Study of lanthanides nanocrystals as heterogeneous catalyst
This thesis focuses on utilizing lanthanide based nanocrystals for various form of catalysis and evaluating their effectiveness. We have characterized the nanocrystals in this studies in detailed. The nanocrystals synthesized were used in various reactions to show versatility. Chapter 2 analyses...
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| Other Authors: | |
| Format: | Thesis-Master by Research |
| Language: | English |
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Nanyang Technological University
2023
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/164000 |
| _version_ | 1826115984229924864 |
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| author | Lee, Ming Da |
| author2 | Edwin Yeow |
| author_facet | Edwin Yeow Lee, Ming Da |
| author_sort | Lee, Ming Da |
| collection | NTU |
| description | This thesis focuses on utilizing lanthanide based nanocrystals for various form of
catalysis and evaluating their effectiveness. We have characterized the nanocrystals in this
studies in detailed. The nanocrystals synthesized were used in various reactions to show
versatility.
Chapter 2 analyses the effectiveness of lanthanide based nanoparticles as a Lewis acid
catalyst. YbF3 nanoparticles in this study were synthesized through the co-precipitation method
and characterized using transmission electron microscope (TEM), and x-ray diffraction (XRD).
The light to heat efficiency of the crystals were determined. The nanoparticles were used as a
photothermal Lewis acid catalyst for the reaction between epoxides and amines obtaining
excellent yield. The catalyst showed great results even after being recycling.
In chapter 3, we attempted to utilize chiral ligands with YbF3 nanocrystals to achieve
enantioselectivity which was unsuccessful. We changed our approach into modifying YbF3
nanocrystals into a chiral catalyst. Which was unsuccessful due to the lack of a chiral
environment on the surface of the particle. Which was identified using Spectroscopy methods
like Uv-Vis absorption spectroscopy and florescence emission spectroscopy. |
| first_indexed | 2024-10-01T04:04:00Z |
| format | Thesis-Master by Research |
| id | ntu-10356/164000 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:04:00Z |
| publishDate | 2023 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-10356/1640002024-08-15T02:46:45Z Study of lanthanides nanocrystals as heterogeneous catalyst Lee, Ming Da Edwin Yeow School of Chemistry, Chemical Engineering and Biotechnology EdwinYeow@ntu.edu.sg Science::Chemistry::Physical chemistry This thesis focuses on utilizing lanthanide based nanocrystals for various form of catalysis and evaluating their effectiveness. We have characterized the nanocrystals in this studies in detailed. The nanocrystals synthesized were used in various reactions to show versatility. Chapter 2 analyses the effectiveness of lanthanide based nanoparticles as a Lewis acid catalyst. YbF3 nanoparticles in this study were synthesized through the co-precipitation method and characterized using transmission electron microscope (TEM), and x-ray diffraction (XRD). The light to heat efficiency of the crystals were determined. The nanoparticles were used as a photothermal Lewis acid catalyst for the reaction between epoxides and amines obtaining excellent yield. The catalyst showed great results even after being recycling. In chapter 3, we attempted to utilize chiral ligands with YbF3 nanocrystals to achieve enantioselectivity which was unsuccessful. We changed our approach into modifying YbF3 nanocrystals into a chiral catalyst. Which was unsuccessful due to the lack of a chiral environment on the surface of the particle. Which was identified using Spectroscopy methods like Uv-Vis absorption spectroscopy and florescence emission spectroscopy. Master of Science 2023-01-03T05:52:02Z 2023-01-03T05:52:02Z 2022 Thesis-Master by Research Lee, M. D. (2022). Study of lanthanides nanocrystals as heterogeneous catalyst. Master's thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/164000 https://hdl.handle.net/10356/164000 10.32657/10356/164000 en This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0). application/pdf Nanyang Technological University |
| spellingShingle | Science::Chemistry::Physical chemistry Lee, Ming Da Study of lanthanides nanocrystals as heterogeneous catalyst |
| title | Study of lanthanides nanocrystals as heterogeneous catalyst |
| title_full | Study of lanthanides nanocrystals as heterogeneous catalyst |
| title_fullStr | Study of lanthanides nanocrystals as heterogeneous catalyst |
| title_full_unstemmed | Study of lanthanides nanocrystals as heterogeneous catalyst |
| title_short | Study of lanthanides nanocrystals as heterogeneous catalyst |
| title_sort | study of lanthanides nanocrystals as heterogeneous catalyst |
| topic | Science::Chemistry::Physical chemistry |
| url | https://hdl.handle.net/10356/164000 |
| work_keys_str_mv | AT leemingda studyoflanthanidesnanocrystalsasheterogeneouscatalyst |