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新能源	锂锂矿锂化合物金属锂镍镍矿镍铁精炼镍镍盐高冰镍 MHP 钴电解钴钴粉氯化钴四氧化三钴硫酸钴钴中间品氧化钴碳酸钴钴酸锂锰锰矿电解锰电池级硫酸锰锂电正负极三元前驱体磷酸铁正极材料石油焦针状焦包覆沥青人造石墨硅碳负极硅氧负极电解液隔膜隔膜电解液电芯

我国科研团队成功合成稀土三重键化合物

2025-06-24 17:27:43 来源：北方有色网责任编辑：潘利军

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稀土是重要战略资源，其化学键性质直接影响稀土化合物的特性、功能和技术应用。近日，苏州大学谌宁课题组与清华大学李隽课题组合作，成功实现了长期以来被视作“科研禁区”的稀土三重键化合物的制备，打破了对稀土元素成键能力的传统认知。相关成果已发表在《自然·化学》上。

稀土元素包括钪、钇和15种镧系元素，电子结构呈现出极为复杂、特殊且多样的特点。在稀土化合物中，化学键主要以基于静电作用的离子键形式存在，由于4f轨道的收缩效应和5d轨道的较高能量，稀土元素形成共价键，特别是双重键和三重键的能力十分有限。也正因为这一特性，长久以来，制备出含双重键的镧系稀土化合物已是极为罕见，制备其三重键化合物更是被认为“不可能”。

该研究中，研究团队创新性地利用富勒烯分子笼的空间限域和保护作用，采用改良电弧放电技术，成功制备出首个富勒烯内嵌的稀土元素铈与碳形成的三重键化合物，实现了铈碳三重键的稳定构筑。

研究人员表示，该研究不仅为稀土化学键的研究开拓了新方向，更对稀土化合物和新材料的制备具有重要意义

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