含硫醇基或羧基之樹枝狀高分子衍生物其合成與性質研究

以收斂型的合成方法，合成出一系列中心核為triazine、末端基為dioctyl的樹枝狀高分子(GnNH，n=1,2,3,4)。將此樹枝狀高分子末端的連接基進行改質，產生兩種不同連接基的樹枝狀高分子:GnSH (n=1,2,3,4)和GnCOOH (n=1,2,3)。在含有硫醇基(-SH)的樹枝狀高分子存在下，sodium borohydride當還原劑，用Brust兩相法(水-甲苯)來還原AuCl4-，形成表面由含有硫醇基(-SH)的樹枝狀高分子包覆的金奈米粒子溶液。經由穿隧式電子顯微鏡，可得知此奈米粒子的粒徑在3~5 奈米。含有羧基(-COOH)的樹枝狀高分子經由偏光顯微鏡觀察後，沒有發現有液晶的性質。因此，將此樹枝狀高分子與八種不同的配子混合成氫鍵型複合物，經由偏光顯微鏡觀察，也沒有發現液晶的性質。

關鍵字

樹枝狀高分子；金奈米粒子；液晶

並列摘要

A series of dendrimer (GnNH, n=1, 2, 3, 4), using triazine as central cores and dioctylamine as terminal functionalitie were prepared by a convergent method. Two functional dendrimers (GnSH and GnCOOH) were prepared by reaction of terminal linking group of GnNH with gamma-thiobutyrolacton or maleic anhydride. Using Brust’s two phase (water-toluene) reduction of AuCl4- by sodium borohydrid in the presence of a mercapto-containing dendrimer, solutions of gold nanoparticle bearing a surface coating of mercapto-containing dendrimer have been prepared. By TEM (Transmission Electron Microscopy) analyses, the nanoparticle diameters were measured to be 3~5 nm approximately. 英文摘要 By POM (Polarized Optical Microscope) analyses, all carboxyl-containing dendrimer does not show any mesogenic phase. Also, hydrogen bonding complexes from carboxyl-containing dendrimer and eight different porton acceptors does not show any mesogenic phase.

並列關鍵字

dendrimer ； gold nanoparticle ； liquid crystal

參考文獻

1.Tomalia, D. A.；Naylor, A. M.；Goddard III, W. A. Angew .Chem. Int. Ed. 1990, 29, 138-175.

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