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Sensors 2013, 13(11), 15758-15769; doi:10.3390/s131115758
Article

A Novel Porphyrin-Containing Polyimide Nanofibrous Membrane for Colorimetric and Fluorometric Detection of Pyridine Vapor

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Received: 16 October 2013; in revised form: 28 October 2013 / Accepted: 30 October 2013 / Published: 19 November 2013
(This article belongs to the Section Physical Sensors)
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Abstract: 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 ± 0.25) × 104 L·mol−1. 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.
Keywords: zinc porphyrin; nanofibrous membrane; colorimetric sensor; fluorometric sensor; pyridine vapor zinc porphyrin; nanofibrous membrane; colorimetric sensor; fluorometric sensor; pyridine vapor
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Lv, Y.; Zhang, Y.; Du, Y.; Xu, J.; Wang, J. A Novel Porphyrin-Containing Polyimide Nanofibrous Membrane for Colorimetric and Fluorometric Detection of Pyridine Vapor. Sensors 2013, 13, 15758-15769.

AMA Style

Lv Y, Zhang Y, Du Y, Xu J, Wang J. A Novel Porphyrin-Containing Polyimide Nanofibrous Membrane for Colorimetric and Fluorometric Detection of Pyridine Vapor. Sensors. 2013; 13(11):15758-15769.

Chicago/Turabian Style

Lv, Yuanyuan; Zhang, Yani; Du, Yanglong; Xu, Jiayao; Wang, Junbo. 2013. "A Novel Porphyrin-Containing Polyimide Nanofibrous Membrane for Colorimetric and Fluorometric Detection of Pyridine Vapor." Sensors 13, no. 11: 15758-15769.


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