Hydrogen Peroxide Vapor Sensing with Organic Core/Sheath Nanowire Optical Waveguides

Continuing efforts have been focused on detecting H 2 O 2 by different strategies such as infrared/Raman spectroscopy, [ 4 ] mass spectrometry, [ 5 ] electrochemical method, [ 6 ] colorimetric [ 7 ] and fl uorimetric detection. [ 8 ] Generally these methods either require expensive bulky equipment and tedious sample preparation, or have poor selectivity and limits of detection. Therefore, the development of contrast agents that allow the expedient detection of H 2 O 2 at low concentration is in demand. Peroxalate ester and its derivatives are typical chemiluminogenic compounds highly sensitive to H 2 O 2 . [ 9 ] The reaction between peroxalate ester groups and H 2 O 2 can generate a high-energy intermediate that may transfer energy to the fl uorescent dye, resulting in effi cient luminescence. This has been proved to be a promising strategy for the expedient and sensitive detecting of H 2 O 2 . [ 1 , 10 ]