What absorbs at 2015 cm⁻¹ in an FTIR spectrum?
A band near 2015 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
Быстрый ответ
A band near 2015 cm⁻¹ is usually interpreted by checking which functional groups repeatedly co-occur there in the literature, then confirming at least one or two additional peaks in the same sample. This page ranks those assignments by accumulated evidence rather than by a single fixed textbook rule.
Возможные назначения функциональных групп
| Функциональная группа | Подтверждающие факты | Цитируемые источники | Максимальная достоверность |
|---|---|---|---|
| Amide | 5 | 5 | 1,0 |
| N h | 4 | 4 | 1,0 |
| Methacrylate | 4 | 4 | 1,0 |
| Acetate | 4 | 4 | 1,0 |
| Methoxy (OCH3) | 3 | 3 | 1,0 |
| C-O single bond | 3 | 3 | 1,0 |
| Carbonyl (C=O) | 2 | 2 | 1,0 |
| Alkyl C-H | 2 | 2 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| Fatty acid | 1 | 1 | 1,0 |
Ранжирование отражает накопленные литературные данные, а не единственное авторитетное правило. Всегда проверяйте в контексте вашего образца.
Возможные материалы
| Материал | Поддерживающие пики | Перекрывающиеся группы | Цитируемые источники |
|---|---|---|---|
| PVA | 2015, 1660, 2930 | Acetate, Methacrylate, Amide | 1 |
| chitosan | 2015, 1650, 1655 | Amide, Acetate, Methacrylate | 1 |
| collagen | 2015, 1408, 1660 | Amide, Methacrylate, Acetate | 1 |
Материалы отображаются только при поддержке данной полосы и хотя бы одного дополнительного характеристического пика из того же литературного пула.
Логика спектра
This band becomes meaningful only when read with its neighboring peaks. In practice, analysts first look at the assignments above, then check whether the same sample also shows other peaks expected for the same structural motif. A lone band near 2015 cm⁻¹ is usually not enough for material identification by itself.
Использование в реальных условиях
Такой тип запроса распространен при идентификации полимеров, скрининге неизвестных пластиков, устранении неполадок в контроле качества, проверке переработанных материалов и анализе отнесения пиков на основе литературы.
Распространенные ошибки
- Рассмотрение одной изолированной полосы как доказательства материала без проверки хотя бы одного или двух поддерживающих пиков.
- Игнорирование перекрытия: несколько функциональных групп могут вносить вклад вблизи одного и того же волнового числа.
- Пропуск проверки, когда добавки, смеси, окисление или загрязнение могут исказить спектр.
Рекомендации по проверке
Когда остается неоднозначность, проверьте гипотезу с помощью DSC, GC-MS или TGA, особенно для смесей, деградированных образцов и наполненных полимеров.
Литература, лежащая в основе этих назначений
-
Acetate достоверность 1,0
“Earlier 3 band of free amino acids.A broad band with the maxima at around 1698 researchers reported that the amorphous materials are unstable if stored - 1 and 1636 cm related to the bending vibrations of -OH from water at temperature close”
Exploiting maltodextrin and whey protein isolate macromolecules as carriers for the development of freeze dried honey powder DOI: 10.1016/j.carpta.2021.100040 -
Alkyl C-H достоверность 1,0
“C‚O C‚C CAO stretch or stretch, CH bend, stretch and 2015;”
Ge 等 - 2017 - Characteristics of activated carbon remove sulfur DOI: 10.1016/j.sjbs.2016.12.016 -
Amide достоверность 1,0
“When comparing the neat collagen membranes and those coated with chitosan and crosslinked with glutaraldehyde, the amide absorption bands Materials2015,8,7673-7689”
Chitosan-Coated Collagen Membranes Promote Chondrocyte Adhesion, Growth, and Interleukin-6 Secretion DOI: 10.3390/ma8115413 -
Amide достоверность 1,0
“The FTIR result may strongly suggests that BLGu BSG mixed system is a typical thermodynamic incompatible as amide I peak was increased in n 2015 the BLG-BSG mixed system comparing with the BLG, BSG in solution and gel states.”
Rafe 和 Razavi - 2015 - Effect of Thermal Treatment on Chemical Structure DOI: 10.1080/10942912.2014.999864 -
достоверность 1,0
“II IR for the aluminium surfaces" peak assignments 2015 January 05 based on refs [11, 12].”
STRALIN 和 HJERTBERG - 1992 - A FTIR STUDY OF INTERFACIAL INTERACTIONS BETWEEN E DOI: 10.1163/156856192X00584 -
C c single bond достоверность 1,0
“This peak is Materials 2015, 8 4905 related to the symmetric C-C stretching mode or stretching of the C-O of a portion of the chain where an intramolecular hydrogen bond is formed between two neighboring -OH groups that are on the same”
Poly(vinyl alcohol) Nanocomposites Reinforced with Bamboo Charcoal Nanoparticles: Mineralization Behavior and Characterization DOI: 10.3390/ma8084895 -
достоверность 1,0
“Biomass to the C = O stretching from the amide group while the peak cm-1 The mushroom chitosan-harvested biomass has EPA levels up at 1600 is the amine peak (Dimzon and Knepper, 2015).”
Effective Harvesting of Nannochloropsis Microalgae Using Mushroom Chitosan: A Pilot-Scale Study DOI: 10.3389/fbioe.2020.00771 -
Acetate достоверность 1,0
“It can be seen that, within a corresponds to C=O amide stretching from proteins, which is circledcluster, inmostcases, theT7samples lietotheleftrelativeto alsocalledtheamideIband(CeylanandGoldfarb,2015).Forlater theT14samples.Frombottomtoto”
ATR-FTIR spectroscopy combined with multivariate analysis as a rapid tool to infer the biochemical composition of Ulva laetevirens (Chlorophyta) DOI: 10.3389/fmars.2023.1154461
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