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首页> 外文期刊>RSC Advances >Novel triphenylamine based rhodamine derivatives: synthesis, characterization, photophysical properties and viscosity sensitivity
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Novel triphenylamine based rhodamine derivatives: synthesis, characterization, photophysical properties and viscosity sensitivity

机译：基于新型三苯胺的罗丹明衍生物：合成，表征，光药性和粘度敏感性

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Five novel triphenylamine based deep red to NIR emitting rhodamine derivatives were synthesized and characterized by ~(1) H and ~(13) C NMR spectroscopy and elemental analysis. The photophysical properties of all these derivatives were studied in their spirocyclic as well as open form. Hydroxyl substituted derivatives were found to show red shifted emissions as compared to the plain rhodamine derivatives, while triphenylamine substituted derivatives showed larger Stokes shift and emission in the NIR region. All these newly synthesized rhodamine derivatives show comparatively larger Stokes shift (44–135 nm) than the commercially available Rhodamine B and Rhodamine 101 . In their open form they are found to exhibit different emission color from pink (619 nm) to dark blue (719 nm) in day as well as UV-light. We also studied the interconversion of dye RH-2 from its spirocyclic to open form with the addition of acid (TFA in toluene). They are studied for their viscosity sensitivity and found to show very high fluorescence enhancement in polar viscous media such as ethanol–glycerol in their open form.
机译：基于三种新的三苯胺基于罗丹明衍生物的深红色被合成，其特征在于〜（1）H和〜（13）C NMR光谱和元素分析。在它们的螺旋环中以及开放形式中研究了所有这些衍生物的光物理性质。发现与普通罗丹明衍生物相比，发现羟基取代的衍生物显示红色偏移排放，而三苯胺取代的衍生物在NIR区域显示出较大的斯托克斯速度和发射。所有这些新合成的罗丹明衍生物显示比市售的罗丹明B和罗丹明101相对较大的斯托克斯偏移（44-135nm）。在他们的开放形式中，他们被发现将不同的发光颜色从粉红色（619nm）与白天以及紫外线以及紫外线相同。我们还通过加入酸（TFA在甲苯中，研究了染料Rh-2的互连以打开形式。研究了它们的粘度敏感性，并发现在其开放形式的乙醇 - 甘油如乙醇 - 甘油中呈现非常高的荧光增强。

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