What absorbs at 1174 cm⁻¹ in an FTIR spectrum?

빠른 답변

A band near 1174 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 1174 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

• Alkyl C-H 신뢰도 1.0

  “The result of FTIR studies revealed different functional groups of organic compounds such as out-of-plane cm-1), cm-1), C-O-C bending (564 stretching (711 and CH stretching 2 cm-1) (1174 in chitosan.”

  Varma 和 Vasudevan - 2020 - Extraction, Characterization, and Antimicrobial Ac DOI: 10.1021/acsomega.0c01903
• Carbohydrate 신뢰도 1.0

  “Thermal gravimetric analysis was used to determine the total cm(cid:0) 1 band at ~1174 is correlated with proteoglycan protein for both amount of organic content in the shells (excluding the periostracum).”

  Organic biopolymers of venus clams: Collagen-related matrix in the bivalve shells with crossed-lamellar ultrastructure DOI: 10.1016/j.bbrep.2021.100939
• Alkyl C-H 신뢰도 1.0

  “The cm-1 therefore reasonable to record that ZnO NPs have been absorption at 1174, 1498, and 1597 is due to the (C-H”

  Bir 等 - 2022 - Multifunctional Ternary NLPZnO@L-cysteine-grafted DOI: 10.1021/acsomega.2c04936
• Acetate 신뢰도 1.0

  “C-H Symetric (CH 3) 1240 C-O Stretching (arylesters) 1174 v(C-O) of ester (cottonseed oil), TiO et BaSO vibration 2 4 1119”

  Chemical Degradation and Color Changes of Paint Protective Coatings Used in Solar Glass Mirrors DOI: 10.3390/coatings11040476
• Phospholipid 신뢰도 1.0

  “(PO2-) 1458 and 1396 The phosphodiester groups arise lipids arises at 1462 cm-1, cm-1,1174 cm-1 cm-1, 1233 and 1079 which from phospholipids bands at 1339”

  Toxicity mechanism of Cu2+ ion individually and in combination with Zn2+ ion in characterizing the molecular changes of Staphylococcus aureus studied using FTIR coupled with chemometric analysis DOI: 10.1007/s10867-020-09560-7
• Acetate 신뢰도 1.0

  “cm-1 (out-of-plane curved NH, out-of-plane curved C-O), 711 (out-of-plane curved NH), cm-1 cm-1 cm-1 1174 (C-O-C stretch), 2865 (CH stretch), and 3594 (-OH stretch).”

  Extraction Optimization and Structural Characteristics of Chitosan from Cuttlefish (S. pharaonis sp.) Bone DOI: 10.3390/ma15227969
• Alkyl C-H 신뢰도 1.0

  “LLM confirmed rule peak-group candidate”

  Kumar 和 Barth - 2010 - Following Enzyme Activity with Infrared Spectrosco DOI: 10.3390/s100402626
• Hydroxyl (O-H) 신뢰도 1.0

  “Materials 2022, 15, 8826 11 of 18 spectra were found to exhibit very intense double bands with maxima at 1258 and 1174 cm-1 assigned to the CAr-O-H groups from the phenol moieties.”

  A Top-Down Approach and Thermal Characterization of Luminescent Hybrid BPA.DA-MMA@Ln2L3 Materials Based on Lanthanide(III) 1H-Pyrazole-3,5-Dicarboxylates DOI: 10.3390/ma15248826