FT-NMR의 High Resolution에 관한 연구 = (The) Study of high resolution for FT-NMR

다국어 초록 (Multilingual Abstract)

FT-NMR Spectroscopy is the method of getting frequency data by FT of FID signal data obtained in the time domain through RF pulse scan into the spin system excited simultaneously. Normally, by measuring FID data points at NMR, the resolution ar decided by their FT.
It's hard to distinguish those nuclei with close NMR at low external magnetic field on the whole. So we going to use simulation which is corresponding to a lot of the variable parameters. In this study, frequencies were provided to the four nuclei with high natural abundance and the high NMR frequency, and the intensities corresponding to the frequencies were applied. I verified that the unidentical intensity was provided and the signal has been amassed for two nuclei. Also I scrutinized that the nuclei of the analogous frequencies have constituted resolution of two peaks as shown in transform. Resolution with FT is determined by FID data points when the range of measurement in NMR is given and then I made a vigorous examination methods for high resolutions through simulation for two real nuclei of close. From this research, I consider that we can understand NMR and experimentally apply on the many ways.

목차 (Table of Contents)

• 목차 = ⅰ
• ABSTRACT = ⅵ
• Ⅰ. 서론 = 1
• Ⅱ. 이론 = 2
• A. NMR의 물리적 기본원리 = 2
• 1. 양자역학적 기술 = 2
• 2. 순자기화 = 5
• 3. Bloch equation = 7
• B. 이완시간 = 9
• 1. T_(1) 이완 (spin-lattice relaxation) = 9
• 2. T_(2) 이완 (spin-spin relaxation) = 10
• C. 자유유도감쇠 (FID) = 11
• D. 푸리에 변환 (Fourier transform) = 13
• Ⅲ. 모의실험 = 15
• A. FT-NMR 모의실험 = 16
• B. 실제 핵의 FID와 FT = 17
• C. 다른 세기를 가지는 두 핵에 대한 FID와 FT = 20
• D. 펄스의 증가에 따른 잡음의 감소 = 21
• Ⅳ. 실험 결과 및 고찰 = 23
• A. Lorentz-Gaussian 변환과 resolution의 관계 = 23
• B. 데이터 점의 증가에 따른 resolution의 변화 = 28
• C. 주파수의 크기를 두 배로 증가시킬 때 resolution의 변화 = 30
• D. 주파수의 크기를 증가시킨 후 두 핵에 서로 다른 조건의 세기를 입력했을 때 그 차이에 의한 resolution의 변화 = 32
• Ⅴ. 결론 = 35
• Ⅵ. 참고문헌 = 36