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Uniform composition film of hydrophilic colloidal gold nanoparticles and hydrophobic carbazole functionalized fluorene trimers for enhanced fluorescence and stability
  • 分类:O614.33[理学—无机化学;理学—化学] TB383[一般工业技术—材料科学与工程]
  • 作者机构:[1]State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640, China, [2]State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, China
  • 相关基金:supported by the National Natural Science Foundation of China(20834006,50873043,91233113);the National Basic Research Program of China(2009CB623605,2013CB834705);Guangdong Natural Science Foundation(S2012030006232);Introduced Innovative R&D Team of Guangdong(201101C0105067115)
中文摘要:

进结合的分子的 Compositing 金 nanoparticles 被开发了是最重要的途径之一增加稳定性,自从结合的材料的降级现在是在工业化申请前要征服的最大的瓶颈之一。有强壮的表面血浆回声的大尺寸的胶体的金 nanoparticles 被设计到与结合的分子合成,以便认识到有效荧光改进和稳定。吸水的胶体的金 nanoparticles (30 nm 的粒子直径) 和恐水病的 carbazole functionalized fluorene trimers 的一致作文电影被直接混合获得了他们的水并且 THF 答案,它被 AFM 决定。由作文的比较基于有类似的结构的 fluorene trimers ,我们处于不兼容的溶解度的平衡发现了那个外部 carbazole 组和 fluorene trimers 玩的分子的尺寸一个重要角色,它被认为是在混合溶剂增加 fluorene trimers 的溶解度,连接 AuNP 和外部 carbazole 组,并且制止金 nanoparticle 的总数。这允许灵巧的吸水的金 nanoparticle 在恐水病的结合的主人一致地分散。我们的调查证明作文电影的那荧光紧张被 4 褶层提高,并且加热处理(200 湷愠摮椠獴挠祲瑳污楬敮猠牴 ' 壮肭妹擢撧鳜彔皹 I 敮 ? 牦浯堠爭祡搠晩牦捡楴湯搠瑡吗?

英文摘要:

Compositing gold nanoparticles into conjugated molecules have been developed to be one of the most important approaches to increase stability, since degradation of conjugated materials is now one of the biggest bottle-necks to be conquered before indus- trialization application. Big-size colloidal gold nanoparticles with strong surface plasma resonance are designed to composite with conjugated molecules, in order to realize effective fluorescence enhancement and stabilization. The uniform composition film of hydrophilic colloidal gold nanoparticles (particle diameter of 30 nm) and hydrophobic carbazole functionalized fluorene t_rimers has been obtained by direct mixing of their aqueous and THF solutions, which is determined by AFM. By the comparison of composition based on fluorene trimers with similar structures, we have found that peripheral carbazole group and molecular size of fluorene trimers play an important role in the balance of incompatible solubility, which is regarded as increasing solubility of fluorene trimers in mixed solvent, connecting AuNP and peripheral carbazole groups, and restraining aggregate of gold nanoparticle. This allows facile hydrophilic gold nanoparticle to disperse uniformly in hydrophobic n-conjugated host. Our investigations show that fluorescence intensity of composition film is enhanced by 4 folds, and heat treatment (200℃ for 4 h) for the composition film does not induce the degradation of conjugated backbone without the appearance of low-energy emission band, demonstrating the promi- nent potency of gold nanoparticles in enhanced fluorescence and stability of conjugated molecules and polymers.

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