Table 1.

Photophysical properties of [7]helicene-like compounds and aza[7]helicenes.

	λabs (nm) a	λem (nm) b	ϕ c
1a	401	417, 435 (sh) (265)	<1
1b	395, 415 (sh)	458 (300)	4
2b	389, 411 (sh)	434 (sh), 454 (325)	11
4b	406	422, 441 (sh) (294)	31
5b	401	421, 444 (335)	17
5c	401	422, 445 (335)	16
2a d	412	450 (320)	23
4a e	408	421, 441 (sh) (340)	40
5a f	400	418, 442 (330)	17

^a The longest absorption maximum in CH₂Cl₂. sh: shoulder. ^b Emission maximum in CH₂Cl₂. Excitation wavelength in parenthesis. ^c Absolute quantum yield in CH₂Cl₂. ^d Reference [35]. ^e Reference [36]. ^f Reference [33].