“…In the higher energy region, there are four sets of transitions that occur in overlapping sections; π–π * from the quinoline ligand (40,500–36,000 cm −1 , ε= 20,000–30,000 M −1 cm −1 ) [42–44], pσ(imine)→ d x 2 –y 2 (Cu(II)) LMCT (45,000–37,000 cm −1 , ε = 3000–4500 M −1 cm −1 ) [34,45,46], pσ(Cl)→ d x 2 –y 2 (Cu(II)) LMCT (37,000–29,000 cm −1 , ε = 3000–6000 M −1 cm −1 ) [38–41], and pπ(imine)→ d x 2 –y 2 (Cu(II)) LMCT (40,000–30,000 cm −1 , ε = 1000– 3000 M −1 cm −1 ) [34,45,47]. The broad absorption bands at 31,646 cm −1 (ε = 14,273 M −1 cm −1 ) ( QuiBD ) and 33,223 cm −1 (ε = 21,066 M −1 cm −1 ) ( QuiED ) correspond to the expected pσ(Cl)→ d x 2 –y 2 (Cu(II)) and pπ(imine)→ d x 2 –y 2 (Cu(II)) LMCT transitions superimposed upon the tail end of the intense quinoline π– π* and p r (imine)→ d x 2 –y 2 (Cu(II)) LMCT features that lie to higher energy (Fig.…”