| Character | Donor® Acceptor | Experimental data l (nm) | Theoretical data l (nm) | |||
| Ligand (Nazpy) | d-RuCl2(Nazpy)2 | Ligand | d-RuCl2(Nazpy)2 | Ligand | d-RuCl2(Nazpy)2 | |
| LLCT | LP(Npy) ® s*(C-C) | LP(N1) ® s*(Npy-C) | 290 | 290 | 293 | |
| LLCT | LP(O) ® p*(C-C) | LP(O) ® p*(C-C) | 400 | 400 | 393 | 371 |
| LLCT | p(C-C) ® p*(C-C) | p(C-C) ® p*(C-C) | 468 | 468 | 596 | 607 |
| MLTC | LP(Ru) ® p*(N1-N2) | 590 | 689 | |||