溶劑脫附誘導金屬有機骨架之快速結晶研究 ; Rapid Desolvation-Triggered Crystallization in Metal-Organic Frameworks
| العنوان: | 溶劑脫附誘導金屬有機骨架之快速結晶研究 ; Rapid Desolvation-Triggered Crystallization in Metal-Organic Frameworks |
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| المؤلفون: | 錢毅, Chien, I |
| المساهمون: | 林嘉和, Lin, Chia-Her |
| سنة النشر: | 2022 |
| المجموعة: | National Taiwan Normal University: NTNU Institutional Repository / 國立臺灣師範大學圖書館 |
| مصطلحات موضوعية: | 溶劑置換, 加熱抽真空, 快速結晶化, 金屬有機骨架, Solvent replacement, Heating and Vacuuming, Rapid Crystallization, Metal-Organic Frameworks |
| الوصف: | 金屬有機骨架(MOF)成核過程主要以溶劑中自組裝而直接生成有序的結晶性多孔材料，但其製程需要花費高昂的時間成本，本研究以第四代MOF的無序化及缺陷結構為基礎，以短時間合成MOF的前驅物後，透過加熱抽真空的溶劑脫附，驅動無序化結構轉成高度結晶化之孔洞結構，並驗證了不同價數金屬與多牙配位基的前驅物符合溶劑脫附誘導快速結晶化的轉化過程，並優化各MOF結構的反應時間與條件。論文的第一部分探討了三種不同拓樸結構的MOF材料: PCN-222(Zr)、PCN-333(Al)與PCN-777(Zr)，前驅物在雙溶劑置換下透過加熱抽真空的溶劑快速脫附方法，使其由無序化轉為有序化的過程。在性質鑑定上，以粉末X-ray繞射(XRD)進行結構鑑定，場發射式掃描電子顯微鏡(FE-SEM)進行顆粒形狀的觀察與比表面積及孔隙分析儀(BET)檢測吸附效能，結果證明了溶劑脫附誘發快速結晶化的轉化。第二部分實驗優化三種MOF結構的反應時間，藉由調控前驅物的反應時間，並經由溶劑脫附誘發快速結晶過程後進行性質鑑定，結果表明原始產物需要反應時間12小時到2天不等，再藉由溶劑脫附誘發快速結晶過程可以使反應時間壓縮至2~3小時，時間壓縮將近25% ~ 95%，並具有相近的孔洞性能。第三部分實驗為了拓展了溶劑置換的應用，藉由溶劑置換下添加客體分子或是在反應過程中額外添加調節劑及添加劑等方式，再經由XRD與BET等鑑定結果後，顯示了外添加調節劑對於溶劑脫附誘發快速結晶過程也有正向的輔助效果。 ; In recent years, the research point of view, the MOF nucleation process mainly uses self-assembly in a solvent to directly generate ordered crystalline porous materials, but the process requires high time and cost. This research is based on the disordered and defect structure of the fourth-generation MOF. After a shorter synthesis time of the MOF, the solvent desorption through heating and vacuuming drives the disordered structure into a highly crystalline porous structure. It was verified that the precursors of metals with different valences and polydentate ligands accord with the hypothesis of solvent desorption-induced rapid crystallization, and the reaction time and conditions of each structure were optimized.The first part of the paper discusses three materials with different topologies: PCN-222 (Zr), PCN-333 (Al) and PCN-777 (Zr). The precursors are quickly removed by heating and vacuuming the solvent under dual solvent displacement. Attached methods to make it a process of transforming from disorder to order. In terms of property identification, powder X-ray diffraction (XRD) was used for structure identification, field emission scanning electron microscope (FE-SEM) was used to observe particle shape and specific surface area and pore analyzer (BET) to detect adsorption efficiency. The hypothesis that solvent desorption induces rapid crystallization is proved.The second part of the ... |
| نوع الوثيقة: | other/unknown material |
| اللغة: | Chinese |
| Relation: | 60842095S-40982; https://etds.lib.ntnu.edu.tw/thesis/detail/63a824ae3b79b316ab54e80ae3bc90a8/; http://rportal.lib.ntnu.edu.tw/handle/20.500.12235/117271 |
| الاتاحة: | http://rportal.lib.ntnu.edu.tw/handle/20.500.12235/117271 https://hdl.handle.net/20.500.12235/117271 https://etds.lib.ntnu.edu.tw/thesis/detail/63a824ae3b79b316ab54e80ae3bc90a8/ |
| رقم الانضمام: | edsbas.C8E02893 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |