In situ synthesized homochiral dysprosium-oxo clusters with threonine Schiff bases

作者：Peng, Song; Ouyang, Xiaoming; Wang, Yihan; Teng, Qinghu^*; Li, Yan; Zhang, Xiuqing; Hu, Zhaobo; Wang, Kai^*; Liang, Fupei^*

来源：CHINESE CHEMICAL LETTERS, 2023, 34(8): 108044.

DOI：10.1016/j.cclet.2022.108044

• Chirality
• Lanthanide-oxo cluster
• In situ synthesis
• Threonine Schiff bases
• Hydrolysis
• Magnetic properties

Chiral high-nuclearity lanthanide (4f) clusters have shown fantastic properties in various fields. However, their synthesis is still of great challenge. Herein, we report two pairs of enantiomers of high-nuclearity Dy-oxo clusters synthesized through in situ strategy. They are [Dy18(R/SHftp)4 (R/SH2btp)4(& mu;2- OH)8(& mu;3-OH)20(& mu;6-O)(NO3)4(& mu;-H2O)8] & BULL;[solvents] ( 1R and 1S ) and [Dy9(R/SHftp)2 (R/SH2btp)2(OAc)6(& mu;3- OH)10(H2O)6](OAc) & BULL;[solvents] ( 2R and 2S ), where R/SHftp2 - and R/SH2btp3 - represent in situ formed 2-formyl-6-[N-( threonine )iminomethyl]-4-methylphenol and 2,6-bis[N-(threonine)iminomethyl]-4-methylphenol anions, respectively. These in situ formed clusters were endowed with not only ho-mochirality via introducing R/SHftp2 - and R/SH2btp3 - ligands, but also rich oxo-bridges by controlling the hydrolysis of Dy III ions. Different anions from Dy III salts further induced structural variation between two sets of clusters. 1R and 1S feature an unprecedent four-blade propeller shaped {Dy18} core, whose centered octahedral {Dy6} unit are surrounded by four triangular {Dy3} units. Strikingly, they represent the second largest chiral 4f cluster species so far. 2R and 2S display a sandglass-like {Dy9} skeleton that consist of two square pyramid {Dy5} units sharing a Dy III vertex. Magnetic investigation revealed possible antiferromagnetic interactions between the DyIII centers in these clusters.& COPY; 2023 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.

• 单位
  江西理工大学; 桂林理工大学