Bronsted acid site — FTIR absorption peaks and assignments
These are the characteristic FTIR wavenumbers where Bronsted acid site tends to absorb, compiled from published literature and ranked by supporting evidence. Each assignment is traceable to a source (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 8 cited sources
Snabbt svar
Bronsted acid site is usually assigned by looking for a recurring cluster of characteristic peaks rather than one exact textbook number. The table below shows where the literature most often places this group in FTIR, ranked by accumulated evidence.
Characteristic FTIR peaks for Bronsted acid site
| Vågtal (cm⁻¹) | Stödjande fakta | Citerade källor | Högsta förtroende |
|---|---|---|---|
| 1540 | 4 | 4 | 1,0 |
| 1545 | 4 | 2 | 1,0 |
| 1637 | 2 | 2 | 1,0 |
| 1533 | 1 | 1 | 1,0 |
| 402 | 1 | 1 | 1,0 |
| 1446 | 1 | 1 | 1,0 |
| 3630 | 1 | 1 | 1,0 |
| 3655 | 1 | 1 | 1,0 |
| 2159 | 1 | 1 | 1,0 |
| 2299 | 1 | 1 | 1,0 |
| 2170 | 1 | 1 | 1,0 |
| 3660 | 1 | 1 | 1,0 |
| 3610 | 1 | 1 | 1,0 |
| 1444 | 1 | 1 | 1,0 |
| 1400 | 1 | 1 | 1,0 |
| 2175 | 1 | 1 | 1,0 |
| 3590 | 1 | 1 | 1,0 |
| 3745 | 1 | 1 | 1,0 |
| 2297 | 1 | 1 | 1,0 |
| 2150 | 1 | 1 | 1,0 |
| 1425 | 1 | 1 | 1,0 |
| 2172 | 1 | 1 | 1,0 |
| 1640 | 1 | 1 | 1,0 |
| 673 | 1 | 1 | 1,0 |
| 1245 | 1 | 1 | 1,0 |
| 1680 | 1 | 1 | 1,0 |
| 1550 | 1 | 1 | 0,9 |
| 2277 | 1 | 1 | 0,9 |
| 1535 | 1 | 0 | 1,0 |
| 1445 | 1 | 0 | 1,0 |
Showing the 30 best-supported peaks of 32 total for Bronsted acid site.
Spektrumlogik
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Verifieringsråd
Använd DSC, GC-MS eller TGA när flera materialfamiljer har liknande band eller när blandningseffekter gör FTIR-tilldelningen osäker.
Litteratur bakom dessa identifieringar
-
1680 cm⁻¹ förtroende 1,0
“Meanwhile, the peaks at 1467 4+)),20 s(NH while the two peaks at 3161 Brønsted acid sites ((cid:238) cm-1 weaken and remain until 473 K before and 1680 cm-1 and 3246 are attributed to s(NH 3) coordinated to Lewis (cid:238) cm-1 is disappear”
Pena 等 - 2004 - Identification of surface species on titania-suppo DOI: 10.1021/jp0313122 -
1640 cm⁻¹ förtroende 1,0
“However, no significant peak at 1545 cm-1 nor at 1640 cm-1, corresponding to the vibrations characteristic of the pyridinium ions, formed in the presence of Brønsted acid sites, are clearly observed.”
TiO2 Catalyzed Dihydroxyacetone (DHA) Conversion in Water: Evidence That This Model Reaction Probes Basicity in Addition to Acidity DOI: 10.3390/molecules27238172 -
1540 cm⁻¹ förtroende 1,0
“The typical bands resulting from pyridine adsorbed on Brønsted acid sites sites (PyH+) are observed around 1540 cm-1, while the bands from pyridine interacting with Lewis (PyH+ cm-1, ) are observed around 1540 while the bands from pyridine”
Bellmann 等 - 2020 - Determining the Location of Co2+ in Zeolites by UV DOI: 10.3390/catal10010123 -
1425 cm⁻¹ förtroende 1,0
“They revealed that the number of cm-1) Brønsted acid sites (band near 1425 was strongly increased.”
Unravelling water effects on solid acidic catalysts: Case study of TiO 2 /SiO 2 for dehydration of isobutanol DOI: 10.1016/j.jcat.2016.12.007 -
2150 cm⁻¹ förtroende 1,0
“The CO adsorption NMR spectroscopy is a reliable method for the quantification centers.11,47 15Nexperiments shown on the previous section do not give any of Lewis and Brønsted acid The adsorption of indication for these Brønsted acid sites,”
Comparative study of the strongest solid Lewis acids known: ACF and HS-AlF3 DOI: 10.1039/c8dt03279c -
2297 cm⁻¹ förtroende 1,0
“LLM confirmed rule peak-group candidate”
New synthesis routes and catalytic applications of ferrierite crystals. Part 1: 1,8-Diaminooctane as a new OSDA DOI: 10.1016/j.micromeso.2019.109987 -
3590 cm⁻¹ förtroende 1,0
“In the hierarchical catalysts Upon CO interaction at low temperature, the band due to cm-1 (80H and 30H), the band at 3590 is less evident due to the cm-1) Si(OH)Al Brønsted acid sites (3615 present in all catalysts”
Erigoni 等 - 2016 - Creating Accessible Active Sites in Hierarchical M DOI: 10.1038/ncomms9633. -
1400 cm⁻¹ förtroende 1,0
“Under visible irradiation, a 3 cm-1 new broad band appeared at 1400 belonging to the asymmetric vibration of adsorbed 4+) NH 3on the Brønsted acid sites (formation of NH (Strömet al.”
Hamoud 等 - 2019 - Photo-assisted SCR over highly dispersed silver su DOI: 10.1016/j.apcatb.2019.02.022
See Bronsted acid site in your own spectrum
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