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Two-Dimensional (2D) NMR: Overview

Two-Dimensional (2D) NMR: Overview

The 1D NMR spectrum of large and complex molecules like natural products has complicated splitting patterns and overlapping signals, which can be easily interpreted using 2-dimensional (2D) NMR. Unlike 1D NMR, 2D NMR has two frequency axes that provide the coupling information between the nucleus A and nucleus B in a molecule. The process from which 2D spectra are obtained has four steps.
The first step is the preparation period, during which nucleus A is excited with a radiofrequency pulse....

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Related Experiment Video

Updated: Jul 19, 2025

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations

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Phase Engineering and Synchrotron-Based Study on Two-Dimensional Energy Nanomaterials.

Qun He¹, Beibei Sheng¹, Kefu Zhu¹

¹National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230029, China.

Chemical Reviews

|August 15, 2023

Summary

This summary is machine-generated.

This review highlights phase engineering in two-dimensional (2D) nanomaterials for energy applications. Synchrotron radiation techniques are crucial for analyzing defects, doping, and interfaces in these advanced materials.

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Area of Science:

Materials Science
Nanotechnology
Energy Science

Background:

Two-dimensional (2D) nanomaterials exhibit unique properties for energy applications, driven by their phase structures.
Developing these materials requires advanced characterization methods to understand their phase structures and reaction mechanisms.

Purpose of the Study:

To provide a comprehensive review of phase engineering in 2D nanomaterials.
To emphasize the role of synchrotron radiation characterizations in analyzing these materials.
To discuss applications in energy-related fields.

Main Methods:

Review of phase engineering strategies for 2D nanomaterials.
Focus on characterization using synchrotron radiation techniques.
Inclusion of in situ methods to study structural evolution.

Main Results:

Detailed analysis of intrinsic defects, atomic doping, intercalation, and heterogeneous interfaces in 2D nanomaterials.
Emphasis on synchrotron-based spectroscopic techniques for phase and structure determination.
Insights into structural dynamics under working conditions via in situ studies.

Conclusions:

Synchrotron radiation is vital for understanding phase engineering in 2D nanomaterials for energy applications.
In situ studies offer deep insights into material behavior.
Future research should focus on advanced synchrotron sources and integrated techniques.