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UVRR spectroscopic studies of valinomycin complex formation in different solvents

Ozdemir, A and Lednev, IK and Asher, SA (2005) UVRR spectroscopic studies of valinomycin complex formation in different solvents. Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 61 (1-2). 19 - 26. ISSN 1386-1425

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Abstract

We investigated the complexation of valinomycin (VM) in different solvent environments with the aid of the UVRR spectroscopy. By probing the 206.5 and 229 nm excited Raman spectra, we showed that new bands are observed around 1700 and 1290cm-1. We assigned the 1700 cm-1 band to the hydrogen bonded ester carbonyl stretching vibration. In a polar solvent, VM-K+ complexation shows significant intensity changes in amide and ester carbonyl stretching region. Because of the small amount of conformational interconversion, complexation has a negligible effect on other band intensities including, the amide III, CαH, and amide II. We also showed the effects of the solvent polarity on the solution conformation of VM. © 2004 Elsevier B.V. All rights reserved.


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Details

Item Type: Article
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Ozdemir, A
Lednev, IK
Asher, SAasher@pitt.eduASHER
Date: 1 January 2005
Date Type: Publication
Journal or Publication Title: Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume: 61
Number: 1-2
Page Range: 19 - 26
DOI or Unique Handle: 10.1016/j.saa.2004.03.006
Schools and Programs: Dietrich School of Arts and Sciences > Chemistry
Refereed: Yes
ISSN: 1386-1425
MeSH Headings: Deuterium; Hydrogen Bonding; Solvents--chemistry; Spectrum Analysis, Raman; Valinomycin--chemistry
PubMed ID: 15556416
Date Deposited: 08 Feb 2013 21:20
Last Modified: 16 Feb 2019 15:55
URI: http://d-scholarship.pitt.edu/id/eprint/17180

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