The Effect of Methylene Spacers on the Spectral, Electrochemical, Structural, and Photophysical Properties and Electron Injection Dynamics of Bis(4,4'-disubstituted-2,2'- bipyridyl) Ruthenium(II) Dye Analogues and The Effect of Alkali Metal Ions on the Structure and Spectroscopy of a Tripodal Co(II) Complex