发近红外光的高分子铒络合物的合成及性能研究  

SYNTHESIS AND PROPERTIES OF NEAR-INFRARED LUMINESCENT POLYMERIC ERBIUM-COMPLEXES

作　　者：张春燕[1] 罗建新[1] 

机构地区：[1]湖南工学院材料与化学工程学院,衡阳421002

出　　处：《高分子学报》2012年第11期1289-1294,共6页Acta Polymerica Sinica

基　　金：湖南工学院科学研究项目(项目号HY11022);湖南工学院博士科研启动基金;湖南省重点学科建设项目

摘　　要：以1倍的三氯化铒(ErCl3)与2倍的8-羟基喹啉(Q)和1倍的5-(2-甲基丙烯酰乙氧基甲氧基)-8-羟基喹啉(HEMA-CH2-Q)反应合成了一种8-羟基喹啉铒络合物单体(ErQ2(HEMA-CH2-Q)),然后与N-乙烯基咔唑(NVK)通过自由基共聚合成了一种新型的高分子铒络合物(PCzErQ3).用元素分析、核磁共振谱(1H-NMR)、红外光谱(FTIR)、凝胶渗透色谱(GPC)、差示扫描量热法(DSC)、热重分析(TGA)、紫外-可见(UV-Vis)吸收光谱、光致发光(PL)光谱和荧光寿命等方法对其进行结构表征和性能测试.该高分子铒络合物能溶于一般的有机溶剂,具有较好的热稳定性.光致发光光谱表明,通过激发配位基团(8-羟基喹啉)和光捕获基团(咔唑),该高分子铒络合物能发射铒离子的特征近红外光,在光通信和生物医学等领域具有广阔的应用前景.A monomer （ErQ2 （HEMA-CH2-Q ）） containing 8-hydroxyquinoline erbium complex was synthesized by two-step coordination reaction. First, a methanol solution of ErC13 was added to a methanol solution of 8-hydroxyquinoline under stirring with the molar ratio of Er3 ＋/HQ being 1 ： 2 to obtain ErQ2 C1. Secondly, ErQ2 C1 was coordinated with 5-（2-methacryloylethyloxymethyl）-8-quinolinol （ HEMA-CH2-Q ）. Thereafter,novel polymeric Er-complexes were prepared by free radical copolymerization of the monomer and N-vinylearbazole （NVK）. The structure and the properties of the polymeric Er-complexes were studied by elemental analysis, nuclear magnetic resonance spectroscopy （1H-NMR）, Fourier transform infrared spectroscopy （FTIR） , gel permeation chromatography （ GPC ） , differential scanning calorimetry （ DSC ） , thermogravimetric analysis （TGA）, UV-Vis absorption spectra, photoluminescence （PL） spectra and PL lifetime. The polymeric Er-eomplexes involve 8-hydroxyquinoline erbium complex moieties and NVK segments, exhibiting good solubility in a wide range of organic solvents and excellent thermal stability. The glass transition temperature （Tg） and the temperature of 5% weight loss （Td） for the polymeric Er-complexes were around 210~C and 373~C ,respectively. The number average molecular weight of the polymeric Er-complexes was 9000 - 15000. Excited with UV light of different wavelengths （300,345 and 390 nm） , the polymeric Er-complex emitted the characteristic near-infrared （NIR） -light of ErIllions. The result indicates that the energy absorbed by earbazole （light-harvesting group） was transferred to 8-hydroxyquinoline （coordinate group） , where it is finally transferred to Erm ion. In addition,the full width at half maximum （FWHM） in the PL emission spectra of the copolymers was above 90 nm,which enabled a wide gain bandwidth for optical amplification.

关 键 词：铒离子 8-羟基喹啉 N-乙烯基咔唑 近红外发光 高分子 

分 类 号：O634[理学—高分子化学]