Synthesis of 2-(1-Benzofuran-2-yl)-4-(1,3-benzoxazol-2-yl/ 1,3-benzothiazol-2-yl) Quinolines as Blue Green Fluorescent Probes

Table 1

Photoluminescence properties of compound (3a-b) and (4a–d).

Compound	Solvent	Absorption 𝜆max nm	Emission 𝜆max nm	Molar absorpivity Mol^−1 cm^−1	Stokes shift nm	Quantum yield Φ𝐹
3a	THF	418.0	451.6	223.6 × 10^4	33.6	0.183
	DMSO	423.2	483.8	153.9 × 10^4	60.6	0.165
3b	THF	430.4	462.8	305.8 × 10^4	32.4	0.186
	DMSO	430.4	491.8	197.3 × 10^4	61.4	0.181
4a	Chloroform	441.6	490.4	164.7 × 10^4	48.8	0.247
	THF	446.0	518.2	201.0 × 10^4	72	0.243
	DMSO	446.4	522.4	127.9 × 10^4	76	0.228
4b	Chloroform	432.0	485.8	228.4 × 10^4	53.8	0.184
	THF	432.2	470.2	216.4 × 10^4	38	0.167
	DMSO	442.0	512.0	713.2 × 10^4	70	0.132
4c	Chloroform	427.0	465.4	79.4 × 10^4	38.4	0.206
	THF	426.8	468.2	62.5 × 10^4	41.4	0.205
	DMSO	430.0	499.2	181.4 × 10^4	69.2	0.198
4d	Chloroform	427.0	468.2	76.1 × 10^4	41.2	0.143
	THF	426.8	478.0	97.1 × 10^4	51.2	0.136
	DMSO	423.6	510.6	69.2 × 10^4	87	0.134