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Here, a new 2D semiconducting Cu(I) coordination polymer (CP) with 1,4\u2010di(1H\u20101,2,4\u2010triazol\u20101\u2010yl)benzene (1,4\u2010TzB) ligand is reported. The CP1 consists of a Cu<jats:sub>2<\/jats:sub>I<jats:sub>2<\/jats:sub> secondary building unit bridged by 1,4\u2010TzB, and has high stability as well as semiconducting properties. The chemiresistive sensor, developed by a facile drop\u2010casting method derived from CP1, demonstrates a response value of 66.7 at 100\u00a0ppm on methanol exposure, accompanied by swift transient (response and recovery time 17.5 and 34.2\u00a0s, respectively) behavior. In addition, the developed sensor displays ultra\u2010high selectivity toward methanol over other volatile organic compounds , boasting LOD and LOQ values of 1.22 and 4.02 ppb, respectively. The CP is found to be a state\u2010of\u2010the\u2010art chemiresistive sensor with ultra\u2010high sensitivity and selectivity toward methanol at room temperature.<\/jats:p>","DOI":"10.1002\/smll.202311448","type":"journal-article","created":{"date-parts":[[2024,2,8]],"date-time":"2024-02-08T02:40:27Z","timestamp":1707360027000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Semiconducting 2D Copper(I) Iodide Coordination Polymer as a Potential Chemiresistive Sensor for Methanol"],"prefix":"10.1002","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-7744-8618","authenticated-orcid":false,"given":"Shivendu","family":"Mishra","sequence":"first","affiliation":[{"name":"Department of Chemistry Indian Institute of Technology Indore  Indore Madhya Pradesh 453552 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