z", "native_id": "MED:42875452", "source": "europepmc", "url": "https://europepmc.org/article/MED/42875452" } ], "subjects": [ { "field": "chemistry", "origin": "openalex:2504|Magnetism in coordination complexes", "subfield": "materials-polymers" } ], "title": "Colossal and fully reversible barocaloric effect for sustainable cooling in a pressure-sensitive spin-crossover complex.", "title_text": "Colossal and fully reversible barocaloric effect for sustainable cooling in a pressure-sensitive spin-crossover complex.", "type": "peer-reviewed", "updated_at": "2026-10-30T12:19:18Z", "url": "https://research.draconitic.com/paper/b6bvgrxkb0j4d", "venue": "Nature communications", "versions": [] }