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The six\u2010cyclic pillar[5]\u2010crown also showed greater binding ability of host\u2010guest with bis(pyridinium) derivatives than conventional alkoxy pillar[5]arenes that illustrated through <jats:sup>1<\/jats:sup>H NMR titration spectroscopic experiment in acetone\u2010d6\/CDCl<jats:sub>3<\/jats:sub> (1\u2009:\u20091) and UV\u2010vis titration experiments in CHCl<jats:sub>3<\/jats:sub> at room temperature. The five benzocrown ethers at the periphery were able to bind metal cations by <jats:sup>1<\/jats:sup>H NMR titration spectroscopic experiment in CD<jats:sub>2<\/jats:sub>Cl<jats:sub>2<\/jats:sub>\/methanol\u2010d4(9\u2009:\u20091).<\/jats:p>","DOI":"10.1002\/asia.202400554","type":"journal-article","created":{"date-parts":[[2024,7,2]],"date-time":"2024-07-02T23:34:10Z","timestamp":1719963250000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Six\u2010Cyclic Crown Ether\u2010Type Pillar[5]Arene: Enhanced Binding Ability to Bispyridinium Derivatives"],"prefix":"10.1002","volume":"19","author":[{"given":"Huai\u2010Li","family":"Wu","sequence":"first","affiliation":[{"name":"College of Chemistry Zhengzhou University Department  100 Kexue Street Zhengzhou 450001 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