Table 1. Photophysical data of the free guests (1 and 2) and their complexes with host molecules in a buffer solution (pH 4.7).

	λ abs (nm)	λ em (nm)	Lifetime (ns)	Quantum yield	Enhancement factor	K a (M−1)
1	257 max, 309 sh, 381 sh	575	22	0.014 ± 0.002	—	—
Q[8]·1	—	552	279	—	6 times
Q[10]·1	260 max, 312 sh, 388 sh	540	499	0.142 ± 0.016	40 times	1.02 × 106
			93
2	254 max, 324 sh, 381 sh	578	13	0.023 ± 0.004	—	—
Q[8]·2	—	557	27	—	2 times	—
Q[10]·2	261 max, 325 sh, 388 sh	553	309	0.060 ± 0.002	20 times	2.31 × 105
			98