The relevant experiment phenomena of intermolecular multiple-quantum coherence（iMQC） in highly polarized spin systems were briefly described in this paper.Dipolar effects in CRAZED and COSY（gCOSY） experiments at different temperature,different gradient strength were also discussed in detail.Experimental results suggest that factors including gradient,dipolar field,and molecular diffusion can affect iMQC signal.%文章简单描述了高极化核自旋体系中分子间多量子相干（iMQC）有关的实验现象,详细讨论了在不同温度和不同梯度场强度下CRAZED和COSY（gCOSY）实验中的偶极场效应,实验结果表明梯度场、偶极场、分子自扩散等各种因素都会影响iMQC信号。
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