Table 7.

The optical properties of the synthesized pyrimido[1,2-b]indazolederivatives 4(a–p).

Entry	Λmax (abs, nm)	Λmax (em, nm)	Stokes Shift (nm)	OD	I	ΦF
Tryptophan [32]	280	355	75	0.384	158,517	0.130
4a	306	533	227	0.774	46,182	0.019
4b	306	530	224	0.957	90,759	0.031
4c	308	553	245	1.064	31,279	0.010
	270 (Sh)	553	283	0.838	31,279	0.012
4d	310	524	214	1.505	115,328	0.025
4e	300	518	218	0.870	165,016	0.062
	344 (Sh)	518	174	0.788	165,016	0.068
4h	310	524	214	1.505	115,328	0.025
4i	306	534	228	1.883	73,195	0.013
	270	534	264	1.251	73,195	0.019
4j	300	534	234	1.140	61,312	0.017
4k	314	532	218	1.950	83,407	0.014
4l	320	540	220	2.070	65,088	0.010
4m	308	535	227	1.794	70,535	0.013
4n	272	530	258	0.449	54,760	0.040
	322 (Sh)	530	208	0.439	54,760	0.041
4o	270	543	273	1.761	29,458	0.005
4p	306	499	193	1.176	59,599	0.016
	268 (Sh)	499	231	0.827	59,599	0.023

Sh = shoulder; abs = absorbance; em = emission; OD = excited absorbance; I = integral area; Φ_F = Fluorescence quantum yield.