The course introduces the three key spectroscopic methods used by chemists and biochemists to analyse the molecular and electronic structure of atoms and molecules. These are UV/Visible , Infra-red (IR) and Nuclear Magnetic Resonance (NMR) spectroscopies. The content is presented using short focussed and interactive screencast presentations accompanied by formative quizzes to probe understanding of the key concepts presented. Numerous exercises are provided to facilitate mastery of each topic. A unique virtual spectroscopic laboratory is made available to enable students to measure and analyse spectra online. Assessment is via summative quizzes completed during the course period.
Introduction to Molecular Spectroscopy
oferecido por
Universidade de Manchester
Programa - O que você aprenderá com este curso
Semana
1Ultraviolet and Visible Spectroscopy
In this first week we introduce the electromagnetic spectrum and the origin of transitions giving rise to ultraviolet and visible (UV/Vis) spectra. You will learn that electronic transitions are caused by absorption of radiation in the UV/Vis region of the electromagnetic spectrum. The reason for the wavelength and intensity of bands will be described and the colour origin of certain compounds will be discussed. You will also be shown how UV/Vis spectroscopy is performed and you will be able to run and analyse your own spectra. As the final activity in this module you are given a link to view how to obtain a UV/Visible spectrum in the laboratory. Good luck, try and participate in the discussion forums to enhance your learning and don't forget to complete the end of week laboratory quiz which contributes to your final mark.
10 vídeos (total de (Total 89 mín.) min), 7 leituras, 2 testes
10 videos
Introduction1min
What is spectroscopy?9min
The nature and properties of electromagnetic radiation6min
Example of energy calculation10min
Energy levels: Molecular Orbital Theory - revision11min
Molecular Orbital diagram for CO5min
UV/Visible spectroscopy10min
Example of Beer-Lambert calculation8min
Transitions relevant to UV/Vis Spectroscopy15min
Effect of conjugation on wavelength8min
7 leituras
Guidance for studying the course10min
ACKNOWLEDGEMENTS10min
Pre-course survey5min
Week 1 Lecture Notes10min
Lab 1 Introduction10min
How to obtain a UV/Vis spectrum10min
Run a UV/Visible spectrum10min
2 exercícios práticos
Week 128min
UV/Vis laboratory quiz4min
Semana
2Infrared Spectroscopy
In this module we introduce the theory underpinning infrared (IR) spectroscopy and show examples of analysis using the technique. Transitions between the vibrational energy levels of molecules occurs in the infrared region of the electromagnetic spectrum. We start with the theory underlying vibration using the simple harmonic oscillator model. Analysis of more complex molecules is introduced using group frequencies and number of vibrational modes. You will also be shown how to obtain an infrared spectrum and will have an opportunity to run your own spectrum. At the end of this module you are given a link to view how to obtain an infra red spectrum in the laboratory. Don't forget to complete the end of week laboratory quiz which contributes to your final mark for this course.
6 vídeos (total de (Total 72 mín.) min), 4 leituras, 2 testes
6 videos
Vibrational frequency12min
Example vibrational frequency calculation10min
Energy levels and dipoles14min
Vibrational modes9min
Example IR spectra of organic molecules12min
4 leituras
Week 2 Lecture Notes10min
Lab 2 Introduction10min
How to obtain an infra red spectrum10min
Run an infra red spectrum10min
2 exercícios práticos
Week 220min
IR Lab Quiz4min
Semana
3Nuclear Magnetic Resonance (NMR) Spectroscopy
This week we concentrate on Nuclear Magnetic Resonance (NMR) spectroscopy. Here a magnetic field is used to create energy levels for magnetic nuclei present in a molecule. Transition between these energy levels occurs in the radiofrequency region of the electromagnetic spectrum. The positions of the bands in the observed spectrum is dependent on the shielding of the nuclei by the local electronic structure, giving rise to a parameter known as chemical shift. Bands also display fine structure caused by spin-spin coupling with neighbouring nuclei. Examples on the analysis of NMR spectra for structure determination will be given. As the final activity in this module you are given a link to view how to obtain an NMR spectrum in the laboratory. Don't forget to compete this end of week laboratory quiz which contributes to your final mark.
9 vídeos (total de (Total 114 mín.) min), 4 leituras, 2 testes
9 videos
Nuclear spin in an external magnetic field10min
Spin and magnetisation13min
Chemical shift18min
More on chemical shift19min
Analysis of proton spectra5min
Spin-spin coupling6min
Spin-spin coupling mechanism18min
Carbon-13 NMR and pulsed methods10min
4 leituras
Week 3 Lecture Notes10min
Lab 3 Introduction10min
How to obtain an NMR spectrum10min
Run an NMR spectrum10min
2 exercícios práticos
Week 320min
NMR lab quiz4min
Semana
4Final Assessment
1 teste
1 exercício prático
Week 4 Quizs
17%
comecei uma nova carreira após concluir estes cursos
11%
consegui um benefício significativo de carreira com este curso
Melhores avaliações
por ES•Apr 3rd 2018
Excellent material and pace. Assignments were challenging but could be completed from the lecture material alone. Overall a great experience.
por JL•Aug 26th 2018
Very recommended to every person who wants to understand the basic ideas, concepts and calculations of current spectroscopic techniques.
Instrutores
Patrick J O'Malley, D.Sc
ReaderChemistry
Sobre Universidade de Manchester
Tracing its roots back to 1824, the University of Manchester is home to almost 40,000 students. The University has three Nobel laureates among its current staff – more than any other British university - and a total of 25 Nobel laureates have come from our past and present students and staff. We have three main goals: to undertake world-class research; to deliver an outstanding learning and student experience; and to be socially responsible.
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