School of Medicine, Zhejiang University City College, Hangzhou 310015, China.
Sensors (Basel). 2013 Nov 19;13(11):15758-69. doi: 10.3390/s131115758.
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.
一种新型含锌卟啉聚酰亚胺（ZPCPI）纳米纤维膜，可用于快速、可逆检测痕量吡啶蒸气。当暴露于吡啶蒸气时，该膜会发生明显的颜色变化，以及吸收和荧光发射光谱的剧烈变化。在这种情况下，即使在低至 0.041ppm 的浓度下也能检测到分析物。该膜的蒸气致变色和分光光度响应归因于轴向配位形成的 ZPCPI-吡啶配合物。通过表面等离子体共振分析，计算出 ZPCPI-吡啶配合物的亲和常数为（3.98 ± 0.25）×104L·mol-1。ZPCPI 纳米纤维膜对吡啶蒸气表现出优异的选择性，优于其他常见的胺类，证实其可用于制造对吡啶敏感的气体传感器。
