. Author manuscript; available in PMC: 2019 Nov 28.

Published in final edited form as: J Mater Chem B. 2018 Jul 17;6(44):7247–7256. doi: 10.1039/C8TB01599F

Table 1.

Photophysical properties of MagQ1 and MagQ2^a

Compound	λ_abs (nm)	λ_exc (nm)	λ_em (nm)	Φ^b	K_d Mg²⁺	F_max/F_min
MagQ1^c	600^e	600	635	0.0108(3)
MagQ1 + Mg²⁺^d	602	602	636	0.35(1)	1.50(2) mM	29
MagQ2^c	600	600	634	0.0099(8)
MagQ2 + Mg²⁺^d	601	601	635	0.34(2)	1.51(5) mM	29

Data collected at a probe concentration of 1 μM in aqueous buffer (50 mM PIPES, 100 mM KCl, pH 7.0, 25 °C). Excitation wavelength λ_exc = 600 nm. Number in parenthesis correspond to uncertainty in the last significant figure

Relative quantum yield of fluorescence was determined using a cresyl violet solution in methanol as fluorescence

standard (Φ = 0.66).

Solution treated with 10 μM EDTA to remove adventitious metal.

Solution containing 200 mM Mg²⁺.

Molar absorptivity ε = 84000 ± 1000 M⁻¹⋅cm⁻¹.