What absorbs at 955 cm⁻¹ in an FTIR spectrum?
A band near 955 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
Kiire vastus
A band near 955 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.
Võimalikud funktsionaalrühmade määramised
| Funktsionaalrühm | Toetavad faktid | Tsiteeritud allikad | Kõrgeim usaldusväärsus |
|---|---|---|---|
| Silicon-oxygen (Si-O) | 8 | 8 | 1,0 |
| Silicon (Si) | 8 | 7 | 1,0 |
| Hydroxyl (O-H) | 6 | 5 | 1,0 |
| Silanol (Si-OH) | 4 | 4 | 1,0 |
| Alkyl C-H | 3 | 3 | 1,0 |
| Methoxy (OCH3) | 3 | 2 | 1,0 |
| Methacrylate | 3 | 2 | 1,0 |
| C-O single bond | 3 | 2 | 1,0 |
| Acetate | 3 | 2 | 1,0 |
| C c single bond | 2 | 2 | 1,0 |
| Phosphate (PO4) | 2 | 2 | 1,0 |
| Alkene (C=C) | 2 | 2 | 1,0 |
| Siloxane (Si-O-Si) | 2 | 2 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| Methyl | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Nitrogen heterocycle | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 0 | 1,0 |
Reiting kajastab kogunenud kirjanduslikke tõendeid, mitte ühte autoriteetset reeglit. Kinnitage alati oma proovi kontekstis.
Võimalikud materjalid
| Materjal | Toetavad piigid | Kattuvad rühmad | Tsiteeritud allikad |
|---|---|---|---|
| silica | 955, 1100, 1080 | Silicon-oxygen (Si-O), Silicon (Si), Hydroxyl (O-H) | 2 |
| MWCNT | 955, 2876, 1430 | Hydroxyl (O-H) | 1 |
Materjale kuvatakse ainult siis, kui sama kirjanduse kogum toetab seda riba ja vähemalt ühte täiendavat iseloomulikku piiki.
Spektri loogika
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 955 cm⁻¹ is usually not enough for material identification by itself.
Reaalse maailma kasutus
Seda tüüpi päring on tavaline polümeeri tuvastamisel, tundmatu plasti sõeluuringul, kvaliteedikontrolli probleemide lahendamisel, ringlussevõetud materjali kontrollimisel ja kirjandusel põhineval piirkinnituste ülevaatel.
Levinud vead
- Ühe isoleeritud riba käsitlemine materjali tõendina ilma vähemalt ühte või kahte toetavat piiki kontrollimata.
- Ülekattumise ignoreerimine: mitu funktsionaalrühma võivad anda panuse sama lainearvu lähedal.
- Valideerimise vahelejätmine, kui lisandid, segud, oksüdatsioon või saastumine võivad spektrit moonutada.
Kontrollimise nõuanne
Kui ebakindlus püsib, kinnitage hüpotees DSC, GC-MS või TGA abil, eriti segude, lagunenud proovide ja täidetud polümeeride puhul.
Nende määramiste taga olev kirjandus
-
Alkene (C=C) usaldusväärsus 1,0
“cm-1 The characteristic bands at 955, 773 and 620 are assigned to C=C in-plane bending and C-H”
Highly Biological Active Antibiofilm, Anticancer and Osteoblast Adhesion Efficacy from MWCNT/PPy/Pd nanocomposite DOI: 10.1016/j.apsusc.2017.10.142 -
usaldusväärsus 1,0
“A weak andbroadbandat955cm-1 hybridized S 3p states into the 3d states of the ferric iron (Okude wasassignedto waterlibrationalmodes et al., 1999).”
Vibrational, X-ray absorption, and Mössbauer spectra of sulfate minerals from the weathered massive sulfide deposit at Iron Mountain, California DOI: 10.1016/j.chemgeo.2011.03.008 -
C c single bond usaldusväärsus 1,0
“response of DNA in the control cells is charac- (PO terized by the components at ~1236 cm-1 2antisymmetric stretching), 1170 cm-1 (sugarphosphate backbone vibration), 1083 cm-1 (PO symmetric stretching), and 966 cm-1with 2- (C-C stretching”
Ami 等 - 2014 - Role of water in chromosome spreading and swelling DOI: 10.4081/ejh.2014.2330 -
C-O single bond usaldusväärsus 1,0
“Moreover, three peaks generally observed cm-1, cm-1 cm-1, alkoxy-derived silica gels are visible at 1385 cm-1, 955 cm-1 and at 570 cm-1, which are due to residual in alkoxy-derived silica gels are visible at 1385 955 and at 570 which are du”
Synthesis of Bioactive Chlorogenic Acid-Silica Hybrid Materials via the Sol–Gel Route and Evaluation of Their Biocompatibility DOI: 10.3390/ma10070840 -
Silicon (Si) usaldusväärsus 1,0
“The polymer cm-1, cm-1 vibration appeared unmodified at 1728 whereas silica bands at 1080 and 460 CO stretching vibration appeared unmodified at 1728 cm-1, whereas silica bands at 1080 cm-1 due to stretching and bending of Si-O-Si, as well”
Antibacterial and Cytotoxic Silica-Polycaprolactone- Chlorogenic Acid Hybrids by Sol–Gel Route DOI: 10.3390/molecules28083486 -
usaldusväärsus 1,0
“The bands at 955 cm-1 cm-1 (S-1) and 966 (S-28) belong to Si-O lattice vibrations, while the bans at 878 (S-1)”
Colovic 等 - 2013 - Creating of Highly Active Calcium-Silicate Phases DOI: 10.2298/SOS1303341C -
Silicon (Si) usaldusväärsus 1,0
“Bands around 955 may also act as an indicator for specific surface area (SSA) as they are attributed to the asymmetric vibration of Si-OH.”
Comparing amorphous silica, short-range-ordered silicates and silicic acid species by FTIR DOI: 10.1038/s41598-022-15882-4 -
Acetate usaldusväärsus 1,0
“→ 03 Stretching of CH 2881 2877 and stretching of C-COO 955 04 Rocking of CH3 Rocking of CH3 and stretching of C-COO and characteristic peak 05 908”
Effects of Amphiphilic Chitosan on Stereocomplexation and Properties of Poly(lactic acid) Nano-biocomposite DOI: 10.1038/s41598-018-22281-1
Kas teil on selle ribaga spekter?
Laadige üles oma FTIR spekter ja saage sekunditega täielik tõlgendusaruanne — piikide määramised kirjandusviidetega, raamatukogu vasted ja usaldusväärsusega hinnatud tõendite ahel.