Table 2. Electrochemical and quenching properties of R(X) measured in DMF or DMA at 25 °C.

	Solv.	E red 1/2 a /V (ne–) b	c /eV	K SV d /M–1	k q e /106 M–1 s–1	η q f
R(4)	DMF	–1.73 (2)	0.76 g	4.5	2.9	0.85
		–1.80 (1)
R(5)	DMF	–1.82	0.75	11.4	4.9	0.93
	DMA	–1.74	0.85	17.5	8.6	0.96
R(4·5)	DMF	–1.91	0.74	5.2	1.5	0.87
R(OMe)	DMF	–1.89	0.63	26.0	3.4	0.97
R(5)-e h	DMF	–1.83 (2)	0.67 g	3.5	0.7	0.81
		–1.91 (1)

^aFirst reduction potential vs. Ag/AgNO₃, determined from the DPV peaks.

^b n = 3 except for R(4) and R(5)-e.

^c .

^dStern–Volmer constants obtained from quenching experiments of emission by TEOA.

^e k _q = K _SV/τ _em.

^f[TEOA] = 1.256 M.

^gBased on the first E _red.

^hFrom ref. 16.