| 研究生: |
陳亞倫 Chen, Ya-Lun |
|---|---|
| 論文名稱: |
銥(III)環金屬錯合物(1)化學感測器研究與應用(2) X-ray分析 The study and application of Ir(III) complex (1) in chemosensors (2) X-ray analysis |
| 指導教授: |
黃福永
Huang, Fu-Yung |
| 學位類別: |
碩士 Master |
| 系所名稱: |
理學院 - 化學系 Department of Chemistry |
| 論文出版年: | 2011 |
| 畢業學年度: | 99 |
| 語文別: | 英文 |
| 論文頁數: | 117 |
| 中文關鍵詞: | 銥金屬 、感測器 |
| 外文關鍵詞: | iridium, chemosensor |
| 相關次數: | 點閱:55 下載:2 |
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在本研究中,我們合成了兩種具有偵測重金屬功能的銥金屬(III)錯合物 : [Ir(pba)2pbi]與[Ir(ppm)2pbi]。 配位基pbi上之氮原子所具有的孤電子的存在,是使之能夠偵測到Hg2+、Ce3+、Cr3+以及Fe3+等金屬離子的原因。氮原子與這些金屬離子之間的作用力,可從吸收光譜與放光光譜的變化得知。從吸收光譜中我們可以看到等吸收點的存在,而從放光光譜中我們也發現與金屬離子錯合前後,錯合物的放光強度也會有不同程度的改變。
為了確認錯合物的醛基以及氫氧基的部位確實沒有與金屬陽離子結合的能力,我們合成[Ir(pba)2bpy](PF6)與[Ir(ppm)2bpy](PF6)以作為對照。即使[Ir(pba)2bpy](PF6)的放光強度比起[Ir(pba)2pbi]還要強很多,但是Ir(pba)2bpy](PF6)卻沒有表現出任何能夠偵測金屬的能力。
其次我們利用X-RAY數據分析晶體的鍵長與鍵角,發現到與理論計算方法(DFT)分析結果不ㄧ樣,因此有必要再做進一步的探討。
In this studies, we had successfully synthesized two Ir(III)-complexes, [Ir(pba)2pbi] and [(ppm)2pbi], in which the moiety of pba is 4-(pyridin-2-yl)benzaldehyde, the pbi moiety is 2-(pyridine-2-yl)-H-benzo[d]imidazole, and the ppm mpiety is (4-( pyridine-2-yl)phenyl)methanol. Both complexes are capable of chelating with heavy metal ion and concomitantly appear different color. The lone-paired electrons on the nitrogen atom of the pbi ligand was responsible for chelating with the following metal ions: Hg2+ , Ce3+, Cr3+ and Fe3+ . The interactions between Nitrogen of (pbi) and various metal ions interaction was found based on the data of UV-VIS and luminescence spectra .
In order to examine why the carbonyl group of pba or the hydroxyl oxygen atoms is unable to semi-coordinating with metal ion, [Ir(pba)2bpy](PF6) and [Ir(ppm)2bpy](PF6) had been synthesized and been used as a comparison . The carbonyl oxygen of [Ir(pba)2bpy](PF6) failed to chelating the metal ions, even the luminescence intensities were found much higher than that of [Ir(pba)2pbi] .
We further employed X –RAY crystallographic data to analysis the bond length and bond angle of the complexes, and found that the data obtained from the crystallography is different from that obtained from theory calculations. It is thus interesting to study further.
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