A Dendrimer‐Based Electropolymerized Microporous Film: Multifunctional, Reversible, and Highly Sensitive Fluorescent Probe. (5th February 2016)

• Record Type: Journal Article
• Authors: Ma, Hongwei; Li, Feng; Li, Peng; Wang, Hailong; Zhang, Ming; Zhang, Guang; Baumgarten, Martin; Müllen, Klaus
• Is Part Of: Advanced functional materials. Volume 26:Number 12(2016)
• Page Start: 2025
• Page End: 2031
• Publication Date: 2016-02-05
• Subjects: dendrimers -- electropolymerization -- pyrene fluorescent probes -- thin films; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.201504692
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract : A dendrimer PYTPAG2 composed of a central pyrene "core" and four exterior "arms" capped with electroactive triphenylamine is developed as an electroactive precursor to prepare fluorescent films through electropolymerization (EP). The fluorescence emission comes from the central pyrene "core" and the steric hindrance of the exterior "arms" is beneficial for the formation of microporous morphology. The stable and highly cross‐linked fluorescent EP films can be obtained even as free‐standing films. Further, these dendrimer EP films are first studied as the multifunctional fluorescent probe: the emission of EP films exposed to trinitrotoluene vapor is quenched by 82% in 120 s; while the fluorescence is increased to nearly 400% in 120 s upon exposure to benzene vapor, EP films also act as the fluorescent sensor to Fe 3+ in solution and the limit of detection is obtained to be 8.5 × 10 −8 m . All the above detection processes exhibit remarkable reversibility. These excellent performances are attributed to both the specific molecular features of PYTPAG2 and the intrinsic properties of EP films. Abstract : A dendrimer PYTPAG2 is studied as an electroactive precursor to prepare microporous fluorescent films upon electropolymerization (EP), which could be obtained not only on substrates but also as free‐standing films. Further, these fluorescent EP films are studied as the multifunctional fluorescent probe to trinitrotoluene vapor, iron (III) (Fe 3+ ) ion, and benzene vapor with rapid response, high sensitivity and selectivity, and excellent reusability.