Table 1.

Photophysical parameters of the proton-transfer fluorescence band of HPIP in different media and temperatures

Solvent	T, °C	λem, nm ±2	<r>, ±0.003	α1, ±0.05	τ1, ns ±0.3	α2, ±0.05	τ2, ns ±0.2	<τ>/ns	φ, ±0.007
Cyclohexane
	10			1	2.0*			1.8	0.081
	15			1	1.9*			1.7	0.076
	20	590	0	1	1.8			1.6	0.071
	30			1	1.7*			1.5	0.067
DMPC
	15	560	0.243	0.64	1.1	0.36	4.0	3.0
	18	563	0.235	0.65	1.2	0.35	3.6	2.7
	29	587	0.158	0.70	0.8	0.30	1.4	1.0
	39	590		0.82	0.6	0.18	1.1	0.7
PMMA
	20	535	0.335

λ_em, <r>, α_i, τ_i, and φ are the wavelength of the emission maximum, the steady-state anisotropy, the preexponential factors, the fluorescence lifetimes, and the fluorescence quantum yield, respectively. <τ> = (τ₁² + τ₁²)/(τ₁ + τ₂). 

^*Estimated from the quantum yield.