Transoid and Cisoid Dienes with substituents highlighted in red.
Ultraviolet-Visible (UV-Vis) Spectroscopy – Woodward-Fieser Rules to Calculate Wavelength of Maximum Absorption (Lambda-max) of Conjugated Dienes and Polyenes
Figure A: Shows the difference in deviations in absorbance when values are obtained at maximum wavelength of absorbance (band A) vs other wavelengths of absorbance (band B). Figure B: shows the deviations in Beer-Lambert law due to observations made at wavelengths other than lambda max.
Ultraviolet-Visible (UV-Vis) Spectroscopy – Limitations and Deviations of Beer-Lambert Law
A diagrammatic representation of the hypothetical situation to derive the Beer-Lambert law containing a sample of path length b through which monochromatic light is passed.
Ultraviolet-Visible (UV-Vis) Spectroscopy – Derivation of Beer-Lambert Law
Indole containing vinca alkaloids - Vinblastine, vincristine and vindoline.
Pharmacognosy of Vinca Alkaloids (Periwinkle)
Ergotamine - An indole alkaloid obtained from the Ergot
Pharmacognosy of Ergot (Argot or St. Anthony’s Fire)
Different transitions between the bonding and anti-bonding electronic states when light energy is absorbed in UV-Visible Spectroscopy.
Ultraviolet-Visible (UV-Vis) Spectroscopy – Principle
Figure 1: Structure Activity Relationship (SAR) of Second Generation Matrix Metalloproteinase Inhibitors (MMP Inhibitors)
Matrix Metalloproteinases: Its Implications in Cardiovascular Disorders
The Visible Spectrum with VIBGYOR (Violet, Indigo, Blue, Green, Yellow, Orange, Red)