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The 3,5\u2010bis(4\u2010pyridyl)\u20104\u2010amino\u20101,2,4\u2010triazole (BPAT) organic molecule was designed to be used as fluorescence detectors to detect tryptophan molecules for the interaction between the host and the guest. BPAT shows good sensitivity and selectivity towards tryptophan compared with other amino acid molecules. The limit of detection obtained from formula 3\u03b4\/K<jats:sub>SV<\/jats:sub> is considered to be 5.43\u2009\u00d7\u200910<jats:sup>\u22127<\/jats:sup>\u00a0mol\/L. We speculated that this change is mainly caused by the hydrogen bond between tryptophan and the host molecule BPAT. This conjecture was verified by the controlled experiments with other host molecules.<\/jats:p>","DOI":"10.1002\/bio.4481","type":"journal-article","created":{"date-parts":[[2023,3,15]],"date-time":"2023-03-15T00:18:47Z","timestamp":1678839527000},"page":"609-612","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["The hydrogen bond between tryptophan and the host molecule induced fluorescence enhancement"],"prefix":"10.1002","volume":"38","author":[{"given":"Xi","family":"Yang","sequence":"first","affiliation":[{"name":"School of Chemistry and Chemical Engineering Hefei University of Technology  Hefei Anhui China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ting","family":"Xue","sequence":"additional","affiliation":[{"name":"XuanCheng Vocational and Technical college  Xuancheng Anhui 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