What absorbs at 665 cm⁻¹ in an FTIR spectrum?
A band near 665 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 665 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 | 3 | 3 | 1.0 |
| N h | 3 | 3 | 1.0 |
| Ring structure | 2 | 2 | 1.0 |
| Hydroxyl (O-H) | 2 | 1 | 1.0 |
| Metal oxygen | 2 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| Carbonate | 1 | 1 | 1.0 |
| Hydrogen bond | 1 | 1 | 1.0 |
| Metalloid oxygen | 1 | 1 | 0.85 |
| Alkene (C=C) | 1 | 1 | 0.8 |
| Sulfur | 1 | 0 | 1.0 |
| Thiol | 1 | 0 | 0.9 |
순위는 단일 권위 규칙이 아닌 축적된 문헌 증거를 반영합니다. 항상 샘플 상황에 대해 확인하세요.
가능한 재료
| 재료 | 지원 피크 | 겹치는 그룹 | 인용 출처 |
|---|---|---|---|
| Chitosan | 665, 1650, 1655 | Alkyl C-H, Hydroxyl (O-H), N h | 2 |
| ZnO | 665, 1400, 3430 | Hydroxyl (O-H), Alkyl C-H | 1 |
| sodium alginate | 665, 1636, 1080 | Hydroxyl (O-H), Alkyl C-H | 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 665 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
“Er3+ with increasing the concentration of ions in the glass (300-665cm-1) termediate region which is ascribed to deformation of ΔT (>100°C) as well the higher values (which are higher than other the vibrational modes of the glass network wi”
Structural and optical properties of TeO2-Li2O-ZnO-Nb2O5-Er2O3 glass system DOI: 10.1016/j.jnoncrysol.2018.08.011 -
신뢰도 1.0
“assigned to chain axis O(3) vibrations”
Khan 等 - 2004 - Effects of post-annealing on the infrared active p DOI: 10.1016/j.physc.2004.04.029 -
Metal oxygen 신뢰도 1.0
“665cm-1 confirmed Zn-O stretching vibrations A broad band at (2.5% Mn-doped ZnO), 3.61eV (5% Mn-doped ZnO), and (Almehizia et al., 2021).”
Khan 等 - 2022 - Microwave-Assisted Green Synthesis of Pure and Mn- DOI: 10.3389/fmats.2021.710155 -
Alkyl C-H 신뢰도 1.0
“The obvious peaks at 2926 and 2859 cm-1 correspond to organic compounds that cm-1 cm-1 The flattened peak at 1422 and the medium one at 665 are attributed to The flattened peak at 1422 cm-1 and the medium one at 665 cm-1 are attributed to c”
Technological and Functional Approaches Applied to Miniature Vessels with Pigment Traces: Two Middle Bronze Age Case Studies from Eastern Subcarpathians of Romania DOI: 10.3390/app13042093 -
Hydroxyl (O-H) 신뢰도 1.0
“amide-IV al.14 et by Gonzaga The broad and strong band located 665 amide-V cm-1 between 3490 and 3256 in the FTIR spectrum is attributed to the axial stretching of the O-H and N-H”
Gonzaga 等 - 2020 - Chitosan and Agaricus brasiliensis Polysaccharides DOI: 10.21577/0103-5053.20190264 -
신뢰도 1.0
“The A magnification of this eV region cm-1 N-H peak observed at 665”
Gurumendi 等 - 2023 - Enhanced Chitosan Photoluminescence by Incorporati DOI: 10.1021/acsomega.2c08072 -
Ring structure 신뢰도 1.0
“The peak at 665 is assigned to out of plane vibrations involving ring structures (Jaouadi, M'sahli & Sakli, 2009), cm-1 the peak at 894 can be attributed to the presence of b-glycosidic linkages between the monosaccharides (Reddy, Ashok, Re”
Maache 等 - 2017 - Characterization of a novel natural cellulosic fib DOI: 10.1016/j.carbpol.2017.04.096 -
Alkyl C-H 신뢰도 1.0
“cm-1 The absorption at 1352 corresponding to the stretching,40 vibration of S=O and the presence of fucoidan Composite films sodium alginate-based elaborated cm-1 reported.41 sulfate groups at 835 was Also, the band cm-1 around 665 is attri”
Villacres 等 - 2023 - Preparation of Composite Films of Sodium Alginate- DOI: 10.21577/0103-5053.20230064
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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.