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

表1 NAA中以图6(a)标记的氢原子核在两种pH条件下的化学位移值以及J耦合值（外磁场B₀=11.7 T），单位为Hz. 表中每500.17 Hz为1 ppm

Table 1 The chemical shift values and J-coupling values of the protons of NAA labelled as Fig. 6(a) under two different pH conditions. The unit is Hz, and 500.17 Hz = 1 ppm

	δ₁	δ₂	δ₃	J₁₂	J₁₃	J₂₃
pH=2.3	1430.4	1437.2	2335.6	-17.22	6.43	5.52
pH=12.3	1198.5	1295.0	2146.4	-15.70	10.03	3.86