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The Φf of DMCS-TPA in THFwas estimated to be 5.3% using 9,10-diphenylanthracene (DPA) in ethanol (Φf= 95%) as the standard.While the DMCS-TPA powder shows bright yellowish green fluorescence with a Φf of 48.59% (Table 1), indicating its efficient emission in the solid state. The phenomenon demonstrates the AIE nature of DMCS-TPA, which could be attributed to the restricted internal rota-tions and decreased solvent polarity effect when molecules precipitate. The comparatively larger Φf value of DMCS-TPA powder than that of BMBCP (42.35%) implies that the cruciform structure of DMCS-TPA effectively depresses strong Π–Π inter-actions between the DCS axis thus diminishing emission quenching.
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糖太甜521: 金币+5, 翻译EPI+1, ★★★★★最佳答案 2014-10-15 11:17:02
用溶于乙醇中的9,10 - 二苯基蒽(DPA)(φF= 95%)为标准,估算了在THF中DMCS-TPA的φF值为5.3%。而DMCS-TPA粉末显示明亮的黄绿色荧光,其φF为48.59%(表1),表明在固体状态下其发光的有效性。这一现象表明DMCS-TPA的AIE性质,可能归因于当分子沉淀时受约束的内部旋转和降低溶剂极性的效应。DMCS-TPA粉比BMBCP(42.35%)具有相对较大的φF值提示,DMCS-TPA的十字形结构可有效地抑制DCS轴间从有力的π-π相互作用,进而降低发光的淬火作用。
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