Thirunavukkarasu Thangavel, Nour-el-Islam Belmouri, Catherine Charles, Ahmad Hobballah, Longhe Li, Carlos J. Gómez-García, Sébastien Pillet, Kamel Boukheddaden* and Smail Triki*,
{"title":"基于功能化三唑配体的中性双核配合物的协同自旋交叉","authors":"Thirunavukkarasu Thangavel, Nour-el-Islam Belmouri, Catherine Charles, Ahmad Hobballah, Longhe Li, Carlos J. Gómez-García, Sébastien Pillet, Kamel Boukheddaden* and Smail Triki*, ","doi":"10.1021/acs.cgd.5c0015810.1021/acs.cgd.5c00158","DOIUrl":null,"url":null,"abstract":"<p >A novel spin-crossover (SCO) dinuclear complex, [Fe<sub>2</sub>(μ<sub>2</sub>-cp-trz)<sub>3</sub>(cp-trz)<sub>2</sub>(tcm)<sub>4</sub>] (cp-trz = 4-cyclo-pentyl-1,2,4-triazole, tcm- = tricyanomethanide anion), was synthesized and thoroughly characterized. Crystallographic analyses at 250 and 180 K revealed a centrosymmetric dinuclear structure with Fe(II) centers bridged by triazole ligands. The complex exhibits a cooperative hysteretic thermally induced abrupt one-step spin transition between high-spin (HS) and low-spin (LS) states. Magnetic measurements (Magn), X-rays diffraction (XRD), and optical microscopy (OM) show the following switching temperatures: <i>T</i><sub>1/2↓</sub><sup>Magn</sup> = 202 K and <i>T</i><sub>1/2↑</sub><sup>Magn</sup> = 212 K, and <i>T</i><sub>1/2↓</sub><sup>OM</sup> ≃ <i>T</i><sub>1/2↓</sub><sup>XRD</sup> = 203 K and <i>T</i><sub>1/2↑</sub><sup>OM</sup> ≃ <i>T</i><sub>1/2↑</sub><sup>XRD</sup> = 207 K. Moreover, structural and OM studies reveal significant anisotropic lattice changes, driven by strong hydrogen bonding along the <i>c</i> axis, which underpins the cooperative behavior of the SCO transition, and propagation of the HS/LS interface along the spin transition.</p>","PeriodicalId":34,"journal":{"name":"Crystal Growth & Design","volume":"25 8","pages":"2674–2682 2674–2682"},"PeriodicalIF":3.2000,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Cooperative Spin-Crossover in a Neutral Dinuclear Complex Based on a Functionalized Triazole Ligand\",\"authors\":\"Thirunavukkarasu Thangavel, Nour-el-Islam Belmouri, Catherine Charles, Ahmad Hobballah, Longhe Li, Carlos J. Gómez-García, Sébastien Pillet, Kamel Boukheddaden* and Smail Triki*, \",\"doi\":\"10.1021/acs.cgd.5c0015810.1021/acs.cgd.5c00158\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >A novel spin-crossover (SCO) dinuclear complex, [Fe<sub>2</sub>(μ<sub>2</sub>-cp-trz)<sub>3</sub>(cp-trz)<sub>2</sub>(tcm)<sub>4</sub>] (cp-trz = 4-cyclo-pentyl-1,2,4-triazole, tcm- = tricyanomethanide anion), was synthesized and thoroughly characterized. Crystallographic analyses at 250 and 180 K revealed a centrosymmetric dinuclear structure with Fe(II) centers bridged by triazole ligands. The complex exhibits a cooperative hysteretic thermally induced abrupt one-step spin transition between high-spin (HS) and low-spin (LS) states. Magnetic measurements (Magn), X-rays diffraction (XRD), and optical microscopy (OM) show the following switching temperatures: <i>T</i><sub>1/2↓</sub><sup>Magn</sup> = 202 K and <i>T</i><sub>1/2↑</sub><sup>Magn</sup> = 212 K, and <i>T</i><sub>1/2↓</sub><sup>OM</sup> ≃ <i>T</i><sub>1/2↓</sub><sup>XRD</sup> = 203 K and <i>T</i><sub>1/2↑</sub><sup>OM</sup> ≃ <i>T</i><sub>1/2↑</sub><sup>XRD</sup> = 207 K. Moreover, structural and OM studies reveal significant anisotropic lattice changes, driven by strong hydrogen bonding along the <i>c</i> axis, which underpins the cooperative behavior of the SCO transition, and propagation of the HS/LS interface along the spin transition.</p>\",\"PeriodicalId\":34,\"journal\":{\"name\":\"Crystal Growth & Design\",\"volume\":\"25 8\",\"pages\":\"2674–2682 2674–2682\"},\"PeriodicalIF\":3.2000,\"publicationDate\":\"2025-03-26\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Crystal Growth & Design\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://pubs.acs.org/doi/10.1021/acs.cgd.5c00158\",\"RegionNum\":2,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Crystal Growth & Design","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.cgd.5c00158","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Cooperative Spin-Crossover in a Neutral Dinuclear Complex Based on a Functionalized Triazole Ligand
A novel spin-crossover (SCO) dinuclear complex, [Fe2(μ2-cp-trz)3(cp-trz)2(tcm)4] (cp-trz = 4-cyclo-pentyl-1,2,4-triazole, tcm- = tricyanomethanide anion), was synthesized and thoroughly characterized. Crystallographic analyses at 250 and 180 K revealed a centrosymmetric dinuclear structure with Fe(II) centers bridged by triazole ligands. The complex exhibits a cooperative hysteretic thermally induced abrupt one-step spin transition between high-spin (HS) and low-spin (LS) states. Magnetic measurements (Magn), X-rays diffraction (XRD), and optical microscopy (OM) show the following switching temperatures: T1/2↓Magn = 202 K and T1/2↑Magn = 212 K, and T1/2↓OM ≃ T1/2↓XRD = 203 K and T1/2↑OM ≃ T1/2↑XRD = 207 K. Moreover, structural and OM studies reveal significant anisotropic lattice changes, driven by strong hydrogen bonding along the c axis, which underpins the cooperative behavior of the SCO transition, and propagation of the HS/LS interface along the spin transition.
期刊介绍：
The aim of Crystal Growth & Design is to stimulate crossfertilization of knowledge among scientists and engineers working in the fields of crystal growth, crystal engineering, and the industrial application of crystalline materials.
Crystal Growth & Design publishes theoretical and experimental studies of the physical, chemical, and biological phenomena and processes related to the design, growth, and application of crystalline materials. Synergistic approaches originating from different disciplines and technologies and integrating the fields of crystal growth, crystal engineering, intermolecular interactions, and industrial application are encouraged.
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