What absorbs at 1177 cm⁻¹ in an FTIR spectrum?

빠른 답변

A band near 1177 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

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가능한 재료

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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 1177 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

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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

• Fluorine (C-F) 신뢰도 1.0

  “On the which can be attributable to and stretching viν other hand, brationalmodes,respectively, in 70wt.%PVdF-HFP-30 wt.%LiCF a(CF 2) band originating from PVdF-HFP was found at 3SO 3, 1176cm-1,1177 cm-1and1178cm-1inS30,6ECand6PCsamples.”

  Characteristics of PEMA/PVdF-HFP blend polymeric gel films incorporated with lithium triflate salt in electrochromic device DOI: 10.1016/j.ssi.2011.11.035
• Phosphate (PO4) 신뢰도 1.0

  “The P=O stretching at 1177 and 1184”

  Verma 等 - 2018 - Structural investigations on uranium(VI) and thori DOI: 10.1039/C7NJ04460G.
• Alkyl C-H 신뢰도 1.0

  “The main absorption peaks were cm-1, Additionally, some additional peaks were recorded at 1454 and 1381 due to the asymmetric observed at 3020 and 2943 cm-1, 1743 cm-1 and 1177 cm-1 due to CH stretching of methyl and methylene cm-1 and symm”

  Eleftheriadou 等 - 2020 - Development of Novel Polymer Supported Nanocomposi DOI: 10.3390/app10072368
• Ester 신뢰도 1.0

  “However, it is very difficult to determine the degree of esterification due to the presence Materials2022,15,470 8of13 and 1177 cm-1, a peak is formed of ester bonds in the polyester.”

  Grgac 等 - 2022 - The Effect of Ultrasonic Treatment on the Binding DOI: 10.3390/ma15020470
• 신뢰도 1.0

  “Moreover, asymmetric S O stretching 2 cm-1, cm-1, = at 1355 and symmetric S O stretching at 1177 were observed in the FTIR spectra 2 of tosylated cellulose, which confirmed the tosylation reaction.”

  A Composite Anion Conducting Membrane Based on Quaternized Cellulose and Poly(Phenylene Oxide) for Alkaline Fuel Cell Applications DOI: 10.3390/polym12112676
• Acetate 신뢰도 1.0

  “cm-1 1177 C-O-C stretch bands were found near 1016 The band near 754 work [25].”

  Tannic Acid-Loaded Hydroxyapatite Carriers for Corrosion Protection of Polyolefin-Coated Carbon Steel DOI: 10.3390/app122010263
• Fluorine (C-F) 신뢰도 1.0

  “cm-1 Similarly, this shifting exists in the new band displayed as a broad band at 1177 cm-1 v within the first 50 s that grows and stabilizes at 1170 corresponding to the s(CF 2) +”

  Torres-Rodriguez 等 - 2022 - Polyvinylidene Fluoride Aerogels with Tailorable C DOI: 10.3390/gels8110727
• 신뢰도 0.9

  “Absorbance band at about 1177 cm-1 (C-O).”

  Volatile out gassing characteristics of highly filled ethylene vinyl acetate binder materials: Gas phase infra-red spectroscopy DOI: 10.1016/j.polymertesting.2012.12.001