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In this work, luminescence vapochromism of carbazole\u2010pyridinium\u2010based organic salts with a general structure of <jats:bold>(CzPy)<jats:italic>X<\/jats:italic><\/jats:bold> (<jats:bold>CzPy<jats:sup>+<\/jats:sup><\/jats:bold>=2,3\u2010di(9H\u2010carbazol\u20109\u2010yl)pyridinium ion; <jats:italic>X<\/jats:italic>=Cl, Br or I) is reported. It was found that <jats:bold>(CzPy)<jats:italic>X<\/jats:italic><\/jats:bold> compounds form J\u2010aggregates, which rearranged back to monomeric form upon exposure to methanol, ethanol, acetone, and water vapors. In contrast, acetonitrile was found to promote the J\u2010aggregation in <jats:bold>(CzPy)<jats:italic>X<\/jats:italic><\/jats:bold> compounds by occupying the voids in their crystal lattice and pushing cations closer together. It was further demonstrated that the efficiency of J\u2010aggregation in <jats:bold>(CzPy)<jats:italic>X<\/jats:italic><\/jats:bold> compounds depends on the size of the anion, which was employed to realize dynamic luminescence vapochromism, with vapochromic response times ranging from a couple of minutes in <jats:bold>(CzPy)Cl<\/jats:bold> to more than an hour in <jats:bold>(CzPy)I<\/jats:bold>. In addition, <jats:bold>(CzPy)<jats:italic>X<\/jats:italic><\/jats:bold> compounds exhibited high melting points of about 250\u2009\u00b0C and excellent thermal stability. <jats:bold>(CzPy)Cl<\/jats:bold> and <jats:bold>(CzPy)Br<\/jats:bold> have also shown good photoluminescence quantum yields at room temperature in a solid state.<\/jats:p>","DOI":"10.1002\/chem.202402777","type":"journal-article","created":{"date-parts":[[2024,9,27]],"date-time":"2024-09-27T02:24:12Z","timestamp":1727403852000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Dynamic Luminescence Vapochromism of Pyridinium\u2010Based Organic Salts"],"prefix":"10.1002","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1023-2086","authenticated-orcid":false,"given":"Verner","family":"S\u00e4\u00e4sk","sequence":"first","affiliation":[{"name":"Institute for Materials Chemistry and Engineering Kyushu University  CE41, 744 Motooka Nishi-ku, Fukuoka 819\u20130395 Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ayano","family":"Abe","sequence":"additional","affiliation":[{"name":"Department of Applied Chemistry Kyushu University  744 Motooka Nishi-ku, Fukuoka 819\u20130395 Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yohei","family":"Kametani","sequence":"additional","affiliation":[{"name":"Institute for Materials Chemistry and Engineering Kyushu University  CE41, 744 Motooka Nishi-ku, Fukuoka 819\u20130395 Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2054-9845","authenticated-orcid":false,"given":"Yoshihito","family":"Shiota","sequence":"additional","affiliation":[{"name":"Institute for Materials Chemistry and Engineering Kyushu University  CE41, 744 Motooka Nishi-ku, Fukuoka 819\u20130395 Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Osamu","family":"Sato","sequence":"additional","affiliation":[{"name":"Institute for Materials Chemistry and Engineering Kyushu University  CE41, 744 Motooka Nishi-ku, Fukuoka 819\u20130395 Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6117-9604","authenticated-orcid":false,"given":"Chihaya","family":"Adachi","sequence":"additional","affiliation":[{"name":"Department of Applied Chemistry Kyushu University  744 Motooka Nishi-ku, Fukuoka 819\u20130395 Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2024,10,31]]},"reference":[{"key":"e_1_2_8_1_1","unstructured":"C.\u2005C. 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