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$Synthesis and Microdiffraction at Extreme Pressures and Temperatures$

Synthesis and Microdiffraction at Extreme Pressures and Temperatures

Published on: October 7, 2013

High pressures studies on bis(L-alaninate)copper(II) by Raman spectroscopy and synchrotron X-ray diffraction.

R C de Oliveira¹, A J Barros², G A Calligaris³

¹Institute of Exact and Naturals Sciences, Federal University of Pará, 66075-110 Belém, PA, Brazil; College of Application (CAp), Federal University of Roraima, 69310-000 Boa Vista, RR, Brazil.

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy

|April 30, 2024

Summary

This summary is machine-generated.

Bis(L-alaninate)copper(II) maintains monoclinic symmetry under high pressure. Raman spectroscopy and X-ray diffraction reveal molecular fragment rotations and bond length changes, indicating structural adaptability.

Keywords:

Bis(L-alaninate)copper(II)High pressures Metal-complexed amino acids Raman spectroscopy Synchrotron radiation X-ray diffraction

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Area of Science:

Materials Science
Solid-State Chemistry
Crystallography

Background:

Understanding the high-pressure behavior of metal-organic compounds is crucial for materials science.
Bis(L-alaninate)copper(II) is a coordination complex with potential applications influenced by its structural stability.

Purpose of the Study:

To investigate the vibrational and structural response of bis(L-alaninate)copper(II) under hydrostatic pressure.
To determine the stability limits and phase transitions of the crystal up to 20.1 GPa.

Main Methods:

Raman spectroscopy was employed to analyze changes in vibrational modes.
Synchrotron X-ray diffraction and Le Bail fits were used to determine lattice parameters and structural evolution.
Studies were conducted as a function of hydrostatic pressure from 0 to 20.1 GPa.

Main Results:

Raman spectra showed alterations in vibrational modes linked to copper-containing units, suggesting rotations and bond length discontinuities.
Lattice parameters, particularly the angular parameter beta, exhibited changes correlating with Raman spectral shifts.
The crystal structure remained monoclinic throughout the studied pressure range (0-20.1 GPa).

Conclusions:

Bis(L-alaninate)copper(II) demonstrates significant structural adaptability under high hydrostatic pressure.
Observed changes are attributed to molecular fragment rotations and internal bond deformations, without symmetry loss.
The compound exhibits considerable stability within the investigated high-pressure regime.