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20页PPT让你完全搞懂红外光谱官能团识别!

  • 2026-11-09 12:01:08
20页PPT让你完全搞懂红外光谱官能团识别!

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红外光谱是有机结构鉴定的核心手段，特征区（4000-1330 cm⁻¹）是基团鉴定核心区域，指纹区（1330-400 cm⁻¹）则用于区分结构相似化合物。红外光谱的特征区（4000-1330 cm⁻¹）主要对应于X-H（如O-H、N-H、C-H）及三键、双键等官能团的伸缩振动，这些振动频率受分子环境影响较小，具有明显的特征性，因此是鉴别化合物含有什么官能团的核心依据。如何快速识别红外光谱中官能团，请各位看官老爷们跟着PPT一起往下看。
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【跟我学Excel VBA】第八课:动态模糊查找,亮瞎你的双眼

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  1. CONNECT:[ UseTime:0.000657s ] mysql:host=172.18.0.4;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001010s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000461s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000387s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000598s ]
  6. SELECT * FROM `set` [ RunTime:0.000290s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000656s ]
  8. SELECT * FROM `article` WHERE `id` = 487280 LIMIT 1 [ RunTime:0.000415s ]
  9. UPDATE `article` SET `lasttime` = 1794416168 WHERE `id` = 487280 [ RunTime:0.001561s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000367s ]
  11. SELECT * FROM `article` WHERE `id` < 487280 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000424s ]
  12. SELECT * FROM `article` WHERE `id` > 487280 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000349s ]
  13. SELECT * FROM `article` WHERE `id` < 487280 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000547s ]
  14. SELECT * FROM `article` WHERE `id` < 487280 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000518s ]
  15. SELECT * FROM `article` WHERE `id` < 487280 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000689s ]
0.091839s