Compound

λ (nm)

(ΔA/A0) (%);

Δλ (nm)

Kb (M−1)

Ligand L

350

68.96 (Hyper);

+3

1.42 × 105

Compound 1

350

76.00 (Hyper);

+3

1.34 × 105

Compound 2

350

48.70 (Hyper);

+2

1.19 × 105

Compound 3

300

50.00 (Hyper);

−3

1.02 × 105

Compound 4

350

16.53 (Hyper);

+5

1.12 × 105