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We describe self\u2010assembled monolayers (SAMs) of novel <jats:italic>semiaza<\/jats:italic>\u2010bambus[6]urils (<jats:italic>semiaza<\/jats:italic>\u2010BUs) equipped with thioethers or disulfide (dithiolane) functionalities as surface\u2010anchoring groups on gold electrodes. Cyclic voltammetry (CV) with Fe(CN)<jats:sub>6<\/jats:sub><jats:sup>3\u2212\/4\u2212<\/jats:sup> as a redox probe, together with X\u2010ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM) and ellipsometry, were employed to characterize the interactions at the interface between the anchoring groups and the metal substrate. Data showed that the anion receptors\u2032 packing on the gold strongly depends on the anchoring group. As a result, SAMs of BUs with lipoic amide side chains show a concentration\u2010dependent layer thickness. The BU SAMs are extremely stable on repeated electrochemical potential scans and can selectively recognize perchlorate anions. Our electrochemical impedance spectroscopy (EIS) studies indicated that semiaza\u2010BU equipped with the lipoic amide side chains binds perchlorate (2\u2013100\u2005mM) preferentially over other anions such as F<jats:sup>\u2212<\/jats:sup>, Cl<jats:sup>\u2212<\/jats:sup>, I<jats:sup>\u2212<\/jats:sup>, AcO<jats:sup>\u2212<\/jats:sup>, H<jats:sub>2<\/jats:sub>PO<jats:sub>4<\/jats:sub><jats:sup>\u2212<\/jats:sup>, HPO<jats:sub>4<\/jats:sub><jats:sup>2\u2212<\/jats:sup>, SO<jats:sub>4<\/jats:sub><jats:sup>2\u2212<\/jats:sup>, NO<jats:sub>2<\/jats:sub><jats:sup>\u2212<\/jats:sup>, NO<jats:sub>3<\/jats:sub><jats:sup>\u2212<\/jats:sup>, or CO<jats:sub>3<\/jats:sub><jats:sup>2\u2212<\/jats:sup>. The resistance performance is 10 to 100\u2005times more efficient than SAMs containing all other tested anions.<\/jats:p>","DOI":"10.1002\/chem.202302968","type":"journal-article","created":{"date-parts":[[2023,10,23]],"date-time":"2023-10-23T11:49:56Z","timestamp":1698061796000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Selective Perchlorate Sensing Using Electrochemical Impedance Spectroscopy with Self\u2010Assembled Monolayers of <i>semiaza<\/i>\u2010Bambusurils"],"prefix":"10.1002","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0790-5377","authenticated-orcid":false,"given":"Raman","family":"Khurana","sequence":"first","affiliation":[{"name":"Department of Natural Sciences The Open University of Israel  1 University Road Ra'anana 4353701 Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fuad","family":"Alami","sequence":"additional","affiliation":[{"name":"Hybrid Materials for Opto-Electronics Group MESA+ Institute Faculty of Science and Technology University of Twente  Drienerlolaan 5 7522 NB Enschede The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3435-4600","authenticated-orcid":false,"given":"Christian A.","family":"Nijhuis","sequence":"additional","affiliation":[{"name":"Hybrid Materials for Opto-Electronics Group MESA+ Institute Faculty of Science and Technology University of Twente  Drienerlolaan 5 7522 NB Enschede The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ehud","family":"Keinan","sequence":"additional","affiliation":[{"name":"Faculty of Chemistry Technion-Israel Institute of Technology  Technion Haifa Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4596-9179","authenticated-orcid":false,"given":"Jurriaan","family":"Huskens","sequence":"additional","affiliation":[{"name":"Molecular Nanofabrication Group MESA+ Institute Faculty of Science and Technology University of Twente  Drienerlolaan 5 7522 NB Enschede The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1048-1947","authenticated-orcid":false,"given":"Ofer","family":"Reany","sequence":"additional","affiliation":[{"name":"Department of Natural Sciences The Open University of Israel  1 University Road Ra'anana 4353701 Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2023,11,23]]},"reference":[{"key":"e_1_2_8_1_1","doi-asserted-by":"publisher","DOI":"10.1080\/10915810490275044"},{"key":"e_1_2_8_2_1","doi-asserted-by":"crossref","first-page":"89","DOI":"10.1016\/S0031-6997(24)01350-4","volume":"50","author":"Wolff J.","year":"1998","journal-title":"Pharmacol. 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