What absorbs at 770 cm⁻¹ in an FTIR spectrum?
A band near 770 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 6 cited sources
Возможные назначения функциональных групп
| Функциональная группа | Подтверждающие факты | Цитируемые источники | Максимальная достоверность |
|---|---|---|---|
| Carbohydrate | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Urethane | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 0 | 1,0 |
Ранжирование отражает накопленные литературные данные, а не единственное авторитетное правило. Всегда проверяйте в контексте вашего образца.
Литература, лежащая в основе этих назначений
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достоверность 1,0
“O-O the shoulder at 770 can be assigned to the stretching support to the latter "nucleophilic attack mechanism", as Ti-18O-18O-Ti.”
Nakamura 和 Nakato - 2004 - Primary intermediates of oxygen photoevolution rea DOI: 10.1021/ja0388764CCC -
Hydroxyl (O-H) достоверность 1,0
“Obtained Wavenumber Reference Wavenumber Functional Group/Fingerprint ObtainedWavenumber ReferenceWavenumber FunctionalGroup/Fingerprint cm-1 cm-1 2965.11 ±3000 (Strong & Board) -COOH (O-H Stretching) 2965.11cm-1 ±3000cm-1 -COOH(O-HStretchi”
Validation of the Developed Zero-Order Infrared Spectrophotometry Method for Qualitative and Quantitative Analyses of Tranexamic Acid in Marketed Tablets DOI: 10.3390/molecules26226985 -
Urethane достоверность 1,0
“The peak at 770 is attributed to the bending vibration peak in vibration peak in the carbamate formed by the reaction.”
The Effect of Glycidyl Azide Polymer Grafted Tetrafunctional Isocyanate on Polytriazole Polyethylene Oxide-Tetrahydrofuran Elastomer and its Propellant Properties DOI: 10.3390/polym12020278 -
Aromatic ring достоверность 1,0
“LLM confirmed rule peak-group candidate”
Mahapatra 等 - 2023 - Chemically activated carbon preparation from natur DOI: 10.2166/wst.2023.004 -
Carboxyl (COOH) достоверность 1,0
“The changes on the bands of reactive groups may also 895cm-1, 770cm-1 and Additionally, new peaks appeared at be explained by the protonation of reactive groups: carboxylate groups 467cm-1 Cr]O, CreO corresponding to the stretching vibratio”
Mo 等 - 2019 - New highly-percolating alginate-PEI membranes for DOI: 10.1016/j.carbpol.2019.115177 -
Carbohydrate достоверность 1,0
“770 are bands associated with the oscillations of the (δ anomeric region of carbohydrates or deformation C-H (C-H)).”
Samborska 等 - 2018 - Membrane Processing in the Sustainable Production DOI: 10.3390/app8071082
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