含CdTe量子点的荧光聚合物和含芘丁酸的荧光聚合物的合成、表征及荧光共振能量转移

报道了一种室温下制备CdTe量子点-聚合物纳米荧光聚合物的方法。首先,使用巯基乙酸(TGA)作为稳定剂在水相中合成CdTe量子点,通过十六三甲基溴化铵(CTAB)将其转移进有机相中。使用N,N-二环己基碳二亚胺(DCC)作为脱水剂将量子点挂接到侧链含有羟基的聚丙烯酸酯(CPA)上。该荧光聚合物CdTe-CPA在室温下合成,能够促进碲化镉量子点-聚合物复合物的荧光性能和稳定性。我们还通过相同的方法,将1-芘丁酸(PBA)连接到聚丙烯酸酯侧链上合成了另一种荧光聚合物P-CPA。对产物通过傅里叶变换红外光谱(FI-IR)、凝胶渗透色谱(GPC)、差示扫描量热(DSC)、透射电镜(TEM)及荧光光谱进行表征。此外还研究了P-CPA和CdTe-CPA间的荧光共振能量转移(FRET)。从吸收和荧光发射光谱得到的数据表明,在二氯甲烷溶液中,从P-CPA到CdTe-CPA间发生了荧光共振能量转移。

Synthesis,Characterization and Fluorescence Resonance Energy Transfer of Fluorescent Polymers Containing CdTe Quantum Dots and Fluorescent Polymers Containing Pyrene Butyric Acid

We reported a convenient method to prepare CdTe Quantum Dots (QDs)-polymer nanocomposite at room temperature. Firstly, we synthesized CdTe QDs in aqueous solution using thioglycolic acid (TGA) as stabilizing agent. Secondly, N,N'-dicyclohexylcarbodiimide (DCC) was used as dehydrating agent to graft CdTe QDs onto the polyacrylate (CPA) bearing hydroxyl groups. The fluorescent composite polymer CdTe-CPA was synthesized at room temperature. Therefore, it improved the fluorescence properties and stability of the CdTe QDs-polymer nanocomposite. Another fluorescent polymer P-CPA has been synthesized by connecting 1-Pyrenebutyric acid (PBA) to CPA using the same approach as mentioned above. The resulting material were characterized by Fourier transform infrared spectroscopy (FT-IR), gel permeation chromatography (GPC), differential scanning calorimetry (DSC), transmission electron microscope (TEM) and photoluminescence (PL). Forster resonance energy transfer (FRET) between P-CPA and CdTe-CPA was also studied. The data obtained from absorption and fluorescent emission spectra indicated that the FRET occurred from P-CPA to CdTe-CPA.