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Abstract I
摘要 II
Table of Contents III
List of Scheme V
List of Tables V
List of Figures V
Chapter 1 General Introduction 1
1-1 Background of Chemosensors 1
1-2 Introduction to Fluorene 3
1-3 Introduction to Crown Ether 4
1-4 Photoinduced Electron Transfer, PET 5
1-4-1 Principles 5
1-4-2 Crown-containing PET Sensors 6
1-5 Photoinduced Charge Transfer, PCT 7
1-5-1 Principles 7
1-5-2 Crown-containing PCT Sensors 9
1-6 Research Motivation 11
Chapter 2 Theoretical Background 13
2-1 Theory of Fluorescence 13
2-2 Solvent Effects on Emission Spectra 16
2-3 Fluorescence Quenching 17
2-3-1 Dynamic Quenching 18
2-3-2 Static Quenching 19
2-3-3 Sphere of Action Model 21
2-4 Energy Transfer 22
2-5 Reaction Mechanism 26
Chapter 3 Experimental Section 27
3-1 Instruments of Chemical Synthesis 27
3-2 Measurements 27
3-3 Preparation of Metal Ion Solutions and Titration 30
3-4 Materials 31
3-5 Synthetic Scheme of Chemosensor FTC 32
3-6 Synthesis of Chemosensor FTC 33
Chapter 4 Results and Discussion 37
4-1 Synthesis and Characterization 37
4-1-1 1H NMR of FTC 37
4-1-2 COSY of FTC 38
4-1-3 NOESY of FTC 38
4-1-4 13C NMR of FTC 39
4-1-5 FT-IR of FTC 39
4-1-6 Elemental Analysis 50
4-2 Electrochemical Properties 51
4-3 Optical Properties 53
4-3-1 Optical Properties and Band Gap of FTC 53
4-3-2 Influence of Solvent on Absorption and Fluorescence
Spectra 54
4-3-3 Chemosensory Fluorescence Responds to Metal Ions 56
4-3-4 Mechanism of Spectra Change 60
4-3-5 Response Sensitivity towards Fe3+ 62
4-3-6 Selectivity of FTC towards Fe3+ 67
4-3-7 Influence of pH on Absorption and Fluorescence
Spectra 68
Chapter 5 Conclusions 71
Reference 72
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