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Structural Analysis of Ionic Liquids


Structural Analysis of Ionic Liquids

The molecular structure of a compound predetermines its properties. For instance, the physicochemical properties of ionic liquids composed of anions and cations with different structures are of great difference. Therefore, it is necessary to analyze the structure of ionic liquids, which can help us predict their macroscopic properties, and further guide us in the design and synthesis of ionic liquids with special properties and functions.

Alfa Chemistry has a highly skilled analysis team with significant experience in the chemical testing and analysis of ionic liquids. The team can provide you with services for the structural analysis of ionic liquids.

Our Analytical Techniques

Alfa Chemistry offers a variety of techniques for structural analysis of ionic liquids, including Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, nuclear magnetic resonance (NMR) spectroscopy, X-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscope (SEM), mass spectrum (MS), elemental analysis, etc. A detailed description of our commonly used techniques for characterizing the structure of ionic liquids is given below.

  • Fourier-transform infrared spectroscopy (FTIR)

Structural Analysis of Ionic Liquids

FTIR is a technique used to obtain an infrared spectrum of absorption or emission of a solid, liquid or gas. Due to the advantages of simple sample preparation, convenient and fast measurement, and the ability to reflect the microscopic information inside the solution, it is widely used in the structural analysis of ionic liquid. The frequency shift, peak intensity change and peak area change in the FTIR can reflect qualitatively or quantitatively various interaction forces and small changes in structure in ionic liquids. Furthermore, FTIR not only plays an important role in the structural exploration of pure ionic liquids, but also has an irreplaceable position in the understanding of the structure of ionic liquid mixtures [1].

  • Raman spectroscopy

Raman spectroscopy is a scattering spectrum used to analyze molecular structures. It complements the FTIR. Some vibrations that cannot be studied by FTIR can be measured by using Raman spectroscopy. The main advantage of Raman spectroscopy is the ability to provide information about the vibration peaks of the so-called "molecular fingerprint", which can reflect subtle changes in the structure of ionic liquids. Meanwhile, Raman spectroscopy can measure the vibration spectrum of many different states of the system, especially to reflect the local structural changes in ionic liquids. The main Raman spectroscopy used to study ionic liquids are Fourier transform Raman spectrometer and confocal Raman microscope.

  • Nuclear magnetic resonance spectroscopy (NMR)

Structural Analysis of Ionic Liquids

NMR has been used as an efficient characterization tool of organic compounds for several decades. It is the most powerful technique to help researchers understand the structure of ionic liquids and has rendered many unique and valuable insights on the design of ionic liquids [2]. Alfa Chemistry can provide you with a variety of NMR techniques available such as pulsed-field gradient NMR, fast-field-cycling NMR, electrophoretic NMR, and solid state NMR, to thoroughly investigate ionic liquids.

Our Advantages

Our Advantages

Our laboratory has advanced technology and equipment for structural analysis of ionic liquids.

We offer fast turnaround time and very competitive prices to clients all over the world.

Our laboratory will quickly return accurate and reliable results.

Ordering Process

Structural Analysis of Ionic Liquids

Alfa Chemistry's senior technical experts combined with a wide range of advanced analytical instrumentation helps you solve your structural analytical needs. We deliver the fast and reliable results to you within the promised time. Please do not hesitate to contact us for understanding more detailed information about our analytical services, we will answer you as soon as possible.


  • Zhang, L. Q.; Li, H. R. Progress of investigations on structures and interactions of ionic liquids by infrared spectroscopy and Raman spectroscopy. Acta Physico-Chimica Sinica. 2010, 26(11): 2877-2889.
  • Damodaran, K. Recent NMR studies of ionic liquids. Annual Reports on NMR spectroscopy. 2016, 88: 215-244.

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