Photophysical data for BF₂ formazanate 1 and dye-labelled peptides 5 and 7. All measurements were performed in DMSO^a.

Compound	λ abs (nm)	ε (M−1 cm−1)	λ em (nm)	ν ST (nm)	Φ F (%)
1	546	34 500	665	119	4
5	560	32 200	688	128	21
7	555	31 900	690	135	12

^aQuantum yields were determined according to a published protocol³³ using [Ru(bpy)₃][PF₆]₂ as a relative standard.³⁴