Changing the metal center in a complex can significantly affect its photochemical properties. The photochemical properties of a metal complex are determined by the electronic structure of the metal center, the nature of the ligands surrounding the metal, and the overall geometry of the complex. When the metal center is changed, the electronic structure, energy levels, and the nature of the excited states can be altered, leading to different photochemical properties.To compare the photochemical properties of a series of metal complexes with different metal centers under identical conditions, we can consider the following factors:1. Absorption spectra: Different metal centers can have different absorption spectra, which means they absorb light at different wavelengths. This can affect the photochemical properties of the complexes, as they may be more or less sensitive to specific wavelengths of light.2. Excited state lifetimes: The lifetime of an excited state is an important factor in determining the photochemical properties of a metal complex. Different metal centers can have different excited state lifetimes, which can affect the efficiency of photochemical reactions.3. Redox potentials: The redox potentials of the metal centers can also influence the photochemical properties of the complexes. Changing the metal center can alter the redox potential, which can affect the ability of the complex to participate in electron transfer reactions.4. Reactivity: Different metal centers can have different reactivity towards various substrates, which can affect the photochemical properties of the complexes. For example, some metal centers may be more prone to undergo photoinduced ligand exchange reactions, while others may be more resistant to such reactions.5. Photostability: The photostability of a metal complex is another important factor to consider when comparing photochemical properties. Some metal centers may be more prone to photodegradation, which can limit their usefulness in photochemical applications.To compare the photochemical properties of a series of metal complexes with different metal centers, one can perform a series of experiments under identical conditions, such as:- Measure the absorption spectra of the complexes to determine their sensitivity to different wavelengths of light.- Measure the excited state lifetimes of the complexes using time-resolved spectroscopy techniques.- Determine the redox potentials of the complexes using electrochemical methods.- Investigate the reactivity of the complexes towards various substrates using standard photochemical reaction setups.- Assess the photostability of the complexes by monitoring their decomposition under continuous light exposure.By comparing these properties, one can gain insights into how changing the metal center in a complex affects its photochemical properties and identify the most suitable metal center for a specific photochemical application.