烯烃 (C=C) — FTIR 吸收峰及归属

快速答案

烯烃 (C=C)通常通过寻找重复出现的特征峰簇而非某个确切的教科书数值来归属。下表按累积证据排名，展示了文献中最常将此基团置于FTIR中的位置。

烯烃 (C=C) 的特征 FTIR 峰

Showing the 30 best-supported peaks of 801 total for 烯烃 (C=C).

光谱逻辑

当多个预期谱带同时出现时，官能团归属变得更加可靠。使用此页面找到最受支持的峰，然后确认同一样品表现出连贯的模式而非孤立的单个命中。

实际应用

这些页面适用于未知材料分析、报告中的峰解释、聚合物故障排除以及验证候选材料类别是否化学上合理。

常见错误

• 仅使用一个功能基团页面作为完整的材料判定，而不检查光谱的其余部分。
• 假设最强谱带总是最具诊断性的。
• 忘记加工、添加剂、老化和混合物会移动或展宽预期峰。

验证建议

当几种材料类别共享相似谱带或混合物效应使FTIR归属不确定时，请使用DSC、GC-MS或TGA。

这些分配背后的文献

• 968 cm⁻¹ 置信度 1.0

  “并通过傅里叶变换红外 (FTIR) 光谱在 400-4000 cm-1 中红外区域进行定量。FTIR 分析显示，两种油提取物（加热和不加热）在 968 处呈现一个明确的峰，代表双键”

  Analysis of trans fatty acids production and squalene variation during amaranth oil extraction DOI: 10.2478/s11532-012-0104-4
• 1535 cm⁻¹ 置信度 1.0

  “As observed in the MWCNTs sample, a typical signal at 1535 shows the cm-1 C=C vibration of structural aromatic.”

  Synthesis and Physical Properties Characterization of Montmorillonite-modified Carbon Nanotubes Filler DOI: 10.1088/1757-899X/546/4/042004
• 1643 cm⁻¹ 置信度 1.0

  “cm-1处1705.1的峰表示存在cm-1 -C=O键，同时在1643.4处有中等强度的吸收，表明存在C=C。”

  Grafting of Oleic Acid On Cyclic Natural Rubber Resiprene-35 Using Dicumyl Peroxide Initiator and Divinylbenzene Compatibilizers For Paint Binder In Polyamide Thermoplastics DOI: 10.13005/ojc/350119
• 1645 cm⁻¹ 置信度 1.0

  “The small peak at 1645 is attributed to the stretching vibration of C=C [48], which becomes gradually stronger by increasing content of VMSG.”

  Novel Silica Functionalized Monosodium Glutamate/PVA Cross-linked Membranes for Alkali Recovery by Diffusion Dialysis DOI: 10.21203/rs.3.rs-283846/v1
• 1634 cm⁻¹ 置信度 1.0

  “LLM确认的规则峰组候选”

  Modified Dioscorea hispida starch-based hydrogels and their in-vitro cytotoxicity study on small intestine cell line (FHS-74 Int) DOI: 10.1016/j.ijbiomac.2017.10.125
• 1634 cm⁻¹ 置信度 1.0

  “35 36 cm-1 在1634和1613处的双弱吸收带来自C=C伸缩振动，而2847和2940处的吸光度归因于脂肪族C-H基团的伸缩振动。”

  Electrosprayed PMMA microcapsules containing green soybean oil-based acrylated epoxy and a thiol: a novel resin for smart self-healing coatings DOI: 10.1088/1361-665X/ab9754
• 1578 cm⁻¹ 置信度 1.0

  “2 (bottom) cm-1, bands were located at 1578 that the highest signal-to-noise ratio was found for a resulting from the cm-1, nominal resolution of 4 C=C stretching in chloroalkenes, at 1541, 1394, 1273 which also provided the cm-1,”

  Determination of iprodione in agrochemicals by infrared and Raman spectrometry DOI: 10.1007/s00216-007-1152-z
• 3275 cm⁻¹ 置信度 1.0

  “在3275.13和1635.54处的两个显著峰分别代表了胺中N-H键、烯烃中C=C伸缩或酰胺中C=O伸缩的典型特征 [42]。”

  Biomedical Applications of Cocoa Bean Extract-Mediated Silver Nanoparticles as Antimicrobial, Larvicidal and Anticoagulant Agents DOI: 10.1007/s10876-016-1055-2