Ultraviolet and Visible Spectrometry: Structural Applications and Solvent Effects

  • Nafeesa Mustaan Baqai Medical University, Karachi-74600
  • Sofia Ahmed Baqai Medical University, Karachi-74600
  • Muhammad Ali Sheraz Baqai Medical University, Karachi-74600
  • Syeda Ayesha Ahmed Un Nabi Baqai Medical University, Karachi-74600
  • Iqbal Ahmad Baqai Medical University, Karachi-74600
Keywords: Solvents effects, Absorption spectra, solvatochromism, chromophore

Abstract

Ultraviolet and visible (UV-vis) spectrometry is routinely used for the quantitative determination of different analytes, such as drug compounds, highly conjugated organic compounds, and biological macromolecules. Spectroscopic analysis is commonly carried out in solutions but solids and gases may also be studied. UV-vis absorption band positions, intensity and shape of solvent-sensitive molecules show changes in solvents of varying polarity. In this article a general overview of recent progress in the field of solvent effects on the electronic absorption spectra of a variety of molecules is presented. Moreover, the behavior of various compounds in different solvents and the effects of these solvents on the intramolecular charge transfer bands have been discussed using various solvent parameters such as solvatochromic behavior i.e. hypsochromic or bathochromic shifts in wavelength of maximum absorption, solute-solvent interactions and dielectric constant effects.

Author Biographies

Nafeesa Mustaan, Baqai Medical University, Karachi-74600

Baqai Institute of Pharmaceutical Sciences

Sofia Ahmed, Baqai Medical University, Karachi-74600

Baqai Institute of Pharmaceutical Sciences

Muhammad Ali Sheraz, Baqai Medical University, Karachi-74600

Baqai Institute of Pharmaceutical Sciences

Syeda Ayesha Ahmed Un Nabi, Baqai Medical University, Karachi-74600

Baqai Institute of Pharmaceutical Sciences

Iqbal Ahmad, Baqai Medical University, Karachi-74600

Baqai Institute of Pharmaceutical Sciences

Published
2017-05-02