Synthesis, Electronic, and Electro-Optical Properties of Emissive Solvatochromic Phenothiazinyl Merocyanine Dyes
作者:Martina Hauck、Matthias Stolte、Jan Schönhaber、Hans-Georg Kuball、Thomas J. J. Müller
DOI:10.1002/chem.201100592
日期:2011.8.29
patterns on the peripheral benzene ring were synthesized in good yields by Knoevenagel condensation of the corresponding phenothiazinyl aldehydes and N‐methylrhodanine or indan‐1,3‐dione. The electronic properties were investigated by cyclic voltammetry, absorption, electro‐optical absorption, and emission spectroscopy. All these merocyanines reveal reversible redox behavior that stems from the phenothiazinyl‐centered
通过Knoevenagel缩合相应的吩噻嗪基醛与N-甲基罗丹宁或茚满-1,3-二酮,可以高收率合成在外围苯环上具有可变取代图形的吩噻嗪基部花青染料。通过循环伏安法,吸收法,电光吸收法和发射光谱法研究了电子性质。所有这些花青素都显示出可逆的氧化还原行为,该行为是由吩噻嗪基为中心的氧化产生稳定的自由基阳离子。的氧化还原电位与哈米特强烈相关σ p参数。所有花青素都显示出较大的斯托克斯位移。它们还显示出明显的发射溶剂变色现象,这是由从基态激发到激发态时大的偶极矩变化引起的。这些发现得到溶剂变色研究和与时间有关的DFT计算的支持。