Ling Jie, Lu Huangjie, Wang Yaxing, Johnson Kenndra, Wang Shuao
Department of Chemistry and Biochemistry, Claflin University Orangeburg SC 29115 USA
State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institution, Soochow University Suzhou 215123 China.
RSC Adv. 2018 Oct 12;8(61):34947-34953. doi: 10.1039/c8ra06330c. eCollection 2018 Oct 10.
Three one-dimensional chain structures of uranium(iv) hexanuclear clusters have been synthesized under hydrothermal/solvothermal conditions. Crystallographic studies disclose that the structures of [UO(OH)(HCOO)(HO)]·3HO (1a), [UO(OH)(HCOO)(HCOOH)(HO)]·3HO (1b) and (HCN)[UO(OH)(HCOO)(HCN)] (2) contain a U(iv) hexanulear core [U( -OH)( -O)] which is decorated by terminal HCOO ligands and water (1a, 1b), HCOOH (1b) or pyridine molecules (2). These hexanuclear U(iv) clusters are further linked into zig-zag 1-D chain structures bridging HCOO ligands. UV-vis-NIR spectra, together with bond valence calculations, indicate that all U atoms in three compounds exist as U(iv). Magnetic susceptibility data reveal that compound 2 exhibits paramagnetic characteristics.
在水热/溶剂热条件下合成了三种铀（IV）六核簇的一维链状结构。晶体学研究表明，[UO(OH)(HCOO)(H₂O)]·3H₂O (1a)、[UO(OH)(HCOO)(HCOOH)(H₂O)]·3H₂O (1b) 和 (HCN)[UO(OH)(HCOO)(HCN)] (2) 的结构包含一个U(IV) 六核核心 [U₆(μ₃-OH)₈(μ₂-O)₆]，该核心由末端HCOO配体和水（1a、1b）、HCOOH（1b）或吡啶分子（2）修饰。这些六核U(IV)簇进一步连接成跨越HCOO配体的之字形一维链状结构。紫外-可见-近红外光谱以及键价计算表明，三种化合物中的所有U原子均以U(IV)形式存在。磁化率数据表明化合物2具有顺磁特性。
