A 2D NzEx-HSQC experiment 38 with 100 ms mixing time was performed for Z-G4 folded in 15 NH 4 + at pH 5.1 and 293 K. The introduction of a mixing time allowed the exchange process between the 15 NH 4 + ions in the binding sites and in solution to be observed via correlation cross-peaks in the NMR spectrum.

该谱图表明,对氨基苯甲酸乙酷分子中有五种不等性的氢 (没有考虑芳环上氢的区别)。 根据1H 的化学位移可初步确定：σ为1.3401~1.3758 的三重峰是甲考峰：4.0779的宽峰是氨上的两个氢，峰形表明这两个氢是活泼氢;4.2865-4.3399的四重峰是亚甲基峰-5.5152--6. 6505.及7.8384--7,8727 的多重峰是苯环上四个氢的峰。 2：13C-NMR谱. 碳谱能镦感地反映碳核所处化学环境的细微差别。 该谱图表明：对氨基苯甲酸乙酯分子中有七种不等性的碳核。

在核磁共振（NMR）技术中，HSQC（Heteronuclear Single Quantum Coherence，异核单量子相关谱）和HMBC（Heteronuclear Multiple Bond Correlation，异核多键相关谱）是两种常用的二维谱图方法，它们主要用于确定有机分子中碳原子和氢原子之间的关联，从而帮助解析分子结构。

2021年5月26日 · Here we report the first observation of extremely long-lived K + and NH 4+ ions, with an exchange time constant on the order of an hour, when coordinated at the center of a left-handed G-quadruplex DNA.

Figure S6. 2D NzEx-HSQC 6 spectrum recorded with a 100 ms mixing time at pH = 5.1 and 293 K. Bulk, outer and inner 15NH4+ ion peaks are appropriately annotated. The cross-peaks between the outer and bulk ions are shown, with a dashed red line connecting them.

2021年3月12日 · 本文基于量子力学原理对HSQC实验进行数学建模，通过理论推导、数值计算求解自旋1/2的IS双核体系在每个脉冲节点作用后的密度矩阵，然后结合二维NMR信号采样方法，使用计算机程序完成了该体系HSQC谱图的模拟，同时，还实现了乙醇分子的HSQC谱图模拟。 HSQC实验的成功模拟基于对复杂演化过程的精确计算，可用于预测谱图以及实验参数改变对NMR谱图的影响，指导高质量HSQC实验谱图的采集。 核磁共振（NMR）波谱是解析物质结 …

多糖的结构解析中，HSQC二维核磁是开展糖苷键连接确认的基础谱图。 从有机物的HSQC解谱而言，代表的相连接的C-H相关，比如乙醇CH3-CH2-OH，其HSQC谱图中，甲基的质子和甲基碳有相交叉的信号，而亚甲基质子和亚甲基…

2021年7月7日 · 按照以下四步进行操作尝试：1.再进一个氢谱2.调取现有hsqc模板，直接文件夹copy，在topspin里再打开对应模板改参数即可，3.在acqur里调节SW和O2P，4.rga；zg（如果是新样品的话，一般是直接在icon里提交一个hsqc。

The heteronuclear single quantum coherence or heteronuclear single quantum correlation experiment, normally abbreviated as HSQC, is used frequently in NMR spectroscopy of organic molecules and is of particular significance in the field of protein NMR. The experiment was first described by Geoffrey Bodenhausen and D. J. Ruben in 1980. [1]

A 2D NzEx-HSQC experiment 38 with 100 ms mixing time was performed for Z-G4 folded in 15 NH 4 + at pH 5.1 and 293 K. The introduction of a mixing time allowed the exchange process between the 15 NH 4 + ions in the binding sites and in solution to be observed via correlation cross-peaks in the NMR spectrum.