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所在平台: Coursera |
课程主页: https://www.coursera.org/learn/spectroscopy
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课程名称：分子光谱学导论 概述：本课程介绍了化学家和生物化学家用于分析原子和分子的分子及电子结构的三种主要光谱方法：紫外/可见光光谱（UV/Vis）、红外光谱（IR）和核磁共振光谱（NMR）。课程内容通过简短的重点互动录播演示呈现，并配有形成性测验，以探测对关键概念的理解。课程中提供了大量练习，帮助学生掌握每个主题。课程还提供独特的虚拟光谱实验室，使学生能够在线测量和分析光谱。评估通过课程期间完成的总结性测验进行。 课程大纲： 1. 紫外和可见光光谱：本周我们介绍电磁谱及导致紫外和可见光光谱的跃迁的来源。您将了解到电子跃迁是通过吸收电磁谱中紫外/可见光区域的辐射引起的。课程将描述光谱带的波长和强度原因，并讨论某些化合物的颜色起源。此外，您将学习如何进行紫外/可见光光谱实验，并能够运行和分析自己的光谱。最后，课程提供链接以观看如何在实验室中获得紫外/可见光光谱。祝您好运，积极参与讨论论坛以增强学习，并别忘了完成期末实验室测验，这将计入您的最终成绩。 2. 红外光谱：本模块介绍红外光谱（IR）的理论基础，并展示使用该技术的分析示例。分子间的振动能级跃迁发生在电磁谱的红外区域。我们将从简单谐振子模型开始，介绍振动理论，随后通过群频和振动模式数量对更复杂分子的分析进行探讨。您还将学习如何获取红外光谱，并有机会运行自己的光谱。模块最后提供链接以观看如何在实验室中获得红外光谱。不要忘记完成本周的实验室测验，以便为您的课程最终成绩加分。 3. 核磁共振(NMR)光谱：这一周我们专注于核磁共振光谱（NMR）。在这里，利用磁场为分子中存在的磁性核创建能级，跃迁发生在电磁谱的射频区域。观察到的光谱中带的位置取决于局部电子结构对核的屏蔽效应，产生了称为化学位移的参数。带也显示出由于与邻近核的自旋-自旋耦合所产生的细结构。本模块将提供NMR谱分析的结构确定示例。最后，课程提供链接以观看如何在实验室中获取NMR光谱。别忘了完成这周的实验室测验，它将计入您的最终成绩。 4. 期末评估：课程结束时将进行期末评估。
Name:Ultraviolet and Visible Spectroscopy
Description: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.
Name:Infrared Spectroscopy
Description: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.
Name:Nuclear Magnetic Resonance (NMR) Spectroscopy
Description: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.
Name:Final Assessment
Description:
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.
