What absorbs at 682 cm⁻¹ in an FTIR spectrum?
A band near 682 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 682 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 |
|---|---|---|---|
| Chlorine | 3 | 3 | 1,0 |
| Metal oxygen | 2 | 2 | 1,0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1,0 |
| Silicon (Si) | 2 | 2 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Styrene | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| N n bond | 1 | 1 | 1,0 |
Rangs atspoguļo uzkrātos literatūras pierādījumus, nevis vienu autoritatīvu noteikumu. Vienmēr apstipriniet atbilstoši parauga kontekstam.
Iespējamie materiāli
| Materiāls | Atbalstošie pīķi | Pārklājošās grupas | Citētie avoti |
|---|---|---|---|
| iron oxide | 682, 1130, 891 | Metal oxygen | 1 |
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 682 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
-
N n bond pārliecība 1,0
“(n n cm-1 845 and 971 and are due to stretching vibrations of SiO and 3) and bands at 486 and N 4 1 A (n n cm-1 682 are due to bending vibrations of O-Si-O and 4) [30, 31].”
Driving the photoluminescent and structural properties of X2-Y2SiO5 by varying the dopant Dy3+ concentration towards cool wLED applications DOI: 10.1016/j.solidstatesciences.2017.05.008 -
Silicon (Si) pārliecība 1,0
“and the bands at 786.03 cm-1, 682.05 cm-1, and 509.46 cm-1 represent Si-O Quartz, Si-O-Si bending, and Fe-O Fe2O3 Si-O-Al stretching, respectively.”
Foliar Application of Nanoclay Promotes Potato (Solanum tuberosum L.) Growth and Induces Systemic Resistance against Potato Virus Y DOI: 10.3390/v14102151 -
pārliecība 1,0
“cm-1 cm-1 cm-1 occur at 1593.5 (NH scissoring vibration), 1503.1 (aromatic ring stretching), 1334.2 2 (SO2 asymmetric stretching), 1144.6 cm-1 (SO2 symmetric stretching) and 681.8 cm-1 (C-Cl stretching).”
Garbacz 和 Wesolowski - 2018 - DSC, FTIR and Raman Spectroscopy Coupled with Mult DOI: 10.3390/molecules23092136 -
Styrene pārliecība 1,0
“cm-1, + For St 10% L-M (Figure 3c) the signal intensity was lower, apart from the absorption band at 682 which was related to the decomposition of the unreacted styrene [16].”
Preparation, Thermal, and Mechanical Characterization of UV-Cured Polymer Biocomposites with Lignin DOI: 10.3390/polym12051159 -
pārliecība 1,0
“22%, which confirms strong binding between the oleic acid molecules and Fe 4 The third peak is at 682 °C, and the percentage of mass loss is about 2.5% which is attributed to the phase transition from Fe 3O to FeO, because FeO is thermodyna”
Synthesis, Surface Modification and Characterisation of Biocompatible Magnetic Iron Oxide Nanoparticles for Biomedical Applications DOI: 10.3390/molecules18077533 -
Ring structure pārliecība 1,0
“The peak at 177 cm-1 is with the highest intensity are 101, 177, 1144, 1456, and 2923 attributed to Zn-N bond vibrations, the peak at 682 cm-1 is attributed to imidazolate ring puckering vibrations, the peak at 1144 cm-1 is attributed to Zn”
Biocatalysts Synthesized with Lipase from Pseudomonas cepacia on Glycol-Modified ZIF-8: Characterization and Utilization in the Synthesis of Green Biodiesel DOI: 10.3390/molecules27175396 -
Metal oxygen pārliecība 1,0
“cm-1.36 αCD Figure S1, the peaks observed at m/z 681.56, 1135.96, and appeared at 1129 When, the UMB + inclusion αCD -O-H 1157.99 are related to the molecular ions, [UMB + + complex is formed, bond-stretching frequency of the cm-1, αCD resp”
Roy 等 - 2020 - Exploring the Inclusion Complex of a Drug (Umbelli DOI: 10.1021/acsomega.0c04716 -
pārliecība 1,0
“2 cm-1 cm-1 obtained for the data acquired from DSC or FTIR 681.8 (C-Cl stretching), 577.6 (O-H bending (Table 2).”
Principal component and cluster analyses as supporting tools for co-crystals detection DOI: 10.1007/s10973-017-6436-8
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