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.
参考文献
[1] | He G S;Bhawwalkar J D et al.[J].Applied Physics Letters,1995,67:3703. |
[2] | Bhawalkar JD.;Prasad PN.;He GS. .NONLINEAR MULTIPHOTON PROCESSES IN ORGANIC AND POLYMERIC MATERIALS [Review][J].Reports on Progress in Physics,1996(9):1041-1070. |
[3] | Reinhardt BA.;Clarson SJ.;Dillard AG.;Bhatt JC.;Kannan R. Yuan LX.;He GS.;Prasad PN.;Brott LL. .Highly active two-photon dyes: Design, synthesis, and characterization toward application[J].Chemistry of Materials,1998(7):1863-1874. |
[4] | Spangler C W .[J].Journal of Materials Chemistry,1999,9:2013. |
[5] | Hua J I;Li B;Qian S X et al.[J].Polymer,2004,45:7143-7149. |
[6] | Yoo J;Yang S K;Jeong M Y et al.[J].Organic Letters,2003,5(05):645. |
[7] | Porre L;Mongin O;Katan C .[J].Organic Letters,2004,6(01):48. |
[8] | Hua J L;Lie B;He Tian et al.[J].Polymer,2004,45:7143. |
[9] | Wang XM;Yang P;Li B;Jiang WL;Huang W;Qian SX;Tao XT;Jiang MH .Two-photon absorption of new multibranched chromophore with dibenzothiophene core[J].Chemical Physics Letters,2006(4-6):333-339. |
[10] | Huang Z Z;Wang X M;Li B et al.[J].Optical Materials,2007,29:1084. |
[11] | 王筱梅,杨平,施琴芬,蒋宛莉,程晶磊.四(4,4′,4",4′″-N,N-二乙氨基)四苯乙烯光致发光与分子的构象效应[J].化学学报,2003(10):1646-1652. |
[12] | Wang X M;Zhou Y F;Zhou G Y et al.[J].Bulletin of the Chemical Society of Japan,2002,8:1847. |
[13] | Wang XM.;Zhou GY.;Yu W.;Zhou YT.;Fang QF.;Jiang MH.;Wang D. .Symmetric and asymmetric charge transfer process of two-photon absorbing chromophores: bis-donor substituted stilbenes, and substituted styrylquinolinium and styrylpyridinium derivatives[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2001(6):1600-1605. |
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