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*()
),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*()
),Ye-feng YAO*()
图6. (a) 核自旋Ha、Ha′单重态的TS衰减曲线，TS=4.81±0.23 s；(b)核自旋Ha、Ha′的T1衰减曲线，T1=0.73±0.03 s；(c)核自旋单重态的1H NMR实验谱（样品的pH=2.3），单重态的制备与转化过程中，梯度场与CW脉冲具有选择性滤波的效果，谱图中Ha、Ha′的信号被保留，其余信号被压制
Fig.6. (a) The TS decay curve of the singlet state of Ha, Ha′ in NAA, TS=4.81±0.23 s; (b) The T1 decay curve of Ha、Ha′ in NAA, T1=0.73±0.03 s; (c) Experimental 1D NMR spectrum (the sample pH=2.3) of the nuclear spin singlet state. The gradient pulse and CW pulse have the effect of signal selection. The signals of Ha and Ha′ are reserved, while the other signals are suppressed
