. 2022 Mar 11;61(12):5157–5171. doi: 10.1021/acs.inorgchem.2c00501

Table 2. Spectroscopic Properties of [Ln(CHXOCTAPA)]⁻ and [Ln(OCTAPA)]⁻ Complexes Measured in Aqueous Solutions (pH 7.1)^c.

	[Eu(CHXOCTAPA)]⁻	[Eu(OCTAPA)]⁻	[Tb(CHXOCTAPA)]⁻	[Tb(OCTAPA)]⁻
λmax/nm	272	272	271	272
ε/M^–1 cm^–1	7.66 × 10³	7.50 × 10³	8.34 × 10³	9.36 × 10³
τ_H2O/ms^a	0.598	0.584	1.527	1.473
τ_D2O/ms^a	2.363	2.292	2.822	2.863
Φ_H2O/%^b	3.4	4.5	11	12
Q	1.0	1.1	1.3	1.2
τ_Rad/ms	6.57	6.07
Φ_Eu/%	9.60	9.10
η_sens	0.37	0.47

λ_exc = 279 nm, estimated error ± 5%; q_Eu = 1.11(Δk_obs – 0.31), ref (51); q_Tb = 5.0(Δk_obs – 0.06), ref (52), with (Δk_obs = 1/τ_H2O – 1/τ_D2O).

Determined using the trispicolinate complexes are standard, refs (53) and (54), λ_exc = 279 nm, estimated error ± 15%.

Determined according to ref (55).

Table 2. Spectroscopic Properties of [Ln(CHXOCTAPA)]− and [Ln(OCTAPA)]− Complexes Measured in Aqueous Solutions (pH 7.1)c.