Ageing of thin films used in explosives detection

International audienceThe ageing of fluorescent materials (phenyleneethynylene) has been studied to evaluate there lifetime as chemical sensors and to identify the ageing mechanism

Study of fluorescent piconjugated materials used as nitroaromatics chemosensors

To be able to detect explosives ultra-traces has become a societal need particularly to anticipate terrorist attacks. During the last decade, despite wellstudied heavy analytical techniques, more sensitive and portable new gas-chemosensors have been developed. The sensor principle is based on a sensitive material interacting with the gaseous analyte. These interactions can induce a variation of the intrinsic properties of the material. For example, it can be fluorescence quenching easily identified with a spectrofluorimeter. In this paper, several organic materials have been identified as promising fluorescent explosives sensors and especially as nitroaromatic sensors. These sensors materials are polymers which backbone is a regularly alternated linking of π-conjugated segments (called fluorophores) and chiral unit

Efficient sensing of explosives by using fluorescent highly textured nonporous films of oligophenyleneethynylene derivatives

International audienc