SILOXANE POLYMER OR COMPOSITE APPLICATION IN NITROCOMPOUND CHEMOSENSORS Russian patent published in 2009 - IPC G01N27/12 

FIELD: chemistry.

SUBSTANCE: invention can be used for explosives detection, for atmospheric pollution and environmental quality control/monitoring, for in-place monitoring. Invention concerns application as a sensing material in nitrocompound sensor, of at least one polymer containing one repeating unit of formula (I): where: X and Y stand for single bond or linear hydrocarbon group of 1-50 carbon atoms; R₁ and R₂ stand for hydrogen atom, CN, C(Z)₃, CH(Z)₂, CH₂Z, where Z is halogen atom; NH₂, NHR₃, HR₃R₄ where R₃ and R₄ stand for halogen atom, CH₃ or hydrocarbon chain, linear or branched, saturated or unsaturated, of 2-20 carbon atoms and optionally of one or more heteroatoms and/or functional groups containing at least one heteroatom at least one of R₁ or R₂ is not hydrogen atom, or application of the composite containing the specified polymer and one or more current-conducting fillers. The sensors containing polymer or composite described above as a sensitive material gain many advantages, namely: nitrocompound detectivity, specifically aromatic nitrocompounds, thus maintaining very high sensitivity as these sensors are capable to detect them if concentrated 1 fr./million, even 1/10 fr./million; high response rate and reproducibility; continuous running; performance stability over time; very tolerable service life; production costs are compatible to large-scale production, small amount of polymer or composite (i.e. practically some mg) required for sensor manufacturing; miniature design and, hence, ease of handling and any environmental application.

EFFECT: ensured nitrocompound detectivity reception thus maintaining very high sensitivity; continuous running; performance stability over time; very tolerable service life; reduced production costs.

19 cl, 6 ex, 5 dwg