What absorbs at 436 cm⁻¹ in an FTIR spectrum?
A band near 436 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 436 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 |
|---|---|---|---|
| Metal oxygen | 3 | 3 | 1.0 |
| Carboxyl (COOH) | 3 | 2 | 1.0 |
| Alkyl C-H | 2 | 2 | 1.0 |
| Methacrylate | 2 | 1 | 1.0 |
| Acetate | 2 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Methyl | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Phosphate (PO4) | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Ketone | 1 | 0 | 1.0 |
| Ester | 1 | 0 | 1.0 |
| Carbonyl (C=O) | 1 | 0 | 1.0 |
| Amide | 1 | 0 | 1.0 |
| C c single bond | 1 | 0 | 1.0 |
순위는 단일 권위 규칙이 아닌 축적된 문헌 증거를 반영합니다. 항상 샘플 상황에 대해 확인하세요.
가능한 재료
| 재료 | 지원 피크 | 겹치는 그룹 | 인용 출처 |
|---|---|---|---|
| Fe3O4 | 436, 2358, 1673 | Metal oxygen, Alkyl C-H, Methacrylate | 1 |
| TiO2 | 436, 1700, 1093 | Metal oxygen, Alkyl C-H, Methacrylate | 1 |
| goethite | 436, 1470, 696 | Metal oxygen, Carboxyl (COOH) | 1 |
| Fe3O4 nanoparticles | 436, 1673, 1470 | Metal oxygen, Alkyl C-H, Methacrylate | 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 436 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
-
신뢰도 1.0
“In the low energy region of cm-1 the spectrum, the bond at ~ 436 is assigned to bending vibrations of Ti-O and Ti-O-Ti”
Effects of varying the soaking duration of Eosin Blue sensitized TiO2 photoanodes for dye-sensitized solar cells DOI: 10.1016/j.ijleo.2020.164169 -
Metal oxygen 신뢰도 1.0
“The weak 4 4 cm-1 vibration band detected at 436 could be ascribed to the W-O bending vibration [47].”
Abozaid 等 - 2018 - Characterization of Neodymium Doped Calcium Tungst DOI: 10.2298/SOS1804445A -
Alkyl C-H 신뢰도 1.0
“The intensity of the vibrational bands associated with C-H cm-1) cm-1) 436 stretch (2800-3000 and P-O-C stretch (1028 remain constant.”
Organic and Third Phase in HNO3/TBP/n-Dodecane System: No Reverse Micelles DOI: 10.1080/07366299.2017.1336048 -
Water (H2O) 신뢰도 1.0
“The peak in temperature of 436 °C, which can be attributed to the degradation of the polypropylene ◦C the range 48-95 can be attributed to the moisture loss of the hemp fibre.”
Characterisation of Hemp Fibres Reinforced Composites Using Thermoplastic Polymers as Matrices DOI: 10.3390/polym14030481 -
Aromatic ring 신뢰도 1.0
“and 1,436cm-1, Sm-MOFs tions of aromatic ring skeletons are 1,662 and The structure and morphology of the were 1,112cm-1 C-H field is the deformation vibration of bond of tested by FTIR, XRD, emission scanning electron 762cm-1 is the displa”
Wei 等 - 2022 - Preparation of metal-organic frameworks by microwa DOI: 10.1515/gps-2022-0060 -
Phosphate (PO4) 신뢰도 1.0
“Raman Spectra of bone and Type 2 samples material (demonstrated in Figure 1), (cm-1) Wavenumber Vibration Modes of Type2 Vibration Modes of Bone 436, 590, 988 Symmetric bending of P-O P-0 [5] 4-2 882, 1150 HPO Phosphate [5] 4385, 420 Lower”
Fabrication and Characterisation of Two-Layered Synthetic Titanium-Chitosan Bone Scaffolds DOI: 10.1007/978-3-030-92381-5_73 -
신뢰도 1.0
“[37] found that the ATR-FTIR spectra of 2O 3-adsorbed 1617 cm-1, 1458 cm-1, and 436 cm-1, respectively, indicating that Fe-O, CH3/COO and -OH in HFO cm-1 humic acid showed two new bands at 1348 and 1470 during the initial time points, which”
Removal of Tetracycline by Hydrous Ferric Oxide: Adsorption Kinetics, Isotherms, and Mechanism DOI: 10.3390/ijerph16224580 -
신뢰도 0.8
“Absorption peak at 436 cm-1 indicates goethite”
Efficiency of Fe3O4 Nanoparticles with Different Pretreatments for Enhancing Biogas Yield of Macroalgae Ulva intestinalis Linnaeus DOI: 10.3390/molecules26165105
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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.