What absorbs at 3170 cm⁻¹ in an FTIR spectrum?

Brzi odgovor

A band near 3170 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.

Moguće dodjele funkcionalnih skupina

Rangiranje odražava akumulirane literaturne dokaze, a ne jedno autoritativno pravilo. Uvijek provjerite u kontekstu vašeg uzorka.

Mogući materijali

Materijali su prikazani samo kada ista literatura podržava ovu traku i barem jedan dodatni karakteristični vrh.

Logika spektra

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 3170 cm⁻¹ is usually not enough for material identification by itself.

Upotreba u stvarnom svijetu

Ova vrsta upita uobičajena je u identifikaciji polimera, probiru nepoznate plastike, rješavanju problema u kontroli kvalitete, provjeri recikliranog materijala i pregledu dodjele vrhova potkrijepljenom literaturom.

Uobičajene pogreške

• Tretiranje jedne izolirane vrpce kao dokaza materijala bez provjere barem jednog ili dva podržavajuća pika.
• Zanemarivanje preklapanja: više funkcionalnih skupina može doprinositi u blizini istog valnog broja.
• Preskakanje validacije kada aditivi, mješavine, oksidacija ili kontaminacija mogu izobličiti spektar.

Savjet za provjeru

Kada nejasnoća ostane, validirajte hipotezu pomoću DSC, GC-MS ili TGA, posebno za mješavine, degradirane uzorke i punjene polimere.

Literatura iza ovih dodjela

• Secondary amine pouzdanost 1,0

  “2 cm(cid:1)1 in CZTS samples those matched with stretching These bands are replaced by new band at 3170 vibration from the secondary amine group.”

  CZTSxSe1−x nanocrystals_ Composition dependent method of preparation, morphological characterization and cyclic voltammetry data analysis DOI: 10.1016/j.solmat.2016.06.030
• Ring structure pouzdanost 1,0

  “The other two n-mers and the distinct peak at 3540 cm-1 tightly bound cyclic-OH tetramers at 3280 and 3170 cm-1, respectively.”

  Ketren 等 - 2019 - Investigation on Conversion Pathways in Degradativ DOI: 10.3390/en12030528
• N h pouzdanost 1,0

  “Raman spectrum this absorption is very small and lies at 1671 The strong absorption in the 3170cm-1 3080 region arises from the NH stretching vibrations.”

  Synthesis, Molecular Structure and Spectral Properties of Quaternary Ammonium Derivatives of 1,1-Dimethyl-1,3-propylenediamine DOI: 10.1016/j.molstruc.2007.04.036
• pouzdanost 1,0

  “Spectra of of the zinc sulfate revealed peaks at 3170 related to OH stretching, at 1640 cm-1 4the zinc sulfate revealed peaks at 3170 cm-1 related to OH stretching, at 1640 cm-1 assigned assigned to water, and at 1060 and 980 linked to SO s”

  Humic Acid Improves Zn Fertilization in Oxisols Successively Cultivated with Maize–Brachiaria DOI: 10.3390/molecules26154588
• pouzdanost 1,0

  “First of all, the main peak in the high frequency region (at ~3170 cm, the N-H stretching”

  Pargoletti 等 - 2020 - ORR in Non-Aqueous Solvent for Li-Air Batteries T DOI: 10.3390/nano10091735
• Alkyl C-H pouzdanost 1,0

  “The spectrum of PANI-EB (spectrum a in Figure 1a) shows the phenyl C-H stretched at 3170 cm-1.”

  Talib 等 - 2022 - Study the structural and electrical properties of DOI: 10.15251/JOR.2022.183.389
• Aromatic ring pouzdanost 1,0

  “N-H band at 3330.38 and a peak of aromatic stretching vibrations at 3170.10 cm-1 The C=O and P=O stretching vibrations are depicted by the peaks at 1744.39 and”

  Fabrication of PEGylated Chitosan Nanoparticles Containing Tenofovir Alafenamide: Synthesis and Characterization DOI: 10.3390/molecules27238401