作者:Eric S. Sales、Juliana M. F. M. Schneider、Marcos J. L. Santos、Adailton J. Bortoluzzi、Daniel R. Cardoso、Willy G. Santos、Aloir A. Merlo
DOI:10.5935/0103-5053.20150011
日期:——
bands at 280 and 350 nm related to π,π* and n,π* transitions. No changes were observed to lower-energy absorption band (e < 104 mol L-1 cm-1) related to n,π* transition. A laser flash photolysis study for one of the quinolines relates a main transient band at 450 nm with a lifetime of 2.6 µs in ethanol, which is completely quenched in the presence of oxygen. This transient band was assigned to triplet-triplet
由三组分描述了五种喹啉8-辛氧基-4- [4-(辛氧基氧基)苯基]喹啉和6-烷氧基-2-(4-烷氧基苯基)-4-[(4-辛氧基氧基)芳基]喹啉的合成。路易斯酸FeCl3和Yb(OTf)3介导的偶联反应。4-n-辛基氧基苯甲醛,茴香醛,4-n-辛基氧基苯胺对茴香胺和1-乙炔基-4-庚基氧基苯,1-乙炔基-4-辛基苯氧基和2-乙炔基-6-庚基氧基萘是该方案中的试剂。Yb3 +催化剂比Fe3 +产生更高的喹啉收率。偏光光学显微镜(POM)显示,喹啉都不是液晶,甚至各向异性更强。极性溶剂中喹啉之一的UV-Vis测量显示,在280和350 nm处有两个吸收带,与π,π*和n,π*跃迁有关。观察到较低的能量吸收带没有变化(e < 104 mol L-1 cm-1)与n,π*跃迁有关。对一种喹啉的激光闪光光解研究涉及在乙醇中寿命为2.6 µs的450 nm主瞬变带,该瞬变带在氧气存在下被完全淬灭。将该瞬