Plasmon enhanced fluorescence of a bisphthalonitrile-based dye via a dopamine mediated interfacial crosslinking reaction on silver nanoparticles

Plasmon enhanced fluorescence of a bisphthalonitrile-based dye via a dopamine mediated interfacial crosslinking reaction on silver nanoparticles
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通过多巴胺介导的银纳米粒子界面交联反应等离子激元增强双邻苯二甲腈基染料的荧光

DOI:
10.1039/c5ra12242b
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发表时间:
2015-08
期刊:
影响因子:
3.9
通讯作者:
Xiaobo Liu
Xiaobo Liu
中科院分区:
化学3区
文献类型:
--
作者:
Kun Jia;Xuefei Zhou;Lin Pan;Liting Yuan;Pan Wang;Chunhui Wu;Yumin Huang;Xiaobo Liu

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合成了一种含双酞腈基团的酚酞衍生物荧光染料,并通过界面交联反应将其化学接枝到多巴胺修饰的银纳米粒子上,从而增强了染料分子在溶液相中的荧光发射。具体地,非荧光酚酞(PP)分子通过亲核取代被双邻苯二甲腈(BPH)基团封端,以由于分子间旋转的限制而获得紫色/蓝色发射荧光染料PP-BPH。此外,PP-BPH染料可以固定在多巴胺改性的银纳米颗粒的表面上,因为基于双邻苯二甲腈的单体可以在芳族胺或酚化合物(即多巴胺)的存在下容易地交联。因此,PP-BPH染料的荧光发射可以通过银纳米颗粒的等离子体增强效应进一步增强。本论文的初步研究结果将为PP-BPH基多功能聚合物的等离子体激元控制的光子学性质的研究奠定基础。
A fluorescent dye of a phenolphthalein derivative containing bisphthalonitrile groups was synthesized and subsequently chemically grafted onto dopamine modified silver nanoparticles via the interfacial crosslinking reaction, leading to enhanced fluorescent emission of dye molecules in a solution phase. Specifically, the non-fluorescent phenolphthalein (PP) molecule was end-capped with bisphthalonitrile (BPH) groups through nucleophilic substitution to obtain a violet/blue-emitting fluorescent dye PP-BPH due to the restriction of inter-molecular rotation. Furthermore, the PP-BPH dye can be immobilized on the surface of the dopamine modified silver nanoparticles, given the fact that bisphthalonitrile based monomers can be readily crosslinked in the presence of aromatic amine or phenol compounds (i.e. dopamine). Consequently, the fluorescent emission of the PP-BPH dye can be further enhanced via the plasmonic enhancement effects of silver nanoparticles. The preliminary results obtained in this communication will pave the way for the plasmon controlled photonic properties of PP-BPH based multifunctional polymers.
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