Table 1.

Luminescence lifetimes of the EuL* (5 mM) and TbL (1 mM) in H₂O and D₂O with and without Zn²⁺, and the calculated q values.

	LnL only			LnL + Zn2+ (2 equiv)
	τ ${}_{\mathrm{H}{}_2\mathrm{O}}$  [ms]	τ ${}_{\mathrm{D}{}_2\mathrm{O}}$  [ms]	q	τ ${}_{\mathrm{H}{}_2\mathrm{O}}$  [ms]	τ ${}_{\mathrm{D}{}_2\mathrm{O}}$  [ms]	q	Δq
EuL*	0.89	1.25	0.1	0.42	1.02	1.4	1.3
TbL	1.91	1.96	0.0	1.30	2.37	1.5	1.5