Synthesis and NMR studies of silver complexes with octaaza Schiff-base cryptands and the structure of a polymeric silver cryptate

Shu Yan Yu*, Qin Hui Luo, Biao Wu, Xiao Ying Huang, Tian Lu Sheng, Xin Tao Wu, Da Xu Wu

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

10 引用 (Scopus)

摘要

Four binuclear and one polymeric silver complex of octaaza Schiff-base cryptands were synthesized by [2 + 3] condensation of tris(3-aminopropyl)amine (trpn) or tris(2-aminoethyl)amine (tren) with 5-R-2-methoxy-1,3-benzenedicarboxaldehyde (R = OCH3, CH3, Br or Ph) in the presence of excess of Ag1 ion. The polynucleating and extended coordination nature of the trpn-derived cryptand L1 (R = OCH3) was established by X-ray structure of [{Ag(Ag2L1)}n][(ClO4) 3·2CH3CN·CH3OH·2H 2O]n. The polymeric cation [{Ag (Ag2L1)}n] can be described as the bridge-twisted binuclear (Ag2L1) units linked together by silver atoms via a linear N - Ag - N bridging bonding mode in alternate (inward, outward) conformations relative to the benzene rings, resulting in an infinite single helical chain. The benzene rings in the helix chain are almost parallel to each other, with a π - π stacking distance of 3.84 Å. The coordination behaviour of cryptands have also been studied by NMR spectroscopy in solution.

源语言英语
页(从-至)453-461
页数9
期刊Polyhedron
16
3
DOI
出版状态已出版 - 1997
已对外发布

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