基于近红外手性高分子材料设计与偏振发光性能研究

项目名称： 基于近红外手性高分子材料设计与偏振发光性能研究

项目编号： No.21474048

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无机化学

项目作者： 成义祥

作者单位： 南京大学

项目金额： 88万元

中文摘要： 以手性高分子和手性高分子配合物的近红外偏振发光性质为研究导向，选择BODIPY、aza-BODIPY、联萘酚、氮代β-二酮、salen-Zn(II)、salen-(BF2)2配合物等为手性单元或荧光团，以苯并噻二唑、噻吩、咔唑、吩噻嗪、Ru(II)/Pt(II)金属配合物等给电子或吸电子基团为共轭分子桥单元，通过Pd催化偶联反应，合成结构规整、高级有序的D-π-A/D-A型的手性高分子和高分子配合物。通过对手性单元微环境的修饰，产生空间效应和电子诱导效应，手性特征在共轭高分子体系中获得放大效应。通过对近红外手性高分子引入不同的donor与acceptor结构基团，调控发射波长，降低高分子能级带隙，提高荧光量子效率。通过手性结构基团与不同类别的共轭高分子间相互作用，产生协同效应，显著提高近红外高分子偏振荧光各向异性r值和g值。

中文关键词： 手性高分子；近红外；偏振发光；荧光材料；各向异性

英文摘要： This program is mainly focused on the design and synthsis of near-infrared circularly polarized luminescence (NIR-CPL) materials based on chiral conjugated polymers and metal-containing chiral polymer complexes. Herein, BODIPY or aza-BODIPY, binaphthol, aza-β-diketonate, salen-Zn(II)、salen-(BF2)2 chosen as chiral units or fluorophores, and benzo[2,1,3]thiadiazole, thiophene, carbazole, phenothiazine, Ru(II)/Pt(II) complexes as donor or acceptor linkers, regular and well-ordered D-π-A/D-A type chiral polymer or chiral polymer complexes can be synthesized by Pd-catalyzed cross-coupling reaction. Stable chiral feature in the conjugated polymer backbone can be greatly enlarged by special space and electron-induced group for the modification of chiral microenviroment at well-defined molecular level. Tunable emission wavelength, low band gap and high fluorescence quantum effeciency can be improved by introduction of different donor and acceptor groups in NIR chiral polymer main chain backbone. The correlation between chiral unit and various conjugated polymer structure can activate the synergic effect, which leads to obvious amplification of both the anisotropy r value and g (λ) value of NIR-CPL.

英文关键词： Chiral polymer;Near infrared;CPL;Fluorescence material;Anisotropy