Figure 3.

¹H NMR assignments of 1 mm Λ,Λ-B in 20 mm phosphate, pH 6.5, 100 mm NaCl water solution. Resonance assignments refer to positional symbols defined in the chemical structure of Λ,Λ-B with positional symbols at the carbon atoms at the top. Initial numbers (with or without primes) indicate the position within the rings, which are identified by capital letters. “A” and “B” are the axial and equatorial (with respect to the dppz plane) pyridine rings of the bipyridine ligands, respectively; “C” denotes the pyridine and “D” denotes the benzene rings of the dppz ligand. Primed and non-primed numbers discriminate the two bipyridine systems attached to the ruthenium atoms. Lower case letters define the two equivalent monomer units.