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Title Page 2
ABSTRACT 5
국문 초록 6
PREFACE 8
Contents 9
NOMENCLATURE 13
CHAPTER 1. INTRODUCTION 14
CHAPTER 2. MATERIALS AND METHODS 17
2.1. General methods 17
2.2. Synthetic scheme 18
2.3. Synthetic methods 19
2.3.1. Synthesis of Guest molecule 19
2.3.2. Synthesis of Host molecule 19
2.3.3. Synthesis of Rotaxanes 19
2.4. Preparation of Supramolecular 2-D sheet materials 21
2.5. Treatment of the 2D sheet with a reducing agent 21
2.6. Transmission Electron Microscopy (TEM) experiments 21
2.7. Scanning Electron Microscopy (SEM) experiments 21
2.8. Cell culture experiments 21
2.9. Methylthiazolyldiphenyl-tetrazolium bromide (MTT) assay 22
2.10. Statistical analysis 22
CHAPTER 3. RESULTS 23
3.1. Synthesis of Rotaxanes 23
3.1.1. Analysis of Guest molecule 24
3.1.2. Analysis of Host molecule 26
3.1.3. Analysis of Rotaxanes 28
3.2. Self-assembly of rotaxanes 34
3.3. Structural changes induced by Guest molecule 39
3.4. Mechanism study of structural transformation 43
3.5. In vitro experiments with supramolecular structures 46
CHAPTER 4. CONCLUSION 51
REFERENCES 52
Figure 1. (a) Molecular structure of host molecule. (b) Molecular structure of stopper... 16
Figure 2. ¹H-NMR and ¹³C-NMR spectrum of Guest molecule in D₂O 24
Figure 3. ESI mass spectrum of Guest molecule 25
Figure 4. ¹H-NMR and ¹³C-NMR spectrum of Host molecule in CDCI₃ 26
Figure 5. MALDI-TOF mass spectrum of Host molecule 27
Figure 6. Analytic HPLC spectrum of Rotaxane 5 analyzed via reverse-phase HPLC... 28
Figure 7. MALDI-TOF mass spectrum of Rotaxane 5 29
Figure 8. ¹H-NMR spectrum of Rotaxane 5 at 1 mM in DMSO-d₆ 30
Figure 9. Analytic HPLC spectrum of Rotaxane 6 analyzed via reverse-phase HPLC... 31
Figure 10. MALDI-TOF mass spectrum of Rotaxane 6 32
Figure 11. ¹H-NMR spectrum of Rotaxane 6 at 1 mM in DMSO-d₆ 33
Figure 12. Critical aggregation concentration (CAC) study of Rotaxanes. Absorption spectra... 35
Figure 13. TEM image of (a) Rotaxane 5 (b) Rotaxane 6 at 100 μM in DW 36
Figure 17. TEM image of Rotaxane 5 at 100 μM (a) before reducing agent (NaBH₄)... 40
Figure 18. FOM image of Rotaxane 5 at 100 μM (a) before reducing agent (NaBH₄)... 41
Figure 19. TEM and FOM images of Rotaxane 6 at 100 μM after reduction with NaBH₄ in... 42
Figure 20. (a) The three interchangeable redox states of viologen. (b) NMR studies based... 44
Figure 21. (a) UV absorption wavelength changes of self-assembled Rotaxane 5 with... 45
Figure 22. FOM images (DAPI filter) of HeLa cell. (Rotaxane at 100 μM and NaBH₄ was... 47
Figure 23. Normalised mean fluorescence intensity (MFI) of 100 μM of Rotaxane 5, 6 and... 48
Figure 24. FOM images (DAPI filter) of NIH3T3 cell. (scale bar, 10μm.) 49
Figure 25. Cell viability of (a) HeLa cells and (b) NIH3T3 cells incubated with different... 50
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