What absorbs at 1353 cm⁻¹ in an FTIR spectrum?

Ātra atbilde

A band near 1353 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

Rangs atspoguļo uzkrātos literatūras pierādījumus, nevis vienu autoritatīvu noteikumu. Vienmēr apstipriniet atbilstoši parauga kontekstam.

Iespējamie materiāli

Materiāli tiek parādīti tikai tad, ja šo joslu un vismaz vienu papildu raksturīgo pīķi atbalsta tā pati literatūras kopa.

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 1353 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

• Amide pārliecība 1,0

  “cm-1 cm-1 cm-1 cm-1 to 720 (a) and from 1850 to 1300 (b) ranging from 1850 070007-4 In PEI-F-ICJ spectrum, the intensity of bands relative to asymmetric stretching vibration of carbonyl imide (1722 cm-1) cm-1) and C-N stretching vibration (”

  Sonego 等 - 2016 - Chemical Changes in Polyetherimide (PEI) Joined by DOI: 10.1063/1.4965539
• Acetate pārliecība 1,0

  “The band at 1353 cm-1 can be attributed to C-O-H bending cm-1 cm-1 OH deformation in the band at 1474 [44,45].”

  Pore Blocking by Phenolates as Deactivation Path during the Cracking of 4-Propylphenol over ZSM-5 DOI: 10.3390/catal11060721
• Alkyl C-H pārliecība 1,0

  “cm-1, C-H new bands at 1353 and 848 corresponding to the Consequently, the resulting hydrogel would assume a cm-1, Cbending vibration, and at 1252 corresponding to the ∼71 composition containing wt % lignin.”

  Teng 等 - 2017 - Preparation and Properties of Hydrogels Based on P DOI: 10.1021/acsomega.6b00296
• Amide pārliecība 1,0

  “The band at cm-1 corresponds to the amide groups of proteins which could be released by aromatic carbon 1638.38 compounds and carbon double bonds as well as alkene groups (-C-H stretch) [50], while these at 1399.65, 1384.55 cm-1 1081.96cm-1”

  Wypij 等 - 2022 - Novel Antibacterial, Cytotoxic and Catalytic Activ DOI: 10.4014/jmb.2205.05006
• pārliecība 0,9

  “Explicit assignment: disorder (D-band).”

  Optimization and Characterization of Mesoporous Sulfonated Carbon Catalyst and Its Application in Modeling and Optimization of Acetin Production DOI: 10.3390/molecules25225221
• pārliecība 0,9

  “Explicitly assigned as D band.”

  Extracellular electron uptake from carbon-based π electron surface-donors: oxidation of graphite sheets by Sulfobacillus thermosulfidooxidans probed by Raman and FTIR spectroscopies DOI: 10.1039/c9ra03628h