Porosity-driven large amplitude dynamics for nitroaromatic sensing with fluorescent films of alternating D–π–A molecules

Abstract

Very large amplitude nitroaromatic sensing dynamics are observed upon a structural change within an alternating D–π–A chromophore initially configured to promote densely cofacial self-packing at a macromolecular scale.

The arylvinylpyrimidine scaffold: a tunable platform for luminescent and optical materials

“…Exposure to DNT vapors leads to a strong decrease in the emission response of the film. 29 However, the real-time sensing dynamics are strikingly different. While the initial fluorescence signal of 10 decreases by 50% after 430 s, it only takes 13 s for compound 31 (more than one order of magnitude faster) (Fig.…”

Geometry-driven mass transport dynamics within permeable 3D-microstructures fabricated via two-photon polymerization

“…The spectroelectrochemical measurements were carried out at the surface of a semi-transparent platinum gauze working electrode using a PEEK-based microcell in a three-electrode configuration which is described in ref. 23. Similarly to cyclic voltammetry, the spectroelectrochemical measurements were performed in N 2 -saturated ACN with 0.1 M of ( n Bu) 4 NPF 6 .…”

Effect of protonation on the photophysical properties of 4-substituted and 4,7-disubstituted quinazoline push-pull chromophores

“…Push-pull nitrogen heterocyclic systems have also been designed for fluorescence sensing of nitroaromatic explosives. [21][22][23] Although sensitivity to acids has been used primarily for sensing applications, [24][25][26][27] a more recent application concerns white light emission. The protonation of azaheterocyclic push-pull derivatives generally leads to emission quenching.…”