What absorbs at 1473 cm⁻¹ in an FTIR spectrum?
A band near 1473 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 1473 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 |
|---|---|---|---|
| Alkene (C=C) | 4 | 3 | 1,0 |
| Amide | 3 | 3 | 1,0 |
| Alkyl C-H | 2 | 2 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| C n single bond | 2 | 2 | 1,0 |
| Carboxyl (COOH) | 2 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Carbonate | 1 | 1 | 0,9 |
Ранжирование отражает накопленные литературные данные, а не единственное авторитетное правило. Всегда проверяйте в контексте вашего образца.
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 1473 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
-
достоверность 1,0
“1473cm-1 represents vibrations of the oxygen octahedra with 1623cm-1 Transmittance(arb.”
Ghosh 等 - 2013 - Vibrational Modes And Electronic Structure Of Sr2G DOI: 10.1063/1.4791287 -
Alkyl C-H достоверность 1,0
“sym(C-H) 3-N+.26 chain25 and of CH methylene (cid:238) In the surfactant mixture (Figure 2a, dashed line), the cm-1 are attributed to peaks (doublet) at 1473 and 1465 2scissoringmodeandaccountforaparallelpacking theCH of the trans methylene”
Nikoobakht 和 El-Sayed - 2001 - Evidence for bilayer assembly of cationic surfacta DOI: 10.1021/la010530o -
Amide достоверность 1,0
“obtainedat1462cm(cid:1)1[Fig.3(b)]andatthesecondofthestrong wavenumber of the Amide II band and which has been loosely Access cm(cid:1)1 b-sheets.5 paraffin signicant attributed to peaks, 1473 [Fig.”
Al Jedani 等 - 2020 - A de-waxing methodology for scanning probe microsc DOI: 10.1039/d0ay00965b -
достоверность 1,0
“cm1 cm1 (alone) appeared at 3358 (stretching of N-H bond), 3087 and 3094 (stretching of C-H and O-H cm1 bonds), 1772 and 1662 (stretching of C = C, C = O and C = N bonds and bending of N-H bond) and cm1 1473 and 1364 (stretching and bending”
Ali 等 - 2023 - Nitazoxanide and azithromycin for the early treatm DOI: 10.21203/rs.3.rs-1745239/v1 -
Alkene (C=C) достоверность 1,0
“The two medium bands at 1539 cm-1 were assigned to the pyridine skeletal stretching -2.7 formation of the desired product are the broad signal to ppm associated with the NH and two medium bands at 1539 cm-1 and 1473 cm-1 correspond to C=C a”
Synthesis of a New Co Metal–Organic Framework Assembled from 5,10,15,20-Tetrakis((pyridin-4-yl) phenyl)porphyrin “Co-MTPhPyP” and Its Application to the Removal of Heavy Metal Ions DOI: 10.3390/molecules28041816 -
Amide достоверность 1,0
“C=O pyranose ring (2892 stretching, NH-Ac (1644 and C-N stretching (1473 HA showed cm-1);”
Dual-responsive (pH/temperature) Pluronic F-127 hydrogel drug delivery system for textile-based transdermal therapy DOI: 10.1038/s41598-019-48254-6 -
Phosphate (PO4) достоверность 1,0
“(cm-1 PZ-HEMA-1 : 6 ) were 2947 (CH2), 1720 (C=O), 1635 istic IR bands PZ-HEMA-LA (C=C), 1473 (CO-O), 1033 (P-O-C), 1168 (phosphazene 31 1 (𝛿 P-NMR peaks: 1.5 = ppm);”
Martinez Ceballos 等 - 2013 - Synthesis and Characterization of Polyphosphazenes DOI: 10.1155/2013/645869 -
Alkyl C-H достоверность 1,0
“- 1 overlap with the spectrum of paraffin wax, as highlighted by the presence of bands at 2915 and 2848 cm (CH - 1 - 1 - 1 stretching), 1473 cm (CH bending), 1380 cm (CH bending), 728 and 719 cm (CH rocking) [24-26].”
Pianorsi 等 - 2017 - Organogels for the cleaning of artifacts DOI: 10.1515/pac-2016-0908
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