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. 2018 Dec 18;25(5):1260–1268. doi: 10.1002/chem.201803720

Table 2.

Wavelengths of the MLCT transitions (λ abs/nm) and molar absorptivities (ϵ/m −1 cm−1) of [2]PF6, [3]PF6, [4]PF6, and [5]PF6 in CH3CN, and their redox potentials measured by cyclic voltammetry.[a]

Complex λ abs [nm] (ϵ [m −1 cm−1]) E 1/2 (RuIII/II) [V][a] ΔE p [V][a]
[2]PF6 530 (4300), 389 (6900) −0.03 0.060
[3]PF6 [b] 540 (6200), 392 (9300) 0.00 0.071
[4]PF6 526 (4900), 388 (11400) +0.16 0.00
[5]PF6 [c] 501 (6000), 395 (11700) +0.16 0.090

[a] Measurement conditions: 1 mm complexes in 0.1 m Bu4NPF6/CH3CN, scanning rate 100 mV s−1. The potentials are referenced to Fc+/0. [b] A mixture of two isomers in a ratio of 1:0.8 was used. [c] A mixture of three isomers in a ratio of 0.3:1:0.2 was used.