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Updated: May 6, 2026

Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
Non linear optical analyses of hexamine: phenol cocrystals based on hydrogen bonding: a comparative study
S Vijayalakshmi1, S Kalyanaraman1
1PG & Research Department of Physics, Sri Paramakalyani College, Alwarkurichi 627412, India.
This study investigates hydrogen bonding in novel cocrystals using spectroscopy. The findings reveal insights into non-linear optical properties and optical quality for potential applications.
Area of Science:
- Solid-state chemistry
- Spectroscopy
- Materials science
Background:
- Hydrogen bonding plays a crucial role in determining the properties of molecular crystals.
- Understanding cocrystal formation is key to designing materials with specific optical characteristics.
Purpose of the Study:
- To elucidate the nature of hydrogen bonding in 4,4'thiodiphenol: hexamine and 4,4'sulfonyldiphenol: hexamine cocrystals.
- To investigate the relationship between hydrogen bonding, crystal structure, and second harmonic generation (SHG) efficiency.
- To assess the optical quality of the synthesized cocrystals.
Main Methods:
- Fourier-Transform Infrared (FT-IR) spectroscopy and Raman spectroscopy were used to analyze vibrational modes.
- Factor group analysis was employed to predict internal and external vibrational modes.
- UV-Vis spectroscopy was utilized to determine optical quality.
- The Kurtz-Perry method was applied to measure second harmonic generation (SHG) efficiency.
Main Results:
- Detailed analysis of conventional and unconventional hydrogen bonding interactions was performed.
- The influence of intramolecular charge transfer (ICT) on non-centrosymmetric structures and potential SHG was discussed.
- Intense low-wavenumber Raman vibrations, attributed to electron-phonon coupling, were analyzed.
- UV-Vis analysis confirmed the optical quality of the adducts.
Conclusions:
- The study provides a comprehensive understanding of hydrogen bonding in the studied cocrystals.
- The research highlights the link between crystal structure, hydrogen bonding, and second harmonic generation properties.
- The findings contribute to the development of new materials with non-linear optical functionalities.
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