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Room‐Temperature Near‐Infrared Metastable Species Measured by Phase‐Sensitive Lock‐in and Fourier Transform Techniques
Author(s) -
Chou PiTai,
Chen YounChan,
Chen ShuJuan,
Lee MinZen,
Wei ChingYen,
Wen TsaiChuan
Publication year - 1998
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.199800075
Subject(s) - chemistry , metastability , infrared , triplet state , singlet state , fourier transform infrared spectroscopy , fourier transform , analytical chemistry (journal) , quantum yield , silicon , phase (matter) , radiative transfer , photochemistry , excited state , atomic physics , molecule , fluorescence , optics , organic chemistry , mathematical analysis , mathematics , physics
An 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 O 2 ( 1 Δ g ), O 2 ( 1 σ + g ), the solvent induced satellite peak of molecular singlet oxygen ( 1 Δ g ) emission, and the triplet state of bis(triisobutylsiloxy)silicon‐2,‐3‐naphthalocyanine (SilNC). Using the O 2 ( 1 Δ g ) 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.