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Among the probes for CO detection, those which respond through fluorescence outputs after activation through Tsuji\u2013Trost reaction are popular. Interestingly, a number of reports in this area have shown that these probes are nonresponsive toward H<jats:sub>2<\/jats:sub>S under the conditions employed. Since these analytes were tested individually, the question of whether H<jats:sub>2<\/jats:sub>S interferes with the generation of Pd(0) species or influences the CO\u2010releasing ability of CORM\u20103 needed scrutiny. To understand this, we have carried out a series of studies using two different probes, namely <jats:bold>Cou\u2010CO<\/jats:bold> and <jats:bold>FL\u2010CO<\/jats:bold>, which give fluorescence responses at 450 nm and 520 nm, respectively, on activation. The results clearly showed large variations in emission intensity in presence of H<jats:sub>2<\/jats:sub>S which can be linked to its interaction with either Pd<jats:sup>2+<\/jats:sup> source or CORM\u20103. These trends were also reflected in the outcome from fluorescence imaging and flow cytometry studies involving A549 cells. Implications of this in analytical studies involving gasotransmitters are discussed in this report.<\/jats:p>","DOI":"10.1002\/asia.202500641","type":"journal-article","created":{"date-parts":[[2025,8,28]],"date-time":"2025-08-28T13:56:20Z","timestamp":1756389380000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Interference of H<sub>2<\/sub>S During CO Detection by Probes Which Respond Through Tsuji\u2013Trost Reaction\u2014Does the Lack of Response Confirm Lack of Interference?"],"prefix":"10.1002","volume":"20","author":[{"given":"Archana Panthalattu","family":"Parambil","sequence":"first","affiliation":[{"name":"Department of Chemistry Indian Institute of Technology Madras  Chennai Tamil Nadu 600036 India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Akila","family":"Kesavan","sequence":"additional","affiliation":[{"name":"Department of Chemistry Indian Institute of Technology Madras  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