What absorbs at 1502 cm⁻¹ in an FTIR spectrum?

빠른 답변

A band near 1502 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

순위는 단일 권위 규칙이 아닌 축적된 문헌 증거를 반영합니다. 항상 샘플 상황에 대해 확인하세요.

가능한 재료

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 1502 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

  “The absorption bands at 668 1502 cm-1 cm-1 and 1440 indicate the metallic stretching vibrations in Fe - O.”

  Effect of Gd and Nb on Dielectric and Magnetic Transition temperature of BaTiO3- Li0.5Fe2.5O4 Composites DOI: 10.1016/j.physb.2019.02.035
• Ring structure 신뢰도 1.0

  “Ring stretching 1556 1556 1558 Ring stretching 1502 1498 1498 - Coordinate bond 1461 1461 +CH bending”

  Intercalation and in situ formation of coordination compounds with ligand 8-hydroxyquinoline-5-sulfonic acid in the interlayer space of layered silicate magadiite by solid-solid reactions DOI: 10.1016/j.micromeso.2018.02.038
• Alkyl C-H 신뢰도 1.0

  “The peaks at 1502, 1508 and 1249 vibration.27 cm-1 CH stretching are related to C=C bonds in the aromatic”

  Allouch 等 - 2019 - CHARACTERIZATION OF COMPONENTS ISOLATED FROM ALGER DOI: 10.1016/j.pecs.2012.02.002
• Alkene (C=C) 신뢰도 1.0

  “266 cm-1 The spectra also exhibited a low-intensity band at 1502 associated with C=C 267 cm-1, vibrations of aromatic rings, bands at 1486 and 1469 associated with CH and CH”

  Franca 等 - 2020 - Monitoring diclofenac adsorption by organophilic a DOI: 10.1016/j.envpol.2013.04.012
• Acetate 신뢰도 1.0

  “absorbance from bands at 1730 1502 1370 1234 and 834 (Figure S2B), absorbance from bands at 1730 cm-1, 1502 cm-1, 1370 cm-1, 1234 cm-1, and 834 cm-1 (Figure S2B), which C=O which are mainly ascribed to the stretch in the glucuronic acid of”

  Even Visually Intact Cell Walls in Waterlogged Archaeological Wood Are Chemically Deteriorated and Mechanically Fragile: A Case of a 170 Year-Old Shipwreck DOI: 10.3390/molecules25051113
• C c single bond 신뢰도 1.0

  “The sharp peaks for nitro compounds (N-O symmetric stretch) N-O asymmetric stretch Nitro compounds 1504.7608 1507.6201 1505.7042 1501.9015 - C-C stretch (in-ring) Aromatics 1559.0875”

  Hydrolysis, Microstructural Profiling and Utilization of Cyamopsis tetragonoloba in Yoghurt DOI: 10.3390/fermentation9010045
• Ring structure 신뢰도 1.0

  “The presence of a band at 1502 cm-1 indicates the tetrazole (CN 4) ring.”

  Mahapatra 等 - 2011 - Dissolution Enhancement and Physicochemical Charac DOI: 10.14227/DT180111P39
• Alkyl C-H 신뢰도 1.0

  “The peaks cm-1 at 2923 and 2835 can be assigned to the C-H stretching and the peaks at 1502 and cm-1 1589 were assigned to the C=C stretching bond in the aromatic ring (dashed line cm-1, pointed in Figure 3).”

  Development of an Electrospun Patch Platform Technology for the Delivery of Carvedilol in the Oral Mucosa DOI: 10.3390/nano12030438