. 2021 Oct 25;6(44):29483–29494. doi: 10.1021/acsomega.1c03469

Table 6. Absorption and Emission Maxima of Selected Coumarins 2 and 4.

entry	compd	λ_abs^a (nm)	λ_em^b (nm)	ΔStoke^c (nm)
1	2a	375	435	60
2	2d	377	441	64
3	2e	376	446	70
4	4a	301	453	152
5	4b	302	452	150
6	4c	300	480	180
7	4d	300	455	155

The maximum absorption wavelength in acetonitrile (2.3 mM).

Excited at the maximum absorption wavelength in acetonitrile (2.3 mM).

Stoke shift = λ_em – λ_abs.

entry	compd	λ_abs^a (nm)	λ_em^b (nm)	ΔStoke^c (nm)
1	2a	375	435	60
2	2d	377	441	64
3	2e	376	446	70
4	4a	301	453	152
5	4b	302	452	150
6	4c	300	480	180
7	4d	300	455	155

entry	compd	λ_abs^a (nm)	λ_em^b (nm)	ΔStoke^c (nm)
1	2a	375	435	60
2	2d	377	441	64
3	2e	376	446	70
4	4a	301	453	152
5	4b	302	452	150
6	4c	300	480	180
7	4d	300	455	155

entry	compd	λ_abs^a (nm)	λ_em^b (nm)	ΔStoke^c (nm)
1	2a	375	435	60
2	2d	377	441	64
3	2e	376	446	70
4	4a	301	453	152
5	4b	302	452	150
6	4c	300	480	180
7	4d	300	455	155