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標題: | 立體效應對於含有五苯荑之鉑錯合物之力致與蒸氣致變色放光研究 Steric Effects on the Mechanochromic and Vapochromic Luminescence of Pentiptycene-Containing Platinum(II) Complexes |
作者: | Chen-Yu Lien 連晨宇 |
指導教授: | 楊吉水(Jye-Shane Yang) |
關鍵字: | 五苯荑,刺激響應材料,二價鉑錯合物, pentiptycene,stimuli-responsive material,Pt(II) complex, |
出版年 : | 2019 |
學位: | 碩士 |
摘要: | 在先前的工作中,本實驗室將五苯荑炔基團引入環金屬鉑錯合物中,成功使分子在固態時具有力致以及蒸氣致變色放光。但是,由於較強的分子間π-π或是金屬-金屬作用力,其光色僅有黃至紅的變化。為了使放光藍移而增加顏色的對比,本研究中我們增加分子的立體障礙,期待分子間作用力能有更大程度的變化。我們合成兩個具有五苯荑以及叔丁基的目標鉑錯合物,以及一個不含五苯荑的錯合物作為對照。藉由輾磨或是薰上有機物蒸氣等操作,三個錯合物皆可產生類似於單體(monomer)的綠色放光以及激態雙體(excimer)導致的紅(或橘)色放光。而五苯荑基團可避免放光發生聚集引致淬熄(aggregation-caused quenching),並且使從溶液態初始製備的分子具有同質多形體(polymorph)。我們再次展現五苯荑衍生物在刺激響應材料的應用潛力,並且說明適當的立體障礙對於設計此類分子之重要性。 In previous work, we have combined the pentiptycene-acetylene group and the N^C^N ligand to form a Pt(II) complex with mechanochromic and vapochromic luminescence in the solid state. However, the emission color only ranged from yellow to red, which was attributed to strong intermolecular π-π or metallophilic interactions. In order to achieve higher color contrast with more blue-shifted emission, here we enhanced the steric hindrance of the complexes to induce more drastic variation of intermolecular interactions. Two Pt(II) target complexes with the pentiptycene moiety and tert-butyl groups, and another pentiptycene-free reference complex were prepared. By operation such as grinding or vapor-fuming, all the complexes could exhibit monomer-like and excimer emission with color ranging from green to red (or orange). The pentiptycene scaffold effectively prevented the luminescence from aggregation-caused quenching and induced the formation of polymorphic as-prepared solids. In summary, we again demonstrated the potential of pentiptycene derivatives for stimuli-responsive materials, and revealed the importance of appropriate steric hindrance for designing such molecules. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/77268 |
DOI: | 10.6342/NTU201903100 |
全文授權: | 未授權 |
顯示於系所單位: | 化學系 |
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ntu-108-R06223118-1.pdf 目前未授權公開取用 | 32.41 MB | Adobe PDF |
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