Photophysical properties of poly(triptycene vinylene) derivatives and effect of nitrotoluene exposure

• Published in: Chemical physics letters Vol. 501; no. 1-3; pp. 54 - 58
• Main Authors: Malval, J.P., Leray, I.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 06.12.2010; Elsevier
• Subjects: Chemical Sciences; Material chemistry; Polymers
• ISSN: 0009-2614; 1873-4448
• DOI: 10.1016/j.cplett.2010.10.036

[Display omitted] ► The photophysical properties of two conjugated polymers containing triptycene group were studied. ► A fluorescence quenching is observed upon DNT exposure because of a dynamic electron transfer process from the polymer to the quencher. ► The reversibility of the quenching process has been demonstrated by a simple air flow method which allows the re-use of the sensor for cycling measurement of the nitroaromatic analyte. The photophysical properties of two conjugated polymers containing triptycene group were studied. These systems are highly fluorescent and time-resolved fluorescent measurements show that there are different types of excited species whose relative population is correlated to a heterogeneous collection of chromophore sites. A fluorescence quenching is observed upon DNT exposure because of a dynamic electron transfer process from the polymer to the quencher. The reversibility of the quenching process has been demonstrated by a simple air flow method which allows the re-use of the sensor for cycling measurement of the nitroaromatic analyte.