What absorbs at 1900 cm⁻¹ in an FTIR spectrum?

クイックアンサー

A band near 1900 cm⁻¹ is usually interpreted by checking which functional groups repeatedly co-occur there in the literature, then confirming at least one or two additional peaks in the same sample. This page ranks those assignments by accumulated evidence rather than by a single fixed textbook rule.

可能性のある官能基アサイン

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可能性のある材料

同じ文献プールがこのバンドと少なくとも1つの追加の特性ピークをサポートする場合にのみ、材料が表示されます。

スペクトルロジック

This band becomes meaningful only when read with its neighboring peaks. In practice, analysts first look at the assignments above, then check whether the same sample also shows other peaks expected for the same structural motif. A lone band near 1900 cm⁻¹ is usually not enough for material identification by itself.

実使用例

この種のクエリは、ポリマー識別、未知のプラスチックスクリーニング、QCトラブルシューティング、リサイクル材料の検証、および文献に基づいたピーク帰属のレビューで一般的です。

よくある間違い

• 少なくとも1～2つの支持ピークを確認せずに、1つの孤立したバンドを材料の証拠として扱うこと。
• 重複を無視: 複数の官能基が同じ波数付近に寄与することがあります。
• 添加剤、ブレンド、酸化、または汚染がスペクトルを歪める可能性がある場合に検証を省略すること。

検証アドバイス

曖昧さが残る場合は、特にブレンド、劣化サンプル、充填ポリマーについて、DSC、GC-MS、またはTGAで仮説を検証してください。

これらのアサインの根拠となる文献

• N-O bond 信頼度 1.0

  “Taking into - account the results on CO adsorption and literature data [69-74], 1770cm(cid:2)1 Cr3+(NO) are assigned to the bands at 1900 and”

  Influence of dealumination and treatments on the chromium speciation in zeolite CrBEA DOI: 10.1016/j.micromeso.2009.04.038
• Water (H2O) 信頼度 1.0

  “The most striking feature in the infrared cm(cid:3)1, the oxalic acid dihydrates and the perfluorocarboxylic acid monospectrum of OXAD is the rather strong absorption near 1900 OAH(cid:1)(cid:1)(cid:1)O hydrates in the regions characteristi”

  Infrared spectra of hydrogen bond network in lamellar perfluorocarboxylic acid monohydrates DOI: 10.1016/j.saa.2021.119551
• Adsorbed carbon monoxide 信頼度 1.0

  “However, assignment to ketene cannot and Possible Photoproducts be unequivocal in this spectral region, since carbon monoxide frequencies.27 also absorbs at the same cm-1 The absorptions above 1900 are characteristic of”

  Jarmelo 等 - 2008 - Matrix-Isolated Diglycolic Anhydride Vibrational DOI: 10.1021/jp805603b
• 信頼度 1.0

  “The band at about 1900 can be assigned to three-coordinated CO on Pd(111) or bridged CO on (100) planes.”

  Facile Redox Synthesis of Novel Bimetallic Crn+/Pd0 Nanoparticles Supported on SiO2 and TiO2 for Catalytic Selective Hydrogenation with Molecular Hydrogen DOI: 10.3390/catal11050583
• Ester 信頼度 1.0

  “coefficients.42 cm-1) and discuss the loadings or regression Citing (two points: 1900 and 1560 and the area under the Bro:43 cm-1) Kjeldahl and "…we looked at a number of commonly ester C=O stretching band (1900-1728 was calculated occurrin”

  Kollar 等 - 2017 - Nuclear Magnetic Resonance (1.40 T) and Mid Infrar DOI: 10.21577/0103-5053.20170031
• Acetate 信頼度 1.0

  “In the region 1402-1457 bands due to in which the bands due to the formation of imines in the area carbohydrates, glycoproteins, lipids and their characteristic cm-1, between 1900 and 1600 and the bands related to the C-O-H in-plane bending”

  Mura 等 - 2012 - FTIR nanobiosensors for Escherichia coli detection DOI: 10.3762/bjnano.3.55
• Hydroxyl (O-H) 信頼度 1.0

  “t absorption bands below 1900 The signals do match reasonably well with a mixture of h o CO-loss isomers from the parent 1-1 isomer shown in Figure 10b.”

  Photodynamics of [FeFe]-Hydrogenase Model Compounds with Bidentate Heterocyclic Ligands DOI: 10.1021/acs.jpcb.9b04675.
• Adsorbed carbon monoxide 信頼度 1.0

  “cm-1 Figure 3A shows that the absorption bands exist at 1750 - 1850 and 1900 cm-1, - 2100 which may be ascribed to bridge type and linear type of CO adsorbed on”

  In situ FTIR study on the formation and adsorption of CO on alumina-supported noble metal catalysts from H2 and CO2 in the presence of water vapor at high pressures DOI: 10.1039/c2cp23590k