What absorbs at 3170 cm⁻¹ in an FTIR spectrum?
A band near 3170 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 7 cited sources
Kiire vastus
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.
Võimalikud funktsionaalrühmade määramised
| Funktsionaalrühm | Toetavad faktid | Tsiteeritud allikad | Kõrgeim usaldusväärsus |
|---|---|---|---|
| N h | 2 | 2 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Sulfate (SO4) | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
Reiting kajastab kogunenud kirjanduslikke tõendeid, mitte ühte autoriteetset reeglit. Kinnitage alati oma proovi kontekstis.
Võimalikud materjalid
| Materjal | Toetavad piigid | Kattuvad rühmad | Tsiteeritud allikad |
|---|---|---|---|
| humic acid | 3170, 1660, 1220 | Hydroxyl (O-H), Aromatic ring | 1 |
| TiO | 3170, 1730, 1699 | Hydroxyl (O-H) | 1 |
| biomass | 3170, 1082, 1282 | Hydroxyl (O-H), Aromatic ring | 1 |
| coal | 3170, 1600, 3030 | Hydroxyl (O-H), Aromatic ring | 1 |
Materjale kuvatakse ainult siis, kui sama kirjanduse kogum toetab seda riba ja vähemalt ühte täiendavat iseloomulikku piiki.
Spektri loogika
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.
Reaalse maailma kasutus
Seda tüüpi päring on tavaline polümeeri tuvastamisel, tundmatu plasti sõeluuringul, kvaliteedikontrolli probleemide lahendamisel, ringlussevõetud materjali kontrollimisel ja kirjandusel põhineval piirkinnituste ülevaatel.
Levinud vead
- Ühe isoleeritud riba käsitlemine materjali tõendina ilma vähemalt ühte või kahte toetavat piiki kontrollimata.
- Ülekattumise ignoreerimine: mitu funktsionaalrühma võivad anda panuse sama lainearvu lähedal.
- Valideerimise vahelejätmine, kui lisandid, segud, oksüdatsioon või saastumine võivad spektrit moonutada.
Kontrollimise nõuanne
Kui ebakindlus püsib, kinnitage hüpotees DSC, GC-MS või TGA abil, eriti segude, lagunenud proovide ja täidetud polümeeride puhul.
Nende määramiste taga olev kirjandus
-
Secondary amine usaldusväärsus 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 usaldusväärsus 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 usaldusväärsus 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 -
usaldusväärsus 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 -
usaldusväärsus 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 usaldusväärsus 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 usaldusväärsus 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
Kas teil on selle ribaga spekter?
Laadige üles oma FTIR spekter ja saage sekunditega täielik tõlgendusaruanne — piikide määramised kirjandusviidetega, raamatukogu vasted ja usaldusväärsusega hinnatud tõendite ahel.