Luminescent Nanofibers Fabricated from Phenanthroimidazole Derivatives by Organogelation: Fluorescence Response towards Acid with High Performance. Issue 8 (2nd July 2015)

• Record Type: Journal Article
• Authors: Peng, Jiang; Sun, Jingbo; Gong, Peng; Xue, Pengchong; Zhang, Zhenqi; Zhang, Gonghe; Lu, Ran
• Is Part Of: Chemistry, an Asian journal. Volume 10:Issue 8(2015:Aug.)
• Page Start: 1717
• Page End: 1724
• Publication Date: 2015-07-02
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1002/asia.201500299
• Languages: English
• ISSNs: 1861-4728

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Nanofibers based on phenanthroimidazole derivatives <bold>PCC</bold>, <bold>PDC</bold>, and <bold>PSC</bold> were fabricated by organogelation processes, and their fluorescence sensory properties towards acid were investigated. It was found that the emission of <bold>PCC</bold> in the nanofiber‐based film could be quenched significantly upon exposure to gaseous TFA due to the formation of protonated <bold>PCC</bold>, in which ICT (intramolecular charge transfer) would occur. On the other hand, TFA vapor led to the emitting colors of <bold>PDC</bold> and <bold>PSC</bold> in the nanofiber‐based films to turn to yellow and green from sky blue and blue, respectively. Additionally, we found that the decay times of <bold>PCC</bold> were 0.1 s and 1.9 s in probing the saturated vapor of TFA in nanofiber‐based film and in spin‐coated film, respectively. The results suggested that the high surface‐to‐volume ratio and large interspace in the nanofiber‐based networks favored the enhanced adsorption, accumulation, and diffusion of gaseous molecules, resulting in such a high performance.</p> </abstract>