Transcription of ULTRAVIOLET AND VISIBLE SPECTROSCOPY
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ULTRAVIOLET AND VISIBLE SPECTROSCOPY
ORGANIC CHEMISTRY SPECTROSCOPY of Organic Compounds Prof. Subodh Kumar Dept. of Chemistry Guru Nanak Dev University Amritsar -143005 ( ) CONTENTS IntroductionUltraviolet and VISIBLE SpectroscopyNature of Electronic TransitionsPrinciples of absorption SPECTROSCOPY Spectral MeasurementsSolvent EffectsApplications of Electron SPECTROSCOPY Commercial Applications of UV and VISIBLE SpectroscopyInfrared absorption SpectroscopyHooke s law and absorption of RadiationsModes of Molecular VibrationsOther Factors influencing Vibrational FrequenciesSample PreparationCharacteristic Group Vibrations of Organic Molecules 1 Introduction The molecular SPECTROSCOPY is the study of the interaction of electromagnetic waves and matter. The scattering of sun s rays by raindrops to produce a rainbow and appearance of a colorful spectrum when a narrow beam of sunlight is passed through a triangular glass prism are the simple examples where white light is separated into the VISIBLE spectrum of primary colors.
Ultraviolet and Visible Spectroscopy This absorption spectroscopy uses electromagnetic radiations between 190 nm to 800 nm and is divided into the ultraviolet (UV, 190-400 nm) and visible (VIS, 400-800 nm) regions. Since the absorption of ultraviolet or visible radiation by a molecule leads transition among electronic
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