What absorbs at 3081 cm⁻¹ in an FTIR spectrum?
A band near 3081 cm⁻¹ can point to several functional groups. Below are the most likely assignments, ranked by how much published evidence supports each — every one traceable to literature (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 8 cited sources
빠른 답변
A band near 3081 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
| 작용기 | 지원 사실 | 인용 출처 | 최고 신뢰도 |
|---|---|---|---|
| Alkyl C-H | 7 | 7 | 1.0 |
| Aromatic ring | 3 | 3 | 1.0 |
| Alkene (C=C) | 2 | 2 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Styrene | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
순위는 단일 권위 규칙이 아닌 축적된 문헌 증거를 반영합니다. 항상 샘플 상황에 대해 확인하세요.
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 3081 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.
일반적인 실수
- 하나의 고립된 밴드를 재료의 증거로 취급하고 최소 하나 또는 두 개의 지원 피크를 확인하지 않는 것.
- 겹침 무시: 여러 작용기가 동일한 파수 근처에서 기여할 수 있습니다.
- 첨가제, 혼합물, 산화 또는 오염이 스펙트럼을 왜곡할 수 있는 경우 검증을 건너뜁니다.
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
-
Alkyl C-H 신뢰도 1.0
“LLM confirmed rule peak-group candidate”
60MeV Ni ion induced modifications in nano-CdS/polystyrene composite films DOI: 10.1016/j.radphyschem.2013.06.022 -
Alkyl C-H 신뢰도 1.0
“cm-1 ν(CH) 3090-2850 that correspond to alkane modes, with peaks at 3081, 3060, 3028, cm-1.”
Czylkowska 等 - 2021 - Cytotoxic Activity against A549 Human Lung Cancer DOI: 10.3390/ijms22136692 -
Alkyl C-H 신뢰도 1.0
“Assignment C-H aromatic ring C-H stretching 3081,3060,3027 ν methyl 2962 (CH 3), C-H asymmetric stretching asym ν methylene (CH 2), C-H asymmetric stretching 2927”
Filip 等 - 2013 - Investigation of thermal and catalytic degradation DOI: 10.2478/s11532-013-0202-y -
Alkene (C=C) 신뢰도 1.0
“At the same time, the peak present in the 3081 in the PPI spectra may be due to cm-1 the presence of =C-H stretching vibration from the alkene functional group.”
Kasar 和 Ahmaruzzaman - 2022 - Characterization of liquid products obtained from DOI: 10.1038/s41598-022-15371-8 -
Alkyl C-H 신뢰도 1.0
“In cm-1, cm-1 In the curve of the AllylEHO, new peaks are observed at 3081 1646 and the curve of the AllylEHO, new peaks are observed at 3081 cm-1, 1646 cm-1 and 926 cm-1 cm-1 926 representative of the C-H aliphatic stretch of the character”
Preparation of Bis[(3-ethyl-3-methoxyoxetane)propyl]diphenylsilane and Investigation of Its Cationic UV-Curing Material Properties DOI: 10.3390/polym13152573 -
Aromatic ring 신뢰도 1.0
“f cm-1 reaction (Table 2, entry 2) was performed without a solvent, -C-H FTIR: 3081.43 for aromatic stretching, 2983.48 cm-1 without cashew shell extract, and with microwave irradiation -C-H for aliphatic stretching, 1654.06 and 1621.27”
Manjare 等 - 2023 - Microwave-Assisted Rapid and Green Synthesis of Sc DOI: 10.1021/acsomega.2c05187 -
Alkene (C=C) 신뢰도 1.0
“stretching wave numbers appear in the range of 3000-3100 Accordingly, in cm-1 the present study, the aromatic =C-H stretching gives bands at 3081 in the”
Growth, crystal structure, Hirshfeld surface and vibrational properties of a new supramolecular hybrid material: (C4H7N2)2TeBr6 DOI: 10.1007/s00289-021-04053-6 -
신뢰도 1.0
“The 1480 cm-1 3 (symmetric NH bend), the 906 cm-1 (NH 3+/CH rock) and the 3081 cm-1 (N-H stretch) 3+ 3”
Characterization of a New Low Temperature Encapsulation Method with Ethylene-Vinyl Acetate under UV Irradiation for Perovskite Solar Cells DOI: 10.3390/app12105228
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FTIR 스펙트럼을 업로드하면 몇 초 안에 전체 해석 보고서(문헌 인용이 포함된 피크 할당, 라이브러리 매칭, 신뢰도 평가 증거 체인)를 받을 수 있습니다.