What absorbs at 3697 cm⁻¹ in an FTIR spectrum?
A band near 3697 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 7 cited sources
Ateb cyflym
A band near 3697 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.
Aseiniadau grŵp swyddogaethol posibl
| Grŵp swyddogaethol | Ffeithiau ategol | Ffynonellau a ddyfynnwyd | Hyder uchaf |
|---|---|---|---|
| Hydroxyl (O-H) | 7 | 7 | 1.0 |
| Silicon (Si) | 1 | 1 | 1.0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1.0 |
Mae＇r safle＇n adlewyrchu tystiolaeth llenyddiaeth gronnwyd, nid rheol awdurdodol sengl. Cadarnhewch bob amser yn erbyn eich cyd-destun sampl.
Deunyddiau posibl
| Deunydd | Copaon ategol | Grwpiau sy＇n gorgyffwrdd | Ffynonellau a ddyfynnwyd |
|---|---|---|---|
| silica | 3697, 1100, 1080 | Silicon-oxygen (Si-O), Silicon (Si), Hydroxyl (O-H) | 1 |
| montmorillonite | 3697, 1637, 523 | Hydroxyl (O-H), Silicon-oxygen (Si-O), Silicon (Si) | 1 |
| kaolinite | 3697, 3696, 693 | Hydroxyl (O-H), Silicon-oxygen (Si-O), Silicon (Si) | 1 |
Mae deunyddiau＇n cael eu dangos dim ond pan fydd yr un gronfa lenyddiaeth yn cefnogi＇r band hwn ac o leiaf un brig nodweddiadol ychwanegol.
Rhesymeg sbectrwm
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 3697 cm⁻¹ is usually not enough for material identification by itself.
Defnydd yn y byd go iawn
Mae＇r math hwn o ymholiad yn gyffredin mewn adnabod polymer, sgrinio plastig anhysbys, datrys problemau QC, dilysu deunydd wedi＇i ailgylchu, ac adolygiad o aseiniad copa wedi＇i gefnogi gan lenyddiaeth.
Camgymeriadau cyffredin
- Trin un band ynysig fel prawf o ddeunydd heb wirio o leiaf un neu ddau gopa cefnogol.
- Anwybyddu gorgyffwrdd: gall grwpiau swyddogaethol lluosog gyfrannu ger yr un rhif ton.
- Hepgor dilysu pan fo ychwanegion, cymysgeddau, ocsideiddio, neu halogiad yn gallu ystumio＇r sbectrwm.
Cyngor dilysu
Pan fo amwysedd yn parhau, dilyswch y rhagdybiaeth gyda DSC, GC-MS, neu TGA, yn enwedig ar gyfer cymysgeddau, samplau dirywiedig, a pholymerau llawn.
Llenyddiaeth y tu ôl i＇r aseiniadau hyn
-
Hydroxyl (O-H) hyder 1.0
“Pt/silicad 3697/3676 O-H stretch of isolated silanol 3673 3740 silicaf 3515 3535/3509 O-H stretch of silanol H-bonded to 3510”
Leewis 等 - 2006 - Ammonia adsorption and decomposition on silica sup DOI: 10.1016/j.apsusc.2005.12.115 -
Hydroxyl (O-H) hyder 1.0
“mixed-layered phases in the XRD patterns of the untreated samples reflection O-H-stretching was manifested by a strong and broad between 13Å and The soil clay FTIR spectra contain bands at 3697cm-1 cm-1 and 3653 assigned to kaolinite in add”
The nature of interlayering in clays from a podzol (Spodosol) from the Tatra Mountains, Poland DOI: 10.1016/j.geoderma.2010.10.013 -
Hydroxyl (O-H) hyder 1.0
“The extracted strongest absorption band at ~3697cm-1 were assigned to OH-stretching in the octahedral at solution was then separated from the clay fraction residue by sheet of aluminous minerals such as illite or kaolinite (Farmer centrifug”
Characterisation of the hydroxy-interlayered vermiculite from the weathering of illite in Jiujiang red earth sediments DOI: 10.1071/SR14014 -
Hydroxyl (O-H) hyder 1.0
“(cm-1) Assignments Wavenumber 3697 O-H stretching”
Caccamo 等 - 2020 - Self-Assembly Processes in Hydrated Montmorillonit DOI: 10.3390/ma13051100 -
Hydroxyl (O-H) hyder 1.0
“LLM confirmed rule peak-group candidate”
Negrao 等 - 2021 - Mineralogical Appraisal of Bauxite Overburdens fro DOI: 10.3390/min11070677 -
Hydroxyl (O-H) hyder 1.0
“The major cm-1 band at 3697.36 is due to the antisymmetric stretching vibration of the O-H band [18].”
Preparation of Mg(OH)2/Calcined Fly Ash Nanocomposite for Removal of Heavy Metals from Aqueous Acidic Solutions DOI: 10.3390/ma13204621 -
Hydroxyl (O-H) hyder 0.9
“Stretch bands of OH group characteristic of kaolinite.”
Hildebrando 等 - 2014 - Synthesis and Characterization of Zeolite NaP Usin DOI: 10.1590/S1516-14392014005000035
Oes gennych sbectrwm gyda＇r band hwn?
Llwythwch eich sbectrwm FTIR i fyny a chael adroddiad dehongli llawn — aseiniadau brig gyda chyfeiriadau llenyddiaeth, cyfateb llyfrgell, a chadwyn dystiolaeth â gradd hyder — mewn eiliadau.