Table 2.

Excitation (λ_EX) and emission maxima (λ_EM) of InQ₃ and GaQ₃ complexes and fluorescence lifetime (τ_i) and amplitude (α_i) values alone and in the presence of HSA in various concentrations at pH = 7.40. {c_complex = 10 μM; c_HSA = 2–10 μM; T = 25.0 °C; in 10 mM HEPES, 25 mM NaHCO₃, 100 mM NaCl buffer}^a

	InQ3b	GaQ3
λEX max (nm)	254, 370	367c
λEM max (nm)	540	532 c
Fluorescence lifetime parameters of the complexes alone
τ1 (ns)	0.80 ± 0.03	0.54 ± 0.04
τ2 (ns)	1.41 ± 0.07	1.23 ± 0.03
α1 (%)	75 ± 4	57 ± 5
α2 (%)	25 ± 4	43 ± 5
Two additional lifetime components in the presence of HSA
τ3 (ns)	5.7 ± 0.3	5.0 ± 0.3
τ4 (ns)	13.8 ± 0.6	14.0 ± 0.2

^aValues are the average of at least three measurements. ^bData for InD₃: λ_{EX max} = 295 nm, λ_{EX max} = 354 nm. ^cData taken form Refs. [22, 29]