不同耦合构型多自旋体系单重态制备效率研究

王子文,辛家祥,魏达秀,姚叶锋

Preparation Efficiency of Singlet States in Multi-spin Systems with Different Coupling Configurations

WANG Ziwen,XIN Jiaxiang,WEI Daxiu,YAO Yefeng

图6 (a) NAA分子的结构示意图，其中H1、H2、H3为文中考虑的三自旋体系，H1、H2为单重态自旋对；(b) NAA三自旋在强耦合情况下的单脉冲模拟谱图；(c) NAA三自旋在强耦合情况下使用单重态滤波脉冲序列的模拟谱图；(d) NAA三自旋在强耦合情况下的单脉冲实验谱图；(e) NAA三自旋在强耦合情况下的单重态滤波脉冲序列的实验谱图；(f) NAA三自旋在弱耦合情况下的单脉冲模拟谱图；(g) NAA三自旋在弱耦合情况下使用单重态滤波脉冲序列的模拟谱图；(h) NAA三自旋在弱耦合情况下的单脉冲实验谱图；(i) NAA三自旋在弱耦合情况下的单重态滤波脉冲序列实验谱图

Fig. 6 (a) Schematic representation of the structure of NAA molecule, where H1, H2, H3 represent the three spin systems considered in the text; H1, H2 correspond to the target singlet spin pair; (b) Simulated spectrum of NAA three-spin system with strong coupling under single-pulse excitation; (c) Simulated spectrum of NAA three-spin system with strong coupling using singlet-state preparation pulse sequence; (d) Experimental spectrum of NAA three-spin system with strong coupling under single-pulse excitation; (e) Experimental spectrum of NAA three-spin system with strong coupling using singlet-state preparation pulse sequence; (f) Simulated spectrum of NAA three-spin system with weak coupling under single-pulse excitation; (g) Simulated spectrum of NAA three-spin system with weak coupling using singlet-state preparation pulse sequence; (h) Experimental spectrum of NAA three-spin system with weak coupling under single-pulse excitation; (i) Experimental spectrum of NAA three-spin system with weak coupling using singlet-state preparation pulse sequence