合成了一种新型热致变色有机化合物 1,5-双 (羟乙基氨基)-2,4-二硝基苯 (BDB),并使用 X 射线衍射、差示扫描量热法、可见光和红外光谱对其进行了表征。观察到 BDB 在室温下以 A 型和 B 型两种不同的晶体结构存在。在每个晶体结构中,羟基、氨基和硝基之间都存在分子内和分子间氢键。随着温度升高,BDB结晶粉末的颜色由黄色变为橙色。再次冷却时,黄色在特定时间段内恢复,表明固态BDB的热致变色是可逆的。在转变温度下,A 型和 B 型晶体都转变为 C 型晶体。从 X 射线衍射结果来看,
Single benzene fluorophores (SBFs) containing secondary and or tertiary amines and the terephthalonitrile moiety in direct conjugation with each other across a benzene ring, were synthesized and their emissive character were investigated using theoretical and experimental methods. Results show that there is a strong interplay between molecular geometry and the push-pull type charge delocalization in