Abstract
AbstractAn ultrasensitive detecting system coupled with either a lock‐in or Fourier transform technique has been used to detect near‐infrared (1000‐2500 nm) metastable species in room temperature solutions. These species include O2(1Δg), O2(1σ+g), the solvent induced satellite peak of molecular singlet oxygen (1Δg) emission, and the triplet state of bis(triisobutylsiloxy)silicon‐2,‐3‐naphthalocyanine (SilNC). Using the O2(1Δg) emission in benzene as a standard, the quantum yield and radiative decay rate of SiINC triplet state have been determined. Depending on types of spectral acquisition, special techniques such as phase‐distinguishing and step scan capabilities were utilized. Their advantages and disadvantages are discussed.
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