What absorbs at 3680 cm⁻¹ in an FTIR spectrum?
A band near 3680 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 3680 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 |
|---|---|---|---|
| Hydroxyl (O-H) | 8 | 7 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Hydrogen bond | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 0.8 |
순위는 단일 권위 규칙이 아닌 축적된 문헌 증거를 반영합니다. 항상 샘플 상황에 대해 확인하세요.
가능한 재료
| 재료 | 지원 피크 | 겹치는 그룹 | 인용 출처 |
|---|---|---|---|
| polyurethane | 3680, 2270, 1700 | N h | 1 |
| TiO2 | 3680, 1700, 1093 | Hydroxyl (O-H), Carboxyl (COOH) | 1 |
| water | 3680, 1018, 2945 | Hydroxyl (O-H), Water (H2O) | 1 |
| zirconia | 3680, 1100, 460 | Hydroxyl (O-H), Carboxyl (COOH), Water (H2O) | 1 |
동일한 문헌 풀이 이 밴드와 하나 이상의 추가 특징 피크를 지원하는 경우에만 물질이 표시됩니다.
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 3680 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
-
Hydroxyl (O-H) 신뢰도 1.0
“The double peaks at 3680 cm-1 and 3633 cm-1 were observed due to the stretching vibration of the hydroxyl group at the surface of HNTs.”
Synthesis and Optimization of Superhydrophilic-Superoleophobic Chitosan–Silica/HNT Nanocomposite Coating for Oil–Water Separation Using Response Surface Methodology DOI: 10.3390/nano12203673 -
신뢰도 1.0
“The group of peaks from 3680 cm-1 to 3482 cm-1 intense spectral features at 938 and 3680 cm-1 correspond to the position of peaks that arise from OHstretching modes, where OHgroups are bound to Mg (serpentine and stitchtite) or Cr (stitchti”
Melchiorre 等 - 2020 - Insights on Structure and Threshold Detection Limi DOI: 10.3390/min10030215 -
Hydroxyl (O-H) 신뢰도 1.0
“spectra with similar features in this region, in addition to a free Figure 2c shows the probability of a water molecule forming cm-1.22,25,95 cm-1 ∼3680 The 3200 peak has been OH stretch at a particular number of hydrogen bonds within the d”
Moussa 等 - 2009 - Experimental and Theoretical Characterization of A DOI: 10.1021/jp808710n -
Hydroxyl (O-H) 신뢰도 1.0
“The vibrational bands at between between 3680 cm-1 and 3120 cm-1 are due to O-H and N-H stretching and can be attributed to cm-1 cm-1 between 3680 cm-1 and 3120 cm-1 are due to O-H and N-H stretching and can be attributed to 3680 and 3120 a”
Self-Healable Supramolecular Vanadium Pentoxide Reinforced Polydimethylsiloxane-Graft- Polyurethane Composites DOI: 10.3390/polym11010041 -
Hydroxyl (O-H) 신뢰도 1.0
“CO stretching asym CaCO3 cm-1, 1050-1015 SO stretching Ca(SO4)·2H2O An intense band, between 3680 and 3000 is related to the OH stretchings of celcm-1 870-880 CO stretching asym CaCO3 lulose [46] and absorbed water, while the bending of thi”
Water-Based Aerosol for Book Deacidification: Experimental Apparatus and Theoretical Interpretation of Results DOI: 10.3390/molecules26144249 -
Hydroxyl (O-H) 신뢰도 1.0
“The band of isolated OH groups at 3772 disappeared nearly completely, whereas the intensity of the cm1 hydroxyl stretch vibration band at 3680 decreased”
Adsorption and Reaction of CO on (Pd–)Al2O3 and (Pd–)ZrO2: Vibrational Spectroscopy of Carbonate Formation DOI: 10.1007/s11244-017-0852-7 -
Hydroxyl (O-H) 신뢰도 1.0
“The results are presented in Table 2 that spectra of feedstock mainly possess peaks at around 3680cm-1 cm-1 O-H lignin, 1 3000 are assigned to stretching from peaks around 3000-2800 represent the C-H stretching 3 D cm-1”
Jaruwat 等 - 2018 - Effects of Hydrothermal Temperature and Time of Hy DOI: 10.1063/1.5053192 -
Hydroxyl (O-H) 신뢰도 1.0
“This spectrum Scientific), low-temperature chamber (Harrick evacuated to the lowest (3725cm-1, exhibits IR bands of surface hydroxyls of anatase (ca.<10-3mbar) stable pressure and kept under dynamic vacuum for 3632cm-1) (3680cm-1, 3414cm-1)”
Litke 等 - 2019 - Interfacial charge transfer in Pt-loaded TiO2 P25 DOI: 10.1016/j.jphotochem.2018.10.023
이 밴드가 있는 스펙트럼이 있나요?
FTIR 스펙트럼을 업로드하면 몇 초 안에 전체 해석 보고서(문헌 인용이 포함된 피크 할당, 라이브러리 매칭, 신뢰도 평가 증거 체인)를 받을 수 있습니다.