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三自旋体系核自旋单重态的制备与单重态二维谱的实现
胡凯瑞,杨雪,黄志明,辛家祥,魏达秀*(),姚叶锋*()
Preparing Nuclear Spin Singlet State in a Three-spin System and Its Application in 2D Spectrum
Kai-rui HU,Xue YANG,Zhi-ming HUANG,Jia-xiang XIN,Da-xiu WEI*(),Ye-feng YAO*()

图4. (a) 单重态COSY脉冲序列；(b)单重态NOESY脉冲序列.t1期之前的脉冲为制备与转化单重态的脉冲OC′，这一部分脉冲具有信号选择性，之后的脉冲对应传统的COSY/NOESY脉冲序列

Fig.4. (a) Singlet-state-COSY pulse sequence; (b) Singlet-state-NOESY pulse sequence. The pulse sequence OC′$ $before t1 evolution is for preparing and transferring the singlet state, and the following pulse sequence corresponds to the traditional COSY/NOESY