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通过金-硫自组装形成的密堆积硝酰基氮氧化物自由基：强铁磁耦合

Close-packed nitronyl nitroxide radicals by Au-S self-assembly: strong ferromagnetic coupling.

作者信息

Xu Zhipeng, Qin Yongliang, Wei Dongdong, Jin Jie, Zheng Long, Xu Jie, Liu Hui, Chen Ranran, Wang Di

机构信息

School of Materials Science and Chemical Engineering, Anhui Jianzhu University Hefei 230601 China

Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, Hefei Institutes of Physical Science, Chinese Academy of Sciences Hefei Anhui 230031 China.

出版信息

RSC Adv. 2024 Sep 2;14(38):27789-27798. doi: 10.1039/d4ra04506h. eCollection 2024 Aug 29.

DOI:10.1039/d4ra04506h
PMID:39224652
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11367621/
Abstract

The study of the magnetism of tightly arranged nitronyl nitroxide (NN) radicals Au-S self-assembly is interesting. In this study, a series of radicals (S-NN, D-NN, BS-NN, BD-NN) along with two types of nanomaterials (S-NPs, D-NPs) were synthesized. NN was chosen for the magnetic units. Their structures have been successfully synthesized and analyzed. The spin magnetic properties were characterized by electron paramagnetic resonance (EPR) and superconducting quantum interference device (SQUID) measurement. The analysis revealed that the self-assembled NN formed Au-S bonds exhibits high packing density. Furthermore, it was gratifying to observe that the AuNPs exhibit ferromagnetism after the surface modification by NN. This results in strong ferromagnetic exchange interactions of S-NPs and D-NPs :  = +279.715 K and = +254.913 K, respectively.

摘要

对紧密排列的硝酮亚硝基氧化物（NN）自由基金硫自组装的磁性研究很有趣。在本研究中，合成了一系列自由基（S-NN、D-NN、BS-NN、BD-NN）以及两种类型的纳米材料（S-NPs、D-NPs）。选择NN作为磁性单元。它们的结构已成功合成并分析。通过电子顺磁共振（EPR）和超导量子干涉装置（SQUID）测量对自旋磁性能进行了表征。分析表明，形成金硫键的自组装NN具有高堆积密度。此外，令人欣慰的是，通过NN进行表面修饰后，金纳米颗粒表现出铁磁性。这导致S-NPs和D-NPs分别具有强铁磁交换相互作用： = +279.715 K和 = +254.913 K。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9737/11367621/5755c825bfad/d4ra04506h-f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9737/11367621/9f400be2f5dc/d4ra04506h-f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9737/11367621/a45ceb7134e6/d4ra04506h-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9737/11367621/3d7076aee87c/d4ra04506h-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9737/11367621/5755c825bfad/d4ra04506h-f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9737/11367621/9f400be2f5dc/d4ra04506h-f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9737/11367621/935aeda78fb6/d4ra04506h-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9737/11367621/7044d6ae796a/d4ra04506h-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9737/11367621/0421f634cb4e/d4ra04506h-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9737/11367621/4c729b0146c5/d4ra04506h-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9737/11367621/a45ceb7134e6/d4ra04506h-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9737/11367621/3d7076aee87c/d4ra04506h-f9.jpg
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A Molecule Having 13 Unpaired Electrons: Magnetic Property of a Gadolinium(III) Complex Coordinated with Six Nitronyl Nitroxide Radicals.
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