Question

Let’s say that you have a solvatochromic compound that appears red in a solvent. You dissolve the compound in another solvent and it changes to an orange color. Would this be considered a hypsochromic or bathochromic shift? Would the solvent be more polar or less than the first solvent? Explain

Answer 1

Hypsochromic compound, More polar solvent

Step-by-step explanation:

Hypsochromic shift refers to the shift of solution colour to blue side of the visible spectrum (blueshift) with increasing polarity of the solvent. In our case, the solution changes to orange colour from red when solvent is changed. This means that the emission spectrum of the solution underwent blueshift. (As orange colour is on the 'blue' side for red colour.) So this is a hypsochromic shift, and the new solvent is more polar that the previous one, as it caused hypsochromic shift.