利用计算机模拟探究DQF-COSY谱中杂峰的抑制  

Computer Simulation on Suppression of Undesired Peaks in DQF-COSY Spectroscopy

作　　者：朱小钦[1] 陈忠[2] 

机构地区：[1]福建师范大学激光与光电子技术研究所,福建福州350007 [2]厦门大学物理系,福建厦门361005

出　　处：《泉州师范学院学报》2009年第6期27-29,35,共4页Journal of Quanzhou Normal University

基　　金：国家自然科学基金项目(10774125);福建省教育厅基金项目(JA08047)

摘　　要：改进DQF-COSY脉冲序列,结合适当的相位循环并选取合适的脉冲翻转角来获得相关谱,再利用计算机模拟对理论设计进行验证.模拟结果表明:改进的DQF-COSY谱图比利用常规DQF-COSY脉冲序列获得的谱图简单许多,基本没有杂峰,易于判断具有标量耦合的核间键连关系.Method to suppress the undesired peaks in double-quantum-filtered COSY spectra is supposed. Analytical expressions are derived from the modified Bloch equations with dipolar fields. All numerical simulation results are in excellent agreement with the theoretical predictions. Compared with the COSY or conventional DQF-COSY sequence, the improved sequence will effectively suppress undesired intermolecular single-quantum coherence signals. It is important for research in molecular structure.

关 键 词：核磁共振 双量子滤波相关谱 分子间单量子相干 

分 类 号：O641[理学—物理化学]