Table 3. z-Components of the A Tensors (A_zz) for the Complexes with CB[7] (A_zz^cb), Free Spin Probes in the 50/50 v/v Glycerol–Water Mixture (A_zz) and in Toluene (A_zz^T).

spin probes	complex with CB[7] in the CB[7] matrix	glycerol/50/50 v/v	water	toluene	psolid
I	35.03 ± 0.05	35.8 ± 0.05		34.5 ± 0.05	0.41 ± 0.10
II	36.45 ± 0.05	36.67 ± 0.05	37.01 ± 0.1a	36.17 ± 0.05	0.33 ± 0.10
III	35.3 ± 0.05	36.7 ± 0.05		35.25 ± 0.05	0.03 ± 0.10

^aDetermined from the distances between the outer extrema of the ESR spectra at 77 K, and the environment polarity parameters of spin probes (p_solid) in the CB[7] complexes in the solid CB[7] matrix. The A_zz values were determined by extrapolation of the linear dependencies, A_zz vs a_N, for the glycerol/water solutions to the pure water.