Amino-anthraquinone chromophores functionalised with 3-picolyl units: structures, luminescence, DFT and their coordination chemistry with cationic Re(i) di-imine complexes
作者:Jennifer E. Jones、Benson M. Kariuki、Benjamin D. Ward、Simon J. A. Pope
DOI:10.1039/c0dt01383h
日期:——
the LUMO energy. The coordination chemistry of the ligands was probed through reaction with fac-[Re(CO)3(di-imine)(MeCN)](BF4) where di-imine = 1,10-phenanthroline (phen) and 2,9-dimethyl-1,10-phenanthroline (dmp). Combined structural and spectroscopic studies confirmed that the ligands coordinate to Re(I) exclusively via the pyridyl units, however in the case of L3 only monometallic complexes were
基于3-picolyl官能化的四个新配体的合成 氨基蒽醌(AQ)发色团通过一锅还原胺化程序进行描述,给出所需的配体L1-L4(L1,1-(3-吡啶甲基氨基)蒽-9,10-二酮; L2,1-羟基-4-(3-吡啶甲基氨基)蒽-9,10-二酮; L3,1,4-双(3-吡啶甲基氨基)蒽-9,10-二酮; L4,1,5-双(3-吡啶甲基氨基)蒽-9,10-二酮)。通过1 H和13 C 1 H} NMR在溶液中表征每种配体,其中三个实例给出了单晶X射线衍射数据。该结构证实了所提出的配方,并且还揭示了在醌和仲胺单元之间存在分子内H键。使用组合的实验/理论方法研究了配体的电子特性,结果表明,在每种情况下,可见光区域的吸收均构成了源自N的显着电荷转移(CT)特性。-(胺)-醌过渡,并且对溶剂敏感。密度泛函理论(DFT)的计算还表明,在AQ核心处氨基取代的位置会通过调制HOMO而不是LUMO能量来影响最低能量特征的波长。通过与fac-