What absorbs at 474 cm⁻¹ in an FTIR spectrum?
A band near 474 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 474 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 |
|---|---|---|---|
| Silicon-oxygen (Si-O) | 3 | 3 | 1.0 |
| Phosphate (PO4) | 3 | 3 | 1.0 |
| Silicon (Si) | 2 | 2 | 1.0 |
| Siloxane (Si-O-Si) | 2 | 2 | 1.0 |
| Metal oxygen | 2 | 2 | 1.0 |
| Carbonyl (C=O) | 2 | 2 | 1.0 |
| Protein | 1 | 1 | 1.0 |
| N n bond | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| Sulfate (SO4) | 1 | 1 | 1.0 |
| S s | 1 | 1 | 0.9 |
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 474 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
-
Sulfate (SO4) 신뢰도 1.0
“The results of the calorimetric study of bands observed at 474 and 434 are assigned to ν ν Cs 4(AsO 4) and 2(SO 4) [20, 21].”
Mtioui 等 - 2015 - Thermal behavior and dielectric and vibrational st DOI: 10.1007/s11581-014-1196-y -
Metal oxygen 신뢰도 1.0
“In contrast 0.0 cm-1, to untreated TiO, a strong peak at 1300 -80 -60 -40 -20 0 20 assignable to the Ti-O stretching vibrations, peak at Zeta Potential (mV) cm-1, assignable to the C=O stretching vibrations, 474 3: Zeta potential of TiO nan”
Singh 等 - 2016 - FT-IR and Zeta Potential Measurements on TiO Nanop DOI: 10.1063/1.4948233 -
N n bond 신뢰도 1.0
“The sample x = 100 wt % - - n n = = 1 1 (MCZMFO) exhibits the two prominent vibration bands at and , 474 .”
Synthesis and characterization of (100-x) Ba0.82Sr0.03Ca0.15Zr0.10Ti0.90O3 + (x) Mg0.25Cu0.25Zn0.5Mn0.05Fe1.95O4 composites with improved magnetoelectric voltage coefficient DOI: 10.1016/j.jallcom.2017.11.066 -
Carbonyl (C=O) 신뢰도 1.0
“The higher peak intensities of (cm-1) 474 methyl esterified stretching vibration of carbonyl group (C=O) at ~1740 in commercial pectin”
Evaluation of structural integrity and functionality of commercial pectin based edible films incorporated with corn flour, beetroot, orange peel, muesli and rice flour DOI: 10.1016/j.foodhyd.2019.01.022 -
Metal oxygen 신뢰도 1.0
“LLM confirmed rule peak-group candidate”
Structurally enriched aliovalent Cd2+-doped SnO2 nanocrystals and their physicochemical investigations DOI: 10.1007/s10854-021-06217-6 -
Phosphate (PO4) 신뢰도 1.0
“Two PO bending modes at 569.6 and bands were attributed to the 4(PO 4) modes .The 473.9cm-1 toν bands observed around were attributed 2(PO 4) modes.”
Wang 等 - 2005 - Nanostructure properties of hydroxyapatite nanobel DOI: 10.4028/www.scientific.net/KEM.288-289.187 -
신뢰도 1.0
“tions near 780 and 800 Si-O asymmetric bending from an overlapping of characteristic peaks for each cm-1 vibrations at 474 and symmetric vibrations of the one of the involved minerals in the infrared and Raman cm-1.”
Delgado Robles 等 - 2015 - Non-destructive in situ spectroscopic analysis of DOI: 10.1186/s40494-015-0048-z -
Protein 신뢰도 1.0
“An additional peak at 474 has α-Se these particles also melt with electronic impact even been attributed to the protein vibration which is mixed with then the hollow sphere would not be produced because amorphous Se.”
Husen 和 Siddiqi - 2014 - Plants and microbes assisted selenium nanoparticle DOI: 10.1186/s12951-014-0028-6
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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.