Photophysical data of 1–3.

Complex	Medium (T/K)	Absorption λmax/nm (εmax/dm3 mol−1 cm−1)	Emission λmax/nm (τo/μs)	Φ sol a	Φ film b	k r c/s−1	k nr c/s−1
1	Toluene (298)	326 (16 490), 338 (17 720), 365 (8920), 485 (310)	607 (0.5)	0.040		8.0 × 104	1.9 × 106
	Solid (298)		514 (1.9)
	Solid (77)		523 (3.7, 8.6)f
	Glass (77)d		520, 555 (24.8)
	Thin film (298)e
	5 wt% in mCP		529 (8.1)		0.73	9.0 × 104	3.3 × 104
	10 wt% in mCP		536 (5.8)		0.75	1.2 × 105	5.2 × 104
	15 wt% in mCP		545 (4.1)		0.79	1.9 × 105	5.1 × 104
	20 wt% in mCP		547 (3.5)		0.74	2.1 × 105	7.4 × 104
					0.82g	2.3 × 105	5.1 × 104
2	Toluene (298)	295 (89 355), 341 (29 320), 380 (9800)	624 (0.2)	0.036		1.8 × 105	4.8 × 106
	Solid (298)		568 (0.2)
	Solid (77)		545, 581 (0.7, 3.6)f
	Glass (77)d		482, 518, 555 (3.1, 21.6)f
	Thin film (298)e
	5 wt% in mCP		532 (1.4)		0.74	5.3 × 105	1.9 × 105
	10 wt% in mCP		536 (1.3)		0.64	4.9 × 105	2.8 × 105
	15 wt% in mCP		540 (1.2)		0.61	5.1 × 105	3.3 × 105
	20 wt% in mCP		543 (1.1)		0.59	5.4 × 105	3.7 × 105
					0.68g	6.2 × 105	2.9 × 105
	50 wt% in mCP		560 (1.1)		0.48	4.4 × 105	4.7 × 105
3	Toluene (298)	294 (176 210), 341 (41 395), 373 (9730)	584 (0.5)	0.091		1.8 × 105	1.8 × 106
	Solid (298)		565 (0.4)
	Solid (77)		557 (2.4)
	Glass (77)d		491, 533, 569 (2.8, 15.7)f
	Thin film (298)e
	5 wt% in mCP		503, 525 (0.7, 3.1)		0.58	1.9 × 105	1.4 × 105
	10 wt% in mCP		503, 525 (0.4, 2.4)		0.54	2.3 × 105	1.9 × 105
	15 wt% in mCP		525 (1.6)		0.55	3.4 × 105	2.8 × 105
	20 wt% in mCP		525 (1.6)		0.58	3.6 × 105	2.6 × 105
					0.75g	4.7 × 105	1.6 × 105
	50 wt% in mCP		535 (1.4)		0.37	2.6 × 105	4.5 × 105
	75 wt% in mCP		552 (0.9)		0.28	3.1 × 105	8.0 × 105
	100 wt% in mCP		567 (0.5)		0.11	2.2 × 105	1.8 × 106

^aThe relative luminescence quantum yields were measured at room temperature using quinine sulfate in 0.5 M H₂SO₄ as the reference (excitation wavelength = 365 nm, Φ_lum = 0.546).

^b Φ _film of gold(iii) compound doped into mCP excited at a wavelength of 310 nm.

^cRadiative decay rate constant determined from the equation k_r = Φ_em/τ; non-radiative decay rate constant determined from the equation k_nr = (1 − Φ_em)/τ.

^dMeasured in EtOH–MeOH–CH₂Cl₂ (40 : 10 : 1, v/v).

^ePrepared by spin-coating.

^fBi-exponential decay.

^gMeasured under inert atmosphere.