Development of a high‐sensitivity, high‐resolution transient absorption spectrophotometer

We have developed a new system of semi‐automatic recording on‐line transient absorption spectrophotometer. Characteristic features of a pulsed dye laser used as the absorption monitoring light have been fully utilized to give an excellent performance with high resolution in both time and spectrum and high sensitivity which allows the use of low concentration samples. Among them, the amplifiability of dye laser was the key to make the whole system very simple and easy to operate. As an example, a precise spectrum of Sn ← S1 absorption of anthracene was measured with this system.