What absorbs at 1473 cm⁻¹ in an FTIR spectrum?
A band near 1473 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 8 cited sources
Ātra atbilde
A band near 1473 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.
Iespējamie funkcionālo grupu piešķīrumi
| Funkcionālā grupa | Atbalstošie fakti | Citētie avoti | Augstākā pārliecība |
|---|---|---|---|
| Alkene (C=C) | 4 | 3 | 1,0 |
| Amide | 3 | 3 | 1,0 |
| Alkyl C-H | 2 | 2 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| C n single bond | 2 | 2 | 1,0 |
| Carboxyl (COOH) | 2 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Carbonate | 1 | 1 | 0,9 |
Rangs atspoguļo uzkrātos literatūras pierādījumus, nevis vienu autoritatīvu noteikumu. Vienmēr apstipriniet atbilstoši parauga kontekstam.
Spektra loģika
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 1473 cm⁻¹ is usually not enough for material identification by itself.
Reālās pasaules izmantošana
Šāda veida vaicājums ir izplatīts polimēru identificēšanā, nezināmas plastmasas skrīningā, kvalitātes kontroles problēmu risināšanā, pārstrādāto materiālu pārbaudē un ar literatūru pamatotā pīķu piešķīruma pārskatā.
Biežākās kļūdas
- Vienas izolētas joslas uzskatīšana par materiāla pierādījumu, nepārbaudot vismaz vienu vai divus atbalsta pīķus.
- Ignorējot pārklāšanos: vairākas funkcionālās grupas var dot ieguldījumu tuvu tam pašam viļņa skaitlim.
- Izlaist validāciju, ja piedevas, maisījumi, oksidācija vai piesārņojums var izkropļot spektru.
Verifikācijas padoms
Ja joprojām pastāv neskaidrība, apstipriniet hipotēzi ar DSC, GC-MS vai TGA, īpaši maisījumiem, noārdītiem paraugiem un pildītiem polimēriem.
Literatūra aiz šiem piešķīrumiem
-
pārliecība 1,0
“1473cm-1 represents vibrations of the oxygen octahedra with 1623cm-1 Transmittance(arb.”
Ghosh 等 - 2013 - Vibrational Modes And Electronic Structure Of Sr2G DOI: 10.1063/1.4791287 -
Alkyl C-H pārliecība 1,0
“sym(C-H) 3-N+.26 chain25 and of CH methylene (cid:238) In the surfactant mixture (Figure 2a, dashed line), the cm-1 are attributed to peaks (doublet) at 1473 and 1465 2scissoringmodeandaccountforaparallelpacking theCH of the trans methylene”
Nikoobakht 和 El-Sayed - 2001 - Evidence for bilayer assembly of cationic surfacta DOI: 10.1021/la010530o -
Amide pārliecība 1,0
“obtainedat1462cm(cid:1)1[Fig.3(b)]andatthesecondofthestrong wavenumber of the Amide II band and which has been loosely Access cm(cid:1)1 b-sheets.5 paraffin signicant attributed to peaks, 1473 [Fig.”
Al Jedani 等 - 2020 - A de-waxing methodology for scanning probe microsc DOI: 10.1039/d0ay00965b -
pārliecība 1,0
“cm1 cm1 (alone) appeared at 3358 (stretching of N-H bond), 3087 and 3094 (stretching of C-H and O-H cm1 bonds), 1772 and 1662 (stretching of C = C, C = O and C = N bonds and bending of N-H bond) and cm1 1473 and 1364 (stretching and bending”
Ali 等 - 2023 - Nitazoxanide and azithromycin for the early treatm DOI: 10.21203/rs.3.rs-1745239/v1 -
Alkene (C=C) pārliecība 1,0
“The two medium bands at 1539 cm-1 were assigned to the pyridine skeletal stretching -2.7 formation of the desired product are the broad signal to ppm associated with the NH and two medium bands at 1539 cm-1 and 1473 cm-1 correspond to C=C a”
Synthesis of a New Co Metal–Organic Framework Assembled from 5,10,15,20-Tetrakis((pyridin-4-yl) phenyl)porphyrin “Co-MTPhPyP” and Its Application to the Removal of Heavy Metal Ions DOI: 10.3390/molecules28041816 -
Amide pārliecība 1,0
“C=O pyranose ring (2892 stretching, NH-Ac (1644 and C-N stretching (1473 HA showed cm-1);”
Dual-responsive (pH/temperature) Pluronic F-127 hydrogel drug delivery system for textile-based transdermal therapy DOI: 10.1038/s41598-019-48254-6 -
Phosphate (PO4) pārliecība 1,0
“(cm-1 PZ-HEMA-1 : 6 ) were 2947 (CH2), 1720 (C=O), 1635 istic IR bands PZ-HEMA-LA (C=C), 1473 (CO-O), 1033 (P-O-C), 1168 (phosphazene 31 1 (𝛿 P-NMR peaks: 1.5 = ppm);”
Martinez Ceballos 等 - 2013 - Synthesis and Characterization of Polyphosphazenes DOI: 10.1155/2013/645869 -
Alkyl C-H pārliecība 1,0
“- 1 overlap with the spectrum of paraffin wax, as highlighted by the presence of bands at 2915 and 2848 cm (CH - 1 - 1 - 1 stretching), 1473 cm (CH bending), 1380 cm (CH bending), 728 and 719 cm (CH rocking) [24-26].”
Pianorsi 等 - 2017 - Organogels for the cleaning of artifacts DOI: 10.1515/pac-2016-0908
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