What absorbs at 1777 cm⁻¹ in an FTIR spectrum?
A band near 1777 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
Atribuiri posibile ale grupelor funcționale
| Grup funcțional | Fapte suport | Surse citate | Încredere maximă |
|---|---|---|---|
| Carbonyl (C=O) | 4 | 4 | 1,0 |
| Carboxyl (COOH) | 2 | 2 | 1,0 |
| Amide | 2 | 2 | 1,0 |
| N-O bond | 1 | 1 | 1,0 |
| Anhydride | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Thiocarbonyl | 1 | 1 | 1,0 |
Clasamentul reflectă dovezile acumulate din literatură, nu o singură regulă autoritară. Confirmați întotdeauna în contextul mostrei dvs.
Literatura din spatele acestor atribuiri
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Amide încredere 1,0
“absorption (1720 and 1777 cm-1) and the C-N absorption at 1390 cm-1 are almost identical.”
Interpenetration Networked Polyimide–Epoxy Copolymer under Kinetic and Thermodynamic Control for Anticorrosion Coating DOI: 10.3390/polym15010243 -
Carbonyl (C=O) încredere 1,0
“Thus, the IR spectra of and show two strong absorption peaks becm-1, between 1777 and 1660 cm-1, which revealed the presence of two carbonyl groups.”
Synthesis and In Vitro Antimicrobial Evaluation of Photoactive Multi—Block Chalcone Conjugate Phthalimide and 1,8-Naphthalimide Novolacs DOI: 10.3390/polym13111859 -
Carboxyl (COOH) încredere 1,0
“cm-1) Identified CO O-H interactions.63 Materials via the Evolved Gas Analysis of SLI The observed (1777 and cm-1) bands were characteristic of vapor-phase (3576 wavenumber carboxylic acids and correlate very well with their respective (cm”
Assessment of the Thermal Degradation of Sodium Lauroyl Isethionate Using Predictive Isoconversional Kinetics and a Temperature-Resolved Analysis of Evolved Gases DOI: 10.1021/acs.iecr.9b00797 -
Acetate încredere 1,0
“cm-1 The SAM infrared spectra in the region between 1800 and 600 (Figure 1, upper) cm-1, showed a band at 1777 which can be tentatively assigned to C=O stretching, and the cm-1.”
S-Adenosyl-L-Methionine and Cu(II) Impact Green Plant Regeneration Efficiency DOI: 10.3390/cells11172700 -
Anhydride încredere 1,0
“The bands at 1777 and 1850 which correspond to the 132 symmetric and asymmetric stretching vibration of anhydride group, were taken as the 133 analytical reference bands for quantitative determination.”
Ortega-Toro 等 - 2016 - Enhancement of interfacial adhesion between starch DOI: 10.1016/j.carbpol.2016.03.070 -
Thiocarbonyl încredere 1,0
“The suggestion is supported by cm-1) ν appearance of one intense band for the asC=C=S vibration of S=C=C(H)CH (1777.0 3 cm-1, 2N-C≡N ν ν and for the asNH and sNH vibrations of H (3466.0 and 3314.0 respec2”
Structure, Spectra and Photochemistry of 2-Amino-4-Methylthiazole: FTIR Matrix Isolation and Theoretical Studies DOI: 10.3390/molecules27123897 -
Alkyl C-H încredere 1,0
“For all cm-1, cm-1 cmmembranes, the typical polyimide peaks at 2957 2862 (both C-H stretch aliphatic), 1777”
Thur 等 - 2019 - Bipyridine-based UiO-67 as novel filler in mixed-m DOI: 10.1016/j.progpolymsci.2008.12.004. -
încredere 1,0
“This (3.8 and was much lower than that under 2 cm-1)54 Fe(III)-NO might be why the reaction between NO and CO did not occur and the bands assignable to (1820, 1777 cm-1) on NiFe 2O 4.”
Ueda 等 - 2017 - Investigation of Reaction Mechanism of NO-C3H6-CO- DOI: 10.1021/acsomega.7b00165
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