Using UV VIS IR absorbtion data, I found some peaks in the graph. But how to know from where to where the transition happened? Is there any software? or literature data?
you can use spectral analysis software. Here are a few options:
a|e UV-Vis-IR Spectral Software: This software allows you to plot, edit, and analyze multiple UV-Vis absorption spectra. It can help you identify transition ranges by fitting experimental data to calculated spectra2.
Chemissian: This software provides tools for analyzing UV-Vis spectra, including identifying transition ranges and fitting experimental data.