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IR Spectroscopy 紅外色譜學

Salesians of Don Bosco Ng Siu Mui Secondary School. 天主教慈幼會伍少梅中學. IR Spectroscopy 紅外色譜學. Wu L.M. http://walk.to/wu. 簡介內容. HKAL 要求 儀器的簡單認識 簡單介紹理論 實驗過程 基本圖譜認識 譜峰認識及練習 ( 下一堂：* 請預備胡老師手冊 * 完成手冊習作 ).

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IR Spectroscopy 紅外色譜學

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  1. Salesians of Don Bosco Ng Siu Mui Secondary School 天主教慈幼會伍少梅中學 IR Spectroscopy 紅外色譜學 Wu L.M. http://walk.to/wu

  2. 簡介內容 • HKAL要求 • 儀器的簡單認識 • 簡單介紹理論 • 實驗過程 • 基本圖譜認識 • 譜峰認識及練習 (下一堂：* 請預備胡老師手冊 * 完成手冊習作)

  3. HKAL課程中對紅外色譜學的要求Syllabus: Instrumentation Analysis • An awareness that spectroscopic methods such as infra-red spectroscopy and nuclear magnetic resonance (NMR) can provide information about the structure of a molecule.

  4. nuclearmagnetic resonance (NMR) • NMR spectroscopy typically gives the hydrocarbon fragments

  5. infra-red spectroscopy • the most useful information obtained from an IR spectrum is what functional groups are present within the molecule

  6. Topic: Use of infra-red (IR) spectrum in the identification of functional groups • IR spectrum and its use in the identification of the following groups: C-H O-H N-H C=C C≡C C=O and C ≡ N (Instrumentation is not required)

  7. Suggested Experiments / Activities • Inspection of IR spectrum of organic compounds.

  8. 紅外線化學儀器IR Spectroscopy Instrument 伍少梅紅外線化學分析網頁 http://hk.geocities.com/tempalbum/

  9. 7 IR Characteristic peaks • 7 vibrational movement (covalent bond )共價鍵 • 7個主要官能基 • 分子的指紋(peak)

  10. IR spectrum analysis • 紅外光譜術(infrared spectroscopy)是用來偵測分子的振動能量(或頻率)的技術 • 鍵長 • 鍵角 • 精確地預測分子振動頻率

  11. 震動方法

  12. 官能基 譜峰位置 / cm-1 Alkane, C–H 2850–2960 Alkene, =C–H 3020–3100 Alkene, C=C 1650–1670 Alkyne, ≡C–H 3300 Alkyne, –C≡C–2100–2260 Alcohol, O–H 3400–3640 Alcohol, C–O 1050–1150 Carboxylic, O–H 2250-3100 Amine, N–H 3310–3500 Amine, C–N 1030, 1230 Carbonyl, C=O 1670–1780Nitrile, C≡N 2210–2260

  13. Characteristic Infra-red Absorption Wave number Ranges(Stretching modes)HKAL

  14. IR spectrum

  15. IR Real Spectrum

  16. IR Spectroscopy Experiment 實驗過程短片 香港科技大學

  17. Learning time………. Are you read to examine some IR Spectrum?

  18. Alkane C-H：2840-3095

  19. Alkene =C-H：3020-3100 C=C：1610-1680

  20. Alkynes C ≡ C：2100-2260 ≡C-H：3300

  21. Alcohol O-H：3400-3640

  22. Alkanoic acid O-H：2250-3100

  23. Amine N-H：3310-3500

  24. Ketone C=O：1670-1780

  25. Aldehyde C=O：1670-1780

  26. Nitrile CN C≡N：2200-2260

  27. Test time………. Are you read to identify one unknown IR Spectrum?

  28. Ester Quick Test C=O：1670-1780 C-H：2840-3095

  29. 自學網頁 • 胡老師網頁 及 其他參考網頁 • http://walk.to/wu • http://hk.geocities.com/tempalbum/ • http://orgchem.colorado.edu/hndbksupport/irtutor/tutorial.html • http://www.hkedcity.net/resources/ires/ires_browse.phtml?res_cat_id=2870 • http://www.chem.ucalgary.ca/courses/351/Carey/Ch13/ch13-ir-1.html • http://www.cofc.edu/~chem/organic/Slides/IR2c/sld019.htm 拜拜！

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