| Abstract: | 本論文主要在研究新型聯吡啶鹽類(2,2’-bipyridnium)的離子液體及奈米材料上的應用。聯吡啶的製備參考相關文獻修正後，合成出帶有烷基長碳鏈的醯胺、酯官能基化合物，在將這些化合物合成的三系列離子化合物。聯吡啶基鹽離子化合物共有Cl-、Br-、I-、PF6-、ClO4-、BF4-、TFA及Triflate八種陰離子。由實驗結果發現化合物10c dibutyl-1-methyl-2,2’-bipyridnium-3,3’-dicarboxylate tetrafluoroborate有最低的熔點；陽離子烷基長度與熔點的關係，以理論計算統計出偶極距與熔點表現曲線並探討之間的相對關係，低偶極距會有高熔點、高偶極距有低熔點的行為表現。在奈米金粒子方面的探討，以自行合成的新穎離子液體添加到奈米金溶液，離子化合物修飾在奈米金粒子表面上，使金粒子之間的距離靠近卻不會聚集產生沉澱，並改變奈米金粒子的形狀，成功的修飾奈米金粒子，未來探討其應用的價值。
Ionic liquids, ionic salts with melting point lower than 100 degree, can be regarded as the media for chemical reactions. The nonvolatile nature of ionic liquid gives us significant advantage in minimizing solvent consumption. Not only providing eco-friendly reaction media but ionic liquids share the important physical property of highly thermal stable ability and exhibiting quite distinct chemical properties in terms of polarity, nucleophilicity and hydrogen bonding properties. These ionic liquids have attracted much attention as promising green solvents in recent years.
The reactions of 2,2’-bipyridine-3,3’ –dicarboxylic acid , N,N’ -dialkyl-2,2’-bipyridine-3,3’-dicarbamide and dialkyl-2,2’-bipyridine -3,3’-dicarboxylate and with alkyl iodide obtain three series of salts. Then the anion exchange reaction was carried out to transform these iodide salts into other anions form, for example, chloride, bromide, perchlorate, hexafluorophosphate, trifluoroacetate, trifluoromethanesulfonate, etc. These ionic compounds have lower melting points. Some of them are lower than 100 degree. We added ionic liquids into sphere gold nanoparticle solution, and we got new nanostructure. |
