. Author manuscript; available in PMC: 2014 Nov 20.

Published in final edited form as: J Am Chem Soc. 2013 Aug 27;135(36):13558–13566. doi: 10.1021/ja406731f

Table 2.

Photophysical and ECL properties recorded for BB2 – BB4 in CH₂Cl₂.

	Absorbance		Emission			Electrogenerated Chemiluminescence
	λ_abs	ε (M⁻¹cm⁻¹)	λ_FI	Φ_FI	^aE_0-0	λ_ECL	^cΦ _ECL
^bBB2	528 nm	8.4 × 10⁴	547 nm	0.39	2.26 eV	554 nm	——
BB3	528 nm	8.2 × 10⁴	545 nm	0.39	2.27 eV	570 nm, 740 nm	0.006
BB4	528 nm	6.7 × 10⁴	543 nm	0.47	2.28 eV	571 nm, 741 nm	0.010

E_0–0 approximate energy of the first singlet excited state taken as the fluorescence wavelength maximum.

Data for BB2 is reproduced from reference 46.

ECL efficiencies were determined using [Ru(bpy)₃]²⁺ in MeCN as a standard, for which Φ_ECL = 0.05.