Nano-second time-resolved infrared spectrometer

Time-resolved infrared (TRIR) spectroscopy with sub-µs time resolution is powerful for understanding the dynamics of photoexcited molecules in terms of vibrational spectra. By analogy to photography, we take a "snapshot" of the IR spectrum of the reacting molecules with sub-µs resolution. By doing so, reaction intermediates and their structures can be identified. Our TRIR apparatus has the ability to measure not only mid-IR (2000–4000 cm−1) but near-IR region (4000–10000 cm−1), where low-energy electronic transitions and the overtone and the combination band of vibrational transitions are observed.