Table 1.

The parameter of the energy fluctuation correlation function (Eq. 2) obtained from global fits and vibrational relaxation time T₁ obtained from the transient grating signal (i.e., τ = 0)

Species	Δ0/ps−1	Δ1/ps−1	τ1/ps	Δ2/ps−1	τ2/ps	T1/ps
CA–N3−	—	0.95	17	1.6	0.2	2.8
Hb–N3−	0.56	—	—	1.2	0.3	2.5
Hb–Co	0.35	0.41	12	0.71	0.5	25