What absorbs at 3281 cm⁻¹ in an FTIR spectrum?
A band near 3281 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 7 cited sources
可能的官能基指派
| 官能基 | 支持事實 | 引用來源 | 最高信心 |
|---|---|---|---|
| Hydroxyl (O-H) | 4 | 3 | 0.95 |
| N h | 3 | 3 | 0.9 |
| Amide | 1 | 1 | 0.9 |
排名反映累積的文獻證據，而非單一權威規則。請務必根據您的樣品背景進行確認。
這些指派背後的文獻
-
Hydroxyl (O-H) 信心 0.95
“Explicit assignment: 'absorption maximum at 3281 indicates the presence of an OH group'”
Egle 等 - 2022 - Injectable Platelet-Rich Fibrin as a Drug Carrier DOI: 10.3390/ijms23137407 -
Hydroxyl (O-H) 信心 0.9
“Text mentions 'bands ranging from 3525 to 3281' related to stretch of -OH.”
Giraldo 等 - 2022 - Development of a Novel Green Bio-Nanofluid from Sa DOI: 10.3390/pr10061057 -
信心 0.9
“NH stretching vibration of sulphonamide in pure furosemide.”
Kovacs 等 - 2020 - Influence of Aqueous Solubility-Enhancing Excipien DOI: 10.3390/pharmaceutics12040385 -
N h 信心 0.9
“From snippet: absorption bands at ʋ 3281-3381, 3442-3462 (NH)”
Mumtaz 等 - 2018 - SYNTHESIS, CHARACTERIZATION AND UREASE INHIBITION DOI: 10.1016/j.ejmech.2011.09.009. -
Hydroxyl (O-H) 信心 0.9
“explicit assignment”
Popa 等 - 2022 - Influence of Convective and Vacuum-Type Drying on DOI: 10.3390/molecules27134063 -
N h 信心 0.9
“N-H stretching”
Rogulska 等 - 2013 - New thermoplastic poly(thiourethane-urethane) elas DOI: 10.1007/s10973-013-3007-5 -
N h 信心 0.9
“Text: 'broad absorption at 3281 cm-1 (amide A) was derived from stretching of the -NH group'”
Singh 等 - 2021 - Effect of Psyllium (Plantago ovata Forks) Husk on DOI: 10.3390/foods10061181
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