Raman spectroscopic study of the Chromobacterium violaceum pigment violacein using multiwavelength excitation and DFT calculations

Description

No / Violacein is a bisindole pigment occurring as a biosynthetic product of Chromobacterium violaceum and Janthinobacterium lividum. It has some structural similarities to the cyanobacterial UV-protective pigment scytonemin, which has been the subject of comprehensive spectroscopic and structural studies. A detailed experimental Raman spectroscopic study with visible and near-infrared excitation of violacein produced by C. violaceum has been undertaken and supported using theoretical DFT calculations. Raman spectra with 514 and 785 nm excitation of cultivated cells as well as extracts and Gaussian (B3LYP/6-311++G(d,p)) calculations with proposed molecular vibrational assignments are reported here.

Links & Downloads

1. Jehlicka J, Edwards HGM, Nemec I et al (2015) Raman spectroscopic study of the Chromobacterium violaceum pigment violacein using multiwavelength excitation and DFT calculations. Spectrochimica Acta A: Molecular and Biomolecular Spectroscopy. 151: 459-467.
2. http://hdl.handle.net/10454/9363
3. https://doi.org/10.1016/j.saa.2015.06.051

Tags

Cyanobacteria

DFT calculations

Raman spectroscopy

UV protective pigment

Additional Fields

Identifer	oai:union.ndltd.org:BRADFORD/oai:bradscholars.brad.ac.uk:10454/9363
Date	January 2015
Creators	Jehlička, J., Edwards, Howell G.M., Nemec, I., Oren, A.
Source Sets	Bradford Scholars
Language	English
Detected Language	English
Type	Article, No full-text in the repository