Novel triphenylamine based rhodamine derivatives: synthesis, characterization, photophysical properties and viscosity sensitivity
作者:Shantaram Kothavale、Nagaiyan Sekar
DOI:10.1039/c6ra19899f
日期:——
triphenylamine substituted derivatives showed largerStokesshift and emission in the NIR region. All these newly synthesized rhodamine derivatives show comparatively largerStokesshift (44–135 nm) than the commercially available RhodamineB 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.
合成了五种新的基于三苯胺的深红色至近红外发射的若丹明衍生物,并通过1 H和13 C NMR光谱学和元素分析对其进行了表征。所有这些衍生物的光物理性质都以其螺环形式和开放形式进行了研究。与普通罗丹明衍生物相比,发现羟基取代的衍生物显示出红移排放,而三苯胺取代的衍生物在近红外区显示出更大的斯托克斯位移和发射。所有这些新合成的若丹明衍生物都比市售的若丹明B和若丹明101表现出相对更大的斯托克斯位移(44–135 nm)。在开放状态下,它们在白天以及紫外光下会显示出从粉红色(619 nm)到深蓝色(719 nm)的不同发射颜色。我们还研究了染料RH-2的加成酸(甲苯中的TFA)从螺环到开环形式的相互转化。对它们的粘度敏感性进行了研究,发现它们在极性粘性介质(如乙醇-甘油)中以开放形式显示出非常高的荧光增强作用。
US4390616A
申请人:——
公开号:US4390616A
公开(公告)日:1983-06-28
US4436920A
申请人:——
公开号:US4436920A
公开(公告)日:1984-03-13
Red emitting triphenylamine based rhodamine analogous with enhanced Stokes shift and viscosity sensitive emission
作者:Amol G. Jadhav、Shantaram Kothavale、Nagaiyan Sekar
DOI:10.1016/j.dyepig.2016.11.021
日期:2017.3
analogues of RhodamineB and Rhodamine 101 are synthesized by condensing N-substituted amino phenols with keto-acids of N-substituted phenols in presence of trifluoroacetic acid and are characterized by spectroscopic methods. Triphenylamine based derivatives show largeStokesshift (47 nm–69 nm) and red shifted emission (close to Near Infrared region) as compared to parent RhodamineB and Rhodamine 101. These