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ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
Published monthly
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Self-assembly and peripheral guest-binding of two triangular Zn(II) helicates
Juan-Tong Zhao, Wen-Yuan Wu, Yi-Chun Lou, Wei-Jie Cai, and Rong Wan
College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, People’s Republic of China
E-mail: wwy@njtech.edu.cn
Received: 10 August 2023 Accepted: 14 December 2023
Abstract: Two Zn(II) complexes, referred to as helicate 1 and helicate 2, were synthesized using subcomponent self-assembly of zinc(II) trifluoromethanesulfonate (Zn(CF3SO3)2), 2,4,6-tris(3-aminophenoxy)triazine, and either 2-formylpyridine or 3-methyl-2-pyridinecarboxaldehyde in CH3CN solution. The triangular helicate structure of both complexes was verified by 1H NMR and ESI–MS measurements, and the host–guest interactions between the helicates and a number of guest molecules were investigated. It was discovered that the effect of the host–guest interactions significantly changed when the aldehyde component was replaced by 3-methyl-2-pyridinecarboxaldehyde, which suggested that the guest-binding sites may occur around the peripheral apertures of the complex. Additionally, the binding behaviour between helicate 1 and tetraphenylborate guests was further investigated, which allowed for the quantification of the host–guest stoichiometry in a 1:2 ratio.
Keywords: Triangular helicate; Self-assembly; Zinc(II); Host–guest interaction
Full paper is available at www.springerlink.com.
DOI: 10.1007/s11696-023-03279-0
Chemical Papers 78 (5) 2885–2894 (2024)
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