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合成了新的发光分子-4-N,N-二苯基氛基苯甲酸琉角酸亚胺(简称TBA-SCM ),利用其琉拍跳亚胺基与PAMAM所含的氛基之间高度反应活性,将三苯胺甲统基组装键合在树枝分子PAMAM (0~3G)表面,构筑新的树枝分子TBA-PAMAM.研究表明,在稀溶液(10-6)下未观测到TBA-PAMAM的荧光增强现象;当浓度增大至10-4时,按1:1的配比组装数秒后即可检测到显著的荧光增强.光谱测试证实,这是由于该浓度下PAMAM聚集态的发光带与TBA-SCM发光带发生部分重叠促进两者之间有效的电荷转移所致.荧光衰减曲线拟合结果表明,TBA-PAMAM(OG,3G)有两个寿命,长寿命对应着PAM-AM(0~3G),寿命则是TBA-PAMAM(OG,3G)树枝状结构.随着TBA-SCM的增大,TBA-PAMAM(OG,3G)的单光子荧光急剧降低直至完全淬灭,但双光子荧光强度则显著增高.

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