{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,7]],"date-time":"2026-03-07T12:56:13Z","timestamp":1772888173553,"version":"3.50.1"},"reference-count":44,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2013,11,19]],"date-time":"2013-11-19T00:00:00Z","timestamp":1384819200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A novel zinc porphyrin-containing polyimide (ZPCPI) nanofibrous membrane for rapid and reversible detection of trace amounts of pyridine vapor is described.  The membrane displays a distinct color change, as well as dramatic variations in absorption and fluorescent emission spectra, upon exposure to pyridine vapor. This condition allows the detection of the analyte at concentrations as low as 0.041 ppm. The vapochromic  and spectrophotometric responses of the membrane are attributed to the formation  of the ZPCPI-pyridine complex upon axial coordination. From surface plasmon  resonance analysis, the affinity constant of ZPCPI-pyridine complex was calculated to be  (3.98 \u00b1 0.25) \u00d7 104 L\u00b7mol\u22121. The ZPCPI nanofibrous membrane also showed excellent selectivity for pyridine vapor over other common amines, confirming its applicability in the manufacture of pyridine-sensitive gas sensors.<\/jats:p>","DOI":"10.3390\/s131115758","type":"journal-article","created":{"date-parts":[[2013,11,19]],"date-time":"2013-11-19T12:33:03Z","timestamp":1384864383000},"page":"15758-15769","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":32,"title":["A Novel Porphyrin-Containing Polyimide Nanofibrous Membrane for Colorimetric and Fluorometric Detection of Pyridine Vapor"],"prefix":"10.3390","volume":"13","author":[{"given":"Yuanyuan","family":"Lv","sequence":"first","affiliation":[{"name":"School of Medicine, Zhejiang University City College, Hangzhou 310015, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yani","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Medicine, Zhejiang University City College, Hangzhou 310015, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yanglong","family":"Du","sequence":"additional","affiliation":[{"name":"School of Medicine, Zhejiang University City College, Hangzhou 310015, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jiayao","family":"Xu","sequence":"additional","affiliation":[{"name":"School of Medicine, Zhejiang University City College, Hangzhou 310015, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Junbo","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Medicine, Zhejiang University City College, Hangzhou 310015, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2013,11,19]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"41","DOI":"10.1016\/j.snb.2012.10.046","article-title":"Schiff-base as highly sensitive and reversible chemosensors for HCl gas","volume":"177","author":"Xie","year":"2013","journal-title":"Sens. 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