福建师范大学学报（自然科学版）
福建師範大學學報（自然科學版）
복건사범대학학보（자연과학판）
JOURNAL OF FUJIAN TEACHERS UNIVERSITY (NATURAL SCIENCE EDITION)
2009年
6期
37-41
,共5页
核磁共振%分子内与分子间双量子相干%脉冲序列
覈磁共振%分子內與分子間雙量子相榦%脈遲序列
핵자공진%분자내여분자간쌍양자상간%맥충서렬
NMR%intra- and inter-molecular double-quantum coherences%pulse sequence
设计简化的三脉冲序列,研究高极化液体核磁共振中同核自旋体系中的分子内与分子间双量子相干信号随预备期的变化规律,有助于更深入地理解分子内与分子间双量子相干的性质与机理,为分离检测二者提供理论和实验依据.首先对普适的同核二自旋IpSq (p,q = 1,2,3,…)体系进行理论推导,得到分子内与分子间多量子相干信号与预备期的关系表达式,并利用6种不同的自旋体系进行实验验证,实验结果与理论推导结果相当吻合.这种方法还可以扩展到异核自旋体系中,对分子结构的研究具有重要的意义.
設計簡化的三脈遲序列,研究高極化液體覈磁共振中同覈自鏇體繫中的分子內與分子間雙量子相榦信號隨預備期的變化規律,有助于更深入地理解分子內與分子間雙量子相榦的性質與機理,為分離檢測二者提供理論和實驗依據.首先對普適的同覈二自鏇IpSq (p,q = 1,2,3,…)體繫進行理論推導,得到分子內與分子間多量子相榦信號與預備期的關繫錶達式,併利用6種不同的自鏇體繫進行實驗驗證,實驗結果與理論推導結果相噹吻閤.這種方法還可以擴展到異覈自鏇體繫中,對分子結構的研究具有重要的意義.
설계간화적삼맥충서렬,연구고겁화액체핵자공진중동핵자선체계중적분자내여분자간쌍양자상간신호수예비기적변화규률,유조우경심입지리해분자내여분자간쌍양자상간적성질여궤리,위분리검측이자제공이론화실험의거.수선대보괄적동핵이자선IpSq (p,q = 1,2,3,…)체계진행이론추도,득도분자내여분자간다양자상간신호여예비기적관계표체식,병이용6충불동적자선체계진행실험험증,실험결과여이론추도결과상당문합.저충방법환가이확전도이핵자선체계중,대분자결구적연구구유중요적의의.
A three-pulse sequence was designed to investigate the variations of intra- and inter-molecular double-quantum coherences with preparation period. It will help to better understand the properties and mechanism of intra- and inter-molecular multiple-quantum coherences. IpSq (p,q= 1, 2, 3, …) spin system were focused to deduce the theoretical relations between different signals and preparation periods. Furthermore, six spin systems were used to verify the theoretical results. The experimental observations are matched well with the analytical expressions. The method proposed herein will be extended to heteronuclear cases. It may find potential application in molecular structure research.
