ure ). The designed V(IV) MOFs (with mn33) met the criteria for visible light absorption (Figure ), alignment for HER (Figure ), and mobile charge carriers (hole, in particular, see Figure ). Lastly, MOFs with the Co(III) metal node mn34 displayed adequate alignment to HER (Figure ), band gap in the visible range (Figure ), and lower effective masses for both electron and hole on average than MOFs without this node (Figures and).