What absorbs at 3456 cm⁻¹ in an FTIR spectrum?
A band near 3456 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 5 cited sources
可能的官能团归属
| 官能团 | 支持性事实 | 引用来源 | 最高置信度 |
|---|---|---|---|
| Hydroxyl (O-H) | 4 | 4 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
排名反映了累积的文献证据，而非单一的权威规则。请始终对照您的样品背景进行确认。
这些分配背后的文献
-
Hydroxyl (O-H) 置信度 1.0
“The near-IR broad band centered at 3456 is related to vibrational mode of OH, water and 4.3.”
Ibrahim 等 - 2021 - Gamma-rays interactions on the spectral properties DOI: 10.21608/EJCHEM.2021.55869.3186 -
Alkyl C-H 置信度 1.0
“For SOHE, the cm-1 1.40-3.00 ppm (peak 2) and peaks at around ppm (peaks 8, 5, characteristic absorption peak around 3456 had cm-1 and 9) corresponded to protons of methylene.”
Chen 等 - 2020 - Synthesis of a Novel Bio-Oil-Based Hyperbranched E DOI: 10.1021/acsomega.0c00119 -
N h 置信度 1.0
“LLM confirmed rule peak-group candidate”
Cossolin 等 - 2019 - DOI: 10.4136/1980-993X -
Hydroxyl (O-H) 置信度 1.0
“Each cm-1 spectrum consists of two OH vibration bands: one with the main absorption with E//a at 3456 cm-1 plus a shoulder at the low energy side and one at 3542 with an isotropic absorption behavior.”
Feenstra 等 - 2009 - Hydrogen zoning in zinc-bearing staurolite from a DOI: 10.2138/am.2009.3107 -
Hydroxyl (O-H) 置信度 1.0
“1E, the absorption band at 3456 which attributes to the cm-1 stretching vibrations of -OH groups in the PXDDA, broadened and underwent a small shift to 3392 for polydopamine-coated PXDDA.”
Immobilization of FGF on Poly(xylitol dodecanedioic Acid) Polymer for Tissue Regeneration DOI: 10.1038/s41598-020-67261-6
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