New intrinsic fluoroionophores with dual fluorescence: DMABN-Crown4 and DMABN-Crown5
作者:J.-F. Létard、S. Delmond、R. Lapouyade、D. Braun、W. Rettig、M. Kreissler
DOI:10.1002/recl.19951141117
日期:——
Two new intrinsic fluoroionophores, with the electronic structure of 4-(dimethylamino)- benzonitrile (DMABN): 4-(1-aza-4,7,10-trioxaclyclododecyl)benzonitrile (DMABN-Crown4) and 4-(1-aza-4,7,10,13-tetraoxacyclopentadecyl) benzonitrile (DMABN-Crown5) were synthesized and their absorption, fluorescence spectra and quantum yields of fluorescence measured and discussed. Comparison of X-ray data and calculations
具有4-(二甲基氨基)-苄腈(DMABN)电子结构的两个新的固有氟离子载体:4-(1-氮杂-4,7,10-三氧丙烯基十二烷基)苄腈(DMABN-Crown4)和4-(1-氮杂-合成了4,7,10,13-四氧杂环戊基)苄腈(DMABN-Crown5),并对其吸收,荧光光谱和荧光量子产率进行了测量和讨论。X射线数据的比较和密度泛函理论(DFT)的计算表明,从DMABN到DMABN-Crown5,氨基相对于苯基平面的扭曲角增加,而氮的锥体化作用却没有受到显着影响。活化能(E a 8.9 kJ·mol -1,E d 23.7 kJ·mol -1)和焓(ΔH-14.8kJ·mol)在甲苯中获得了-1)涉及DMABN-Crown5的LE和TICT状态的信息,并将其与先前针对DMABN公开的信息进行了比较。在冠状衍生物中形成TICT状态时,应变的更大释放(较大的ΔH)说明室温下记录的TICT排放比例更高