What absorbs at 1193 cm⁻¹ in an FTIR spectrum?

Ātra atbilde

A band near 1193 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 1193 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

• Acetate pārliecība 1,0

  “graph of polyurethane prepolymer were allocated cm-1 1193 assigned to -C-O, -C-C stretching.”

  Salem 和 Salama - 2020 - Developing a New Class of UV-curable Polyurethane DOI: 10.21608/ejchem.2019.14853.1906
• Phosphate (PO4) pārliecība 1,0

  “Moreover, the significant peak at 1193 cm-1 (medium) was assigned to the vibration of P=O bonds in the phosphate moieties.”

  Hung Kim Nguyen 等 - 2020 - Preparation of a Novel Flame Retardant Formulation DOI: 10.3390/ma13010054
• Acetate pārliecība 1,0

  “At 1193 the =C-O-C= stretch was detected.”

  Solubility Temperature Dependence of Bio-Based Levulinic Acid, Furfural, and Hydroxymethylfurfural in Water, Nonpolar, Polar Aprotic and Protic Solvents DOI: 10.3390/pr9060924
• pārliecība 1,0

  “As can be seen in Figure cm-1 after salicylaldoxime treatment, the N-Cu and O-Cu stretch vibrations are found at 1193 and 1152”

  Comparison of Adsorption of Phenol O-O and N-O Chelating Collectors at the Malachite/Water Interface in Flotation DOI: 10.3390/min7020020
• Acetate pārliecība 1,0

  “Charging 1296 C-O asymmetric stretching vibration in adsorbed or solvated DEC C-O asymmetric stretching vibration in adsorbed 1193 or solvated EC C-O symmetric stretching vibration in adsorbed 1084”

  Matsui 等 - 2015 - In-operando FTIR Spectroscopy for Composite Electr DOI: 10.5796/electrochemistry.83.874
• Acetate pārliecība 1,0

  “cm-1 4f and Pb 4f 5/2, respectively, and previous studies have reported that the typical binding energy of Moreover, the FTIR spectra of obtained MPS are shown in Figure 9, where the peak at 1718 7/2 cm-1 C=O corresponds to the adsorption o”

  Zhou 等 - 2019 - Scalable Fabrication of Metallopolymeric Superstru DOI: 10.3390/nano9071001