Hi,

I have a transient absorption spectroscopy set-up (Laser Flash Photolysis) that can be applied to study the absorption dynamics in millisecond to minute time scale in the visible range. I have a few laser diodes as a pump source (405 nm, 530 nm, 632 nm, 390 nm, 455 nm) that can be used to produce of laser pulses of 3-5 ms duration. I also have a white light source 350 -750 nm, and can give pulses of 3-5 ms duration. The detector is CCD and has very good effeciancy in the visble range.

I would like if anyone knows a commercially available sample (preferable in the solution form) that can be used as a test sample to study the absorption changes in the time scale of my setup, i.e. in the millisecond to minutes scale?

Your suggestion would be very valuable.

Thanks a lot in advance.