What absorbs at 1645 cm⁻¹ in an FTIR spectrum?
A band near 1645 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
Възможни определяния на функционални групи
| Функционална група | Подкрепящи факти | Цитирани източници | Най-висока достоверност |
|---|---|---|---|
| Amide | 18 | 16 | 1,0 |
| Carbonyl (C=O) | 8 | 8 | 0,9 |
| Water (H2O) | 4 | 4 | 0,9 |
| Hydroxyl (O-H) | 3 | 3 | 1,0 |
| Protein random coil | 3 | 3 | 0,9 |
| N h | 3 | 3 | 0,9 |
| Carboxyl (COOH) | 2 | 2 | 0,9 |
| Silanol (Si-OH) | 1 | 1 | 0,9 |
| C=n | 1 | 1 | 0,9 |
| Protein | 1 | 1 | 0,8 |
| Hydrogen bond | 1 | 1 | 0,7 |
Класирането отразява натрупаните литературни доказателства, а не единично авторитетно правило. Винаги потвърждавайте спрямо контекста на вашата проба.
Литература зад тези определяния
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Hydroxyl (O-H) достоверност 1,0
“Explicit assignment in text”
Ghamry 和 Abdelmonem - 2022 - Adsorption of Co-60 and Eu154+152 Using Graft Copo DOI: 10.1007/s10924-022-02446-w -
Amide достоверност 1,0
“Assigned to amide I (C=O stretch).”
Luo 等 - 2019 - A Mechanism for the Adsorption of 2-(Hexadecanoyla DOI: 10.3390/min9010015 -
Hydroxyl (O-H) достоверност 1,0
“Explicit assignment in text”
Meng 等 - 2021 - Effects of load types and critical molar ratios on DOI: 10.1515/rams-2021-0019 -
Amide достоверност 0,95
“Explicit assignment: 'the amide I band maximum was at 1645 cm-1'”
Chaber 等 - 2021 - A Preliminary Study of FTIR Spectroscopy as a Pote DOI: 10.3390/molecules -
Amide достоверност 0,95
“Explicit assignment: 'distinctive peak at around 1645 which is evidence that the polymerization reaction... carbamate linkage (NH(CO))'”
Taka 等 - 2021 - Nanobiocomposite Polymer as a Filter Nanosponge fo DOI: 10.3390/molecules26133992 -
Amide достоверност 0,9
“Text: 'amide I band at 1645'”
Coopman 等 - 2017 - Glycation in human fingernail clippings using ATR- DOI: 10.1016/j.clinbiochem.2016.09.001 -
Carboxyl (COOH) достоверност 0,9
“Peak after Pb2+ binding.”
Schiewer 和 Balaria - 2009 - Biosorption of Pb2+ by original and protonated cit DOI: 10.1016/j.cej.2008.05.034 -
Amide достоверност 0,9
“Text: 'bands near 1645 assigned to amide I of protein and water molecule'.”
Xu 等 - 2005 - Distinguishing malignant from normal stomach tissu DOI: 10.1360/04yb0135
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