What absorbs at 1077 cm⁻¹ in an FTIR spectrum?
A band near 1077 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
Përgjigje e shpejtë
A band near 1077 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.
Caktime të mundshme të grupeve funksionale
| Grup funksional | Fakte mbështetëse | Burimet e cituara | Besueshmëri e lartë |
|---|---|---|---|
| Methacrylate | 12 | 12 | 1,0 |
| C-O single bond | 12 | 12 | 1,0 |
| Acetate | 12 | 12 | 1,0 |
| Methoxy (OCH3) | 11 | 11 | 1,0 |
| Silicon-oxygen (Si-O) | 5 | 5 | 1,0 |
| Hydroxyl (O-H) | 4 | 4 | 1,0 |
| Amide | 3 | 3 | 1,0 |
| Alkyl C-H | 3 | 3 | 1,0 |
| Phosphate (PO4) | 3 | 3 | 1,0 |
| Carbohydrate | 3 | 2 | 1,0 |
| Protein | 2 | 2 | 1,0 |
| Carboxyl (COOH) | 2 | 2 | 1,0 |
| Nucleic acid | 2 | 2 | 1,0 |
| Phosphorus | 2 | 2 | 1,0 |
| Silicon (Si) | 2 | 2 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Fatty acid | 1 | 1 | 1,0 |
| Amine primary | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| N-O bond | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Silanol (Si-OH) | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| S eq o | 1 | 1 | 1,0 |
| N n bond | 1 | 1 | 1,0 |
Renditja pasqyron provat e grumbulluara të literaturës, jo një rregull të vetëm autoritar. Gjithmonë konfirmoni në kontekstin e mostrës suaj.
Materialet e mundshme
| Material | Maja mbështetëse | Grupe të mbivendosura | Burimet e cituara |
|---|---|---|---|
| starch | 1077, 1650, 1540 | Methacrylate, Acetate, C-O single bond | 1 |
| citric acid | 1077, 1725, 1732 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| PLA | 1077, 1650, 1073 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
Materialet shfaqen vetëm kur i njëjti grup literature mbështet këtë brez dhe të paktën një pik karakteristik shtesë.
Logjika e spektrit
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 1077 cm⁻¹ is usually not enough for material identification by itself.
Përdorimi në botën reale
Ky lloj pyetjeje është i zakonshëm në identifikimin e polimereve, skriningun e plastikës së panjohur, zgjidhjen e problemeve të kontrollit të cilësisë, verifikimin e materialeve të ricikluara dhe rishikimin e caktimit të pikut të mbështetur nga literatura.
Gabimet e zakonshme
- Trajtimi i një brezi të izoluar si provë e një materiali pa kontrolluar të paktën një ose dy pika mbështetëse.
- Duke injoruar mbivendosjen: grupe të shumta funksionale mund të kontribuojnë afër të njëjtit numër valor.
- Kalimi i vërtetimit kur aditivët, përzierjet, oksidimi ose ndotja mund të shtrembërojnë spektrin.
Këshillë për verifikim
Kur mbetet paqartësi, verifiko hipotezën me DSC, GC-MS ose TGA, veçanërisht për përzierjet, mostrat e degraduara dhe polimerët e mbushur.
Literatura pas këtyre caktimeve
-
Acetate besueshmëri 1,0
“Finally, the cm-1 steep peak at (ix) 1077 (Figure 3) could be attributable to C-O stretching, which”
Characteristics of Plasticized Lithium Ion Conducting Green Polymer Blend Electrolytes Based on CS: Dextran with High Energy Density and Specific Capacitance DOI: 10.3390/polym13213613 -
Acetate besueshmëri 1,0
“While for corn starch extruded at 127 °C, 20% moisture content, and cm-1 1.5% of citric acid (CSE1) with 0.81 g/100 g of RS, the adsorption bands 1150 and 1077 are attributed to stretch C-O-H or C-O-R of saccharide.”
Optimization of an extrusion cooking process to increase formation of resistant starch from corn starch with addition of citric acid DOI: 10.1002/star.201900150. -
Silicon (Si) besueshmëri 1,0
“of the mineral host elements, the peaks at 670, 753, 960, and 96 0 250 500 750 1000 1250 1500 cm-1 1077 can be related to stretching vibrations associated Temperature/ΟC with a Si-O bond originated from donbassite and quartz impu-”
Parali 等 - 2015 - Dielectric behaviors at microwave frequencies and DOI: 10.1088/1674-1056/24/5/059101 -
Alkyl C-H besueshmëri 1,0
“FTIR spectra of starch typically demonstrates bands at 1100-900 (C-O-H Pre-proof cm-1 bending and stretch vibration), 1100-1150 (C-O, C-C and C-O-H stretching), 840 and cm-1 cm-1 1077 (CH 2-O-CH stretching vibration), 851 (skeletal stretchi”
Pourmohammadi 和 Abedi - 2020 - The effect of pre and post-ultrasonication on the DOI: 10.1016/j.ijbiomac.2020.06.205 -
Alkyl C-H besueshmëri 1,0
“In addition, the peak at 1077 was C-H bending (Bourtoom &”
Characteristics and properties of hydroxypropylated rice starch based biodegradable films DOI: 10.1016/j.foodhyd.2015.04.010 -
Acetate besueshmëri 1,0
“X-ray scatis cm(cid:2)1 C-N bending vibration, the band centered at 1258 to the tering measurements suggest the self-assembling of disordered article cm(cid:2)1 C-O stretching vibration and the sharp band at 1077 to the Article.”
Design of a fluorescent and clickable Ag38(SRN3)24 nanocluster platform: synthesis, modeling and self-assembling DOI: 10.1039/d1na00090j -
N n bond besueshmëri 1,0
“Asad S, Amoozegar M, Pourbabaee AA, Sarbolouki M, Dastgheib S cm-1 cm-1 1238 and peaks at 1077 and 1036 are assigned (2007) Decolorization of textile azo dyes by newly isolated to R-SO groups and -S=O (Sanmuga Priya et al.”
Biodegradation and decolorization of azo dyes by adherent Staphylococcus lentus strain DOI: 10.1007/s13765-016-0169-4 -
Carboxyl (COOH) besueshmëri 1,0
“cm-1-which stretching as 1077 and the C-COO peak at 880 can be associated with CaCO 3 indicated by the peak at 2503 cm-1).”
Impact of the Fused Deposition (FDM) Printing Process on Polylactic Acid (PLA) Chemistry and Structure DOI: 10.3390/app7060579
Keni një spektër me këtë brez?
Ngarkoni spektrin tuaj FTIR dhe merrni një raport të plotë interpretimi — caktim i pikut me citime literaturë, përputhje biblioteke dhe një zinxhir provash të vlerësuar me besueshmëri — në sekonda.