Solid-state Structures of N-Substituted Michler’s Ketones and Their Relation to Solvatochromism
作者:Stefan Spange、Mohamed El-Sayed、Hardy Müller、Gerd Rheinwald、Heinrich Lang、Wolfgang Poppitz
DOI:10.1002/1099-0690(200212)2002:24<4159::aid-ejoc4159>3.0.co;2-h
日期:2002.12
found to be mainly the dipolarity/polarizability (π*) and hydrogen bond acidity (α) of the solvent that contribute to the bathochromic UV/Vis band shift. As strongly basic sites are present as substituents at the peripheries of the molecules, protonation takes place at the secondary nitrogen atom of, for example, MK(pipaz)2 (2d) in strongly hydrogen bond-donating (HBD) solvents. This specific type of substitution
N-取代的米氏酮的溶剂化变色 (νmax) - 包括 4'-[双(2-乙酰氧基乙基)氨基]-4-(二甲氨基)二苯甲酮 [MK(OAc)2, 1a], 4,4'-双(二乙氨基) )二苯甲酮 [MK(NEt2)2, 1e], 4,4'-双(4-乙氧基羰基哌嗪基)二苯甲酮 [MK(pipOEt)2, 2a], 4,4'-双(哌啶基)二苯甲酮 [MK(pip)2 , 2b], 4,4'-双(吗啉)二苯甲酮 [MK(mor)2, 2c], 4,4'-双(哌嗪基)二苯甲酮 [MK(pipaz)2, 2d], 4,4'-bis [4-(2-羟乙基)哌嗪基]二苯甲酮 [MK(pipazOH)2, 2e] 和 1,4-双(4-苯甲酰基苯基)哌嗪 (BBP, 3) - 已在 298 K 下在各种溶剂中进行了广泛研究偶极和氢键能力。根据 Kamlet-Taft 线性溶剂化能 (LSE) 关系分析了溶剂化变色特性