Many compounds synthesized in our labs are strongly colored. Hence, absorption spectroscopy in the visible region is extremely useful for the characterization of such compounds. As one focus of our research is the generation of visible and NIR electrochromic dyes, the combination of electrochemistry and UV-vis-NIR spectroscopy (spectroelectrochemistry) is widely used in our labs. This combination allows use to determine optical switching in the visible and the NIR region. Additionally, we use UV-vis-NIR spectroelectrochemistry to gain information on the electronic structures of the compounds in their various redox states, to investigate electron transfer processes, and to investigate electrocatalytic reaction mechanisms.