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Table 3 Absorption (λA), fluorescence (λF) maxima (nm) and quantum yield φf (%) of the prepared compounds

From: Microwave assisted synthesis of some new thiazolopyrimidine and pyrimidothiazolopyrimidopyrimidine derivatives with potential antimicrobial activity

Compound λA λF ε, I/Mcm × 104 σa (10−16) cm2 Quantum yield (%) φf
1a 321 2.8 1.07
1b 317 2.9 1.11
1c 299 3.1 1.19
1d 309 2.9 1.11
3a 320 372 3.2 1.23 0.68
3b 325 3.3 1.27
3c 315 3.1 1.19
3d 325 3.0 1.15
5a 326 3.4 1.3 0.63
5b 295 5.8 2.23
6a 320 360 2.3 1.07
6b 325 6.2 2.38
9a 315 5.5 2.11
9b 322 6.5 2.5
10 326 537 7.8 3 0.73