結構因素對PDI分子衍生物自組裝的影響
發(fā)布時間：2019-01-21 20:37
【摘要】：作為芳香烴化合物的傒酰亞胺(PDIs),是一種n型半導體材料,具有大π鍵共軛體系,是一種具有熒光性能的染料。通過分子的自組裝成不同的形貌,因其特殊的結構性能,可應用于太陽能電池,或者將光能轉化成分子機械能,或者制作成為生物熒光探針,或者因為其光電性能制備電子器件,或者因為其特殊的熒光特性對于有害氣體如胺類的特殊熒光淬滅現(xiàn)象進行環(huán)境檢測。有機分子π共軛的納米線圈由于其廣泛的實際應用前景受到了廣泛的關注。在此工作報告中,我們報道了由不對稱傒酰亞胺(PDI)分子衍生物自組裝的具有較高熒光量子產量的單分子和雙分子層的有機納米線圈。通過對21種不同結構的PDI分子衍生物的自組裝的研究,我們發(fā)現(xiàn)一些關鍵的結構參數(shù)對于形成特定形態(tài)的納米線圈有著決定性的影響。當苯基和PDI分子的氮原子直接連接時,未能發(fā)現(xiàn)PDI分子衍生物能自組裝形成具有螺旋結構的納米線圈。而當亞甲基作為苯甲氧基和PDI分子的連接作用基團時,甲氧基在苯基間位取代的PDI分子衍生物能自組裝形成具有螺旋結構的納米線圈,當只有一個甲氧基在苯基間位的情況下,能形成單分子層的納米線圈,而在苯基3,5位有2個甲氧基存在的情況下PDI分子衍生物則能自組裝形成雙分子層的納米線圈。類似的情況,當乙烯基作為苯甲氧基和PDI分子的連接作用基團時,單一的甲氧基在苯基鄰位取代時能形成具有螺旋結構的單分子層納米線圈,而當2個甲氧基在苯基鄰位和間位取代時PDI分子衍生物則形成了雙分子層的納米線圈。通過光學表征我們也能清晰的看出π-π堆積形成的J-聚合體而產生的紫外吸收和熒光發(fā)射的紅移現(xiàn)象。上述的所有的納米線圈都具有大于25%的熒光量子產率。這一類新的納米線圈結構可能在光電子、熒光傳感器、生物影像等領域有著應用前景。
[Abstract]:(PDIs), an aromatic compound, is an n-type semiconductor material with a large 蟺 bond conjugated system. It is a kind of dye with fluorescence properties. Because of its special structure and properties, it can be used in solar cells, convert light energy into molecular mechanical energy, or be made into bioluminescence probes. Either electronic devices are fabricated because of their optoelectronic properties, or because of their special fluorescence characteristics, the special fluorescence quenching phenomena of harmful gases such as amines are detected in the environment. Organic 蟺-conjugated nanocoils have attracted wide attention due to their wide application prospects. In this report, we report the self-assembled organic nanocoils with high fluorescence quantum yield of single and bimolecular layers from asymmetric (PDI) molecular derivatives. By studying the self-assembly of 21 PDI molecular derivatives with different structures, we find that some key structural parameters have a decisive effect on the formation of nano-coils of specific morphology. When phenyl and nitrogen atoms of PDI molecule are connected directly, it is not found that the derivatives of PDI molecule can self-assemble to form nano-coils with helical structure. However, when methylene acts as a binding group between benzomethoxy and PDI molecules, the derivatives of PDI molecules, which are substituted in phenyl position, can self-assemble into nanospheres with helical structure, when there is only one methoxy group at the phenyl interposition. Nanocoils with monolayer can be formed, while PDI molecular derivatives can self-assemble into bilayer nanocoils in the presence of 2 methoxyl groups at phenyl 3. Similarly, when vinyl acts as a connecting group of benzomethoxy and PDI molecules, a single methoxy group can form a monolayer nanocoil with a helical structure when the phenyl is substituted at the ortho position. However, when two methoxy groups are substituted at the ortho and m position of phenyl, the PDI molecular derivatives form a bimolecular layer of nanometallic coils. Through optical characterization, we can also clearly see the red shift phenomenon of ultraviolet absorption and fluorescence emission caused by the formation of J-polymer formed by 蟺-蟺. All of these nanocoils have a fluorescence quantum yield of more than 25%. This new type of nanocoils may be widely used in photoelectron, fluorescence sensor, biological imaging and so on.
【學位授予單位】：青島大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：O641.3;TB383.1
本文編號：2413016
[Abstract]:(PDIs), an aromatic compound, is an n-type semiconductor material with a large 蟺 bond conjugated system. It is a kind of dye with fluorescence properties. Because of its special structure and properties, it can be used in solar cells, convert light energy into molecular mechanical energy, or be made into bioluminescence probes. Either electronic devices are fabricated because of their optoelectronic properties, or because of their special fluorescence characteristics, the special fluorescence quenching phenomena of harmful gases such as amines are detected in the environment. Organic 蟺-conjugated nanocoils have attracted wide attention due to their wide application prospects. In this report, we report the self-assembled organic nanocoils with high fluorescence quantum yield of single and bimolecular layers from asymmetric (PDI) molecular derivatives. By studying the self-assembly of 21 PDI molecular derivatives with different structures, we find that some key structural parameters have a decisive effect on the formation of nano-coils of specific morphology. When phenyl and nitrogen atoms of PDI molecule are connected directly, it is not found that the derivatives of PDI molecule can self-assemble to form nano-coils with helical structure. However, when methylene acts as a binding group between benzomethoxy and PDI molecules, the derivatives of PDI molecules, which are substituted in phenyl position, can self-assemble into nanospheres with helical structure, when there is only one methoxy group at the phenyl interposition. Nanocoils with monolayer can be formed, while PDI molecular derivatives can self-assemble into bilayer nanocoils in the presence of 2 methoxyl groups at phenyl 3. Similarly, when vinyl acts as a connecting group of benzomethoxy and PDI molecules, a single methoxy group can form a monolayer nanocoil with a helical structure when the phenyl is substituted at the ortho position. However, when two methoxy groups are substituted at the ortho and m position of phenyl, the PDI molecular derivatives form a bimolecular layer of nanometallic coils. Through optical characterization, we can also clearly see the red shift phenomenon of ultraviolet absorption and fluorescence emission caused by the formation of J-polymer formed by 蟺-蟺. All of these nanocoils have a fluorescence quantum yield of more than 25%. This new type of nanocoils may be widely used in photoelectron, fluorescence sensor, biological imaging and so on.
【學位授予單位】：青島大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：O641.3;TB383.1
【參考文獻】
中國期刊全文數(shù)據(jù)庫 前1條
1 張秀鳳;陳蕾;楊千帆;孫曉然;陳宏博;楊光;唐亞林;;黃腐酸對菁染料超分子組裝及手性調控研究[J];光譜學與光譜分析;2014年11期
，本文編號：2413016
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