What absorbs at 2840 cm⁻¹ in an FTIR spectrum?
A band near 2840 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
Gán nhóm chức có thể
| Nhóm chức | Sự kiện hỗ trợ | Nguồn tham khảo | Độ tin cậy cao nhất |
|---|---|---|---|
| Alkyl C-H | 8 | 8 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
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Tài liệu tham khảo đằng sau các gán này
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Methoxy (OCH3) độ tin cậy 1,0
“Specifically, the methoxy bands (2840 and precise calculation of the LO modes and is beyond the cm(cid:2)1) 820 scope were no longer present after 16 days (Fig.”
Structural studies of alkoxysilyl-functionalised ionic liquid and its application in a hybrid electrochromic device DOI: 10.1016/j.materresbull.2012.08.036 -
Alkyl C-H độ tin cậy 1,0
“On the shortwave shoulder of the broad OH peak, two peaks of C-H We believe that this region division better suits the 2840cm-1 stretching vibrations at 2930 (asymmetric) and studied soil samples.”
FTIR photoacoustic spectroscopy for identification and assessment of soil components_ Chernozems and their size fractions DOI: 10.1016/j.pacs.2020.100162 -
Alkyl C-H độ tin cậy 1,0
“The stretching C-H alkane group was represented by the medium peak at 2840 cm-1.”
Bio-Fabrication of ZnONPs from Alkalescent Nucleoside Antibiotic to Control Rice Blast: Impact on Pathogen (Magnaporthe grisea) and Host (Rice) DOI: 10.3390/ijms24032778 -
Alkyl C-H độ tin cậy 1,0
“The peaks observed at 2840 and 2920 are respectively related to the symmetric and antisymmetric stretching vibrational of C-H from alkyl groups.”
Awada 和 Daneault - 2015 - Chemical Modification of Poly(Vinyl Alcohol) in Wa DOI: 10.3390/app5040840 -
Alkyl C-H độ tin cậy 1,0
“LLM confirmed rule peak-group candidate”
Synthesis of New Homopiperazine-1.4-Diium Tetrachloridromercurate (II) Monohydrate (C5H14N2)[HgCl4]H2O, Crystal Structure, Hirshfeld Surface, Spectroscopy, Thermal Analysis, Antioxidant Activity, Electric and Dielectric Behavior DOI: 10.3390/cryst12040486 -
Alkyl C-H độ tin cậy 1,0
“- 626.8 626.8 2950cm(cid:1)1 C-H corresponding to stretches of tween 2840 and - 657.7 657.7”
New approaches to identification and characterization of tioconazole in raw material and in pharmaceutical dosage forms DOI: 10.1016/j.jpha.2018.11.006 -
Alkyl C-H độ tin cậy 1,0
“Results and Discussion with the spectrum of DTAT, two new peaks located at 2931 cm-1 and 2840 cm-1 (C-H of -CH2-) appeared and one peak at 848 cm-1 (C-Cl) disappeared in the PETAT spectrum, showing that a reaction had occurred between DTAT”
The Effects of a Macromolecular Charring Agent with Gas Phase and Condense Phase Synergistic Flame Retardant Capability on the Properties of PP/IFR Composites DOI: 10.3390/ma11010111 -
Water (H2O) độ tin cậy 1,0
“Bands at 2840 cm-1 can be assigned to the vibration of moisture adsorption on the material's surface [20,33].”
A Highly Selective Novel Green Cation Exchange Membrane Doped with Ceramic Nanotubes Material for Direct Methanol Fuel Cells DOI: 10.3390/en14185664
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