New difluorobora-diisoindolomethenes dyes were synthesized from carbohydrazide and o-hydroxy-acetophenone derivatives bearing phenyl, p-anisole or ethylthiophene substituents. The nature of the substituents allows modulating the fluorescence from 650 nm to 780 nm. Replacement of the fluoro ligands by ethynyl-aryl residues is feasible using Grignard reagents. Standard fluorescence studies prove that very efficient energy transfer, from the pyrene moiety linked to the boron center to the boradiazaindacene, is effective in providing large virtual Stokes shifts.
利用带有苯基、对
苯甲醚或乙基
噻吩取代基的羧酰
肼和邻羟基
苯乙酮衍
生物合成了新的二
氟硼二异
吲哚甲基
染料。取代基的性质可以调节 650 纳米到 780 纳米的荧光。使用
格氏试剂可以用
乙炔芳基残基取代
氟配体。标准荧光研究证明,从与
硼中心相连的
芘分子到
硼二氮杂并二苯的高效能量转移能有效地提供较大的虚拟斯托克斯位移。