What absorbs at 2090 cm⁻¹ in an FTIR spectrum?

빠른 답변

A band near 2090 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.

가능한 작용기 할당

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스펙트럼 로직

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 2090 cm⁻¹ is usually not enough for material identification by itself.

실제 사용

이러한 유형의 질의는 고분자 식별, 미지 플라스틱 스크리닝, QC 문제 해결, 재활용 재료 검증 및 문헌 기반 피크 할당 검토에서 일반적입니다.

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검증 조언

모호성이 남아 있는 경우, 특히 혼합물, 분해된 시료 및 충전 폴리머의 경우 DSC, GC-MS 또는 TGA로 가설을 검증하십시오.

이 할당의 배경이 되는 문헌

• 신뢰도 1.0

  “Two peaks at 2090 and 2081 Al 2 + peak could be due to oxidized Pt, the sample was reduced by are observed when CO O was passed over Pt/CeO 2/Al 2O 2 3”

  Bera 等 - 2003 - Promoting effect of CeO2 in combustion synthesized DOI: 10.1021/jp022132f
• 신뢰도 1.0

  “When 0.18 0.03 mol CO/(mol Au) are adsorbed on Au at C, which shows an IR band at 2090 ( oxygen is present in the gas phase, this species reacts with a turnover rate of 1.4 0.2 mol CO(mol Au min)-1, which is close to the steady-state turnov”

  In Situ Transient FTIR and XANES Studies of the Evolution of Surface Species in CO Oxidation on Au/TiO₂ DOI: 10.1021/jp0568733
• Adsorbed carbon monoxide 신뢰도 1.0

  “Keywords: CN(cid:2) 2108cm(cid:2)1 CN(cid:2) and CO adsorbed alone, the band is blue shifted from 2090 to at In comparison of Pt(110) ad 4cm(cid:2)1V(cid:2)1;”

  Tian 等 - 2011 - In situ FTIR studies of coadsorption of CNand CO DOI: 10.1016/j.jelechem.2011.04.028
• Silicon (Si) 신뢰도 1.0

  “Additionally, the cm-1 peaks at around 2090 are attributed to Si-H bonds (a shift of the Si-H stretching cm-1 mode from 2000 to 2090 is caused by the electronegativity difference between the nearest neighbouring atoms in the network structu”

  Cheng 等 - 2007 - Chemically active plasmas for deterministic assemb DOI: 10.1088/0022-3727/40/8/S10
• 신뢰도 1.0

  “The presence of the band at 2090 can be assigned Pd+ Pd/CeO sample (Fig.”

  Towards Methane Combustion Mechanism on Metal Oxides Supported Catalysts: Ceria Supported Palladium Catalysts DOI: 10.1007/s11244-019-01143-8
• Nitrile 신뢰도 1.0

  “The cross-section of spectra (Figure 2d) and the rFTIR line around 2090 cm-1 assigned to cyano stretching visample S1 in the OM photography in visible light (Figure 3a) shows a clearly visible ≡ bration ν(C N) (Figure 2e) confirmed the pres”

  Multianalytical Study of the Blue Pigments Usage in Serbian Iconography at the Beginning of the 18th-Century DOI: 10.3390/coatings13071200
• Silicon hydride 신뢰도 1.0

  “cm-1 and 1100 (bond generated by the interaction of the substrate surface with oxygen present in the cm-1 environment, previous activation), Si-H (640 cm-1 wagging mode and 2000 stretching vibration cm-1 modes), Si-H (2090 stretching vibrat”

  Gomez-Montano 等 - 2020 - Detection of Salmonella enterica on silicon substr DOI: 10.24275/rmiq/Bio993
• Alkene (C=C) 신뢰도 1.0

  “The AHC sample cm-1, shows a medium peak at 2090 which is characteristic of stretching allene (C=C=C).”

  Microwave-Assisted Hydrothermal Carbonization of Pomegranate Peels into Hydrochar forEnvironmental Applications DOI: 10.3390/en15103629