The impact of the heteroatom in a five-membered ring on the photophysical properties of difluoroborates
作者:Anna M. Grabarz、Beata Jędrzejewska、Agnieszka Skotnicka、N. Arul Murugan、Filip Patalas、Wojciech Bartkowiak、Denis Jacquemin、Borys Ośmiałowski
DOI:10.1016/j.dyepig.2019.04.026
日期:2019.11
optical spectra substantially differ in both sets of dyes. In particular, the dimethylamino series are more strongly affected by heteroatom substitution, i.e., the insertion of X = O or X = S in lieu of X = NMe causes substantial bathochromic shifts of the absorption and emission bands, as well as marked changes in their topologies. In contrast, the optical spectra of the unsubstituted compounds undergo
BF 2系列小说合成并表征了带有五元杂环(X = NMe,O和S)的配合物,并着重研究了原子交换对未取代和二甲基氨基衍生物的光物理性质的影响。实验结果表明,两组染料的光谱基本不同。特别是,二甲基氨基系列受杂原子取代的影响更大,即,插入X = O或X = S代替X = NMe会引起吸收和发射带的显着红移,以及它们的显着变化拓扑。相反,未取代的化合物的光谱仅经历相对较小的红移,并且未观察到能带形状的变化。而且,测得的X = NMe和X = O的未取代化合物的吸收光谱几乎相同。有趣的是,二甲基氨基衍生物的荧光产率比相应的未取代化合物的荧光产率大得多(高达一个数量级)。实验分析得到最先进的量子化学计算的支持,该计算令人满意地再现了实验趋势,并为观察到的光学特征提供了进一步的见解。