What absorbs at 3319 cm⁻¹ in an FTIR spectrum?
A band near 3319 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
Jibu la haraka
A band near 3319 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.
Ugawaji unaowezekana wa vikundi vya kazi
| Kikundi cha kazi | Ukweli unaounga mkono | Vyanzo vilivyotajwa | Uaminifu wa juu |
|---|---|---|---|
| Hydroxyl (O-H) | 6 | 5 | 1.0 |
| N h | 4 | 4 | 1.0 |
| Water (H2O) | 2 | 2 | 1.0 |
| Lignin | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
Cheo kinaonyesha ushahidi wa fasihi uliokusanywa, si sheria moja yenye mamlaka. Thibitisha kila mara dhidi ya mazingira ya sampuli yako.
Nyenzo zinazowezekana
| Nyenzo | Vilele vya usaidizi | Vikundi vinavyoingiliana | Vyanzo vilivyotajwa |
|---|---|---|---|
| cellulose | 3319, 1735, 1650 | Hydroxyl (O-H) | 1 |
| nanoparticles | 3319, 1732, 1647 | Hydroxyl (O-H) | 1 |
Nyenzo zinaonyeshwa tu wakati mkusanyiko sawa wa fasihi unaunga mkono bendi hii na angalau kilele kimoja cha ziada cha sifa.
Mantiki ya wigo
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 3319 cm⁻¹ is usually not enough for material identification by itself.
Matumizi ya ulimwengu halisi
Aina hii ya swala ni ya kawaida katika utambuzi wa polima, uchunguzi wa plastiki isiyojulikana, utatuzi wa shida za QC, uthibitishaji wa nyenzo zilizosindikwa, na ukaguzi wa ugawaji wa kilele unaoungwa mkono na fasihi.
Makosa ya kawaida
- Kuchukua bendi moja iliyotengwa kama uthibitisho wa nyenzo bila kuangalia angalau kilele kimoja au viwili vya usaidizi.
- Kupuuza mwingiliano: vikundi vingi vya utendaji vinaweza kuchangia karibu na nambari ya wimbi sawa.
- Kuruka uthibitishaji wakati viongezi, mchanganyiko, uoksidishaji, au uchafuzi unaweza kupotosha wigo.
Ushauri wa uthibitishaji.
Wakati utata unabaki, thibitisha nadharia kwa kutumia DSC, GC-MS, au TGA, hasa kwa mchanganyiko, sampuli zilizoharibika, na polima zilizojazwa.
Fasihi nyuma ya ugawaji huu
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Hydroxyl (O-H) uaminifu 1.0
“[41-42] IR analysis of the whole plant extract of Gotu kola revealed that the presence of different functional groups ranging from O-H stretching, hydroxyl (3319.26 cm-1), C-H stretching, carbonyl (2921.96 cm-1), C=C”
Kumar 等 - 2021 - Centella asiatica mediated facile green synthesis DOI: 10.1016/j.inoche.2021.108865 -
Hydroxyl (O-H) uaminifu 1.0
“were observed in the spectral ranges of 2614-4000 and 1465-1853 The FTIR spectra of fresh and cm-1, spoiled beetroot test samples showed wide and strong bands at 3319 and 1637 which corresponded to asymmetric and symmetric stretching vibrat”
Analysis of Moisture Content in Beetroot using Fourier Transform Infrared Spectroscopy and by Principal Component Analysis DOI: 10.1038/s41598-018-26243-5 -
N h uaminifu 1.0
“The remaining band at 1599 cm-1 sites.20,33 acid The final peak at 3319 results from attributed to the asymmetric deformation of NH ((cid:228) as(NH 3)) 3 sites.20 as(NH 3) coordinated to Lewis acid (cid:238)”
Pena 等 - 2004 - Identification of surface species on titania-suppo DOI: 10.1021/jp0313122 -
Water (H2O) uaminifu 1.0
“Pure distilled water showed a strong IR absorbance band at 3319.48 cm-1 stretching) and around 1636.63 (H-O-H bending).”
Chemometric analysis of cow dung ash as an adsorbent for purifying biodiesel from waste cooking oil DOI: 10.1038/s41598-017-09881-z -
uaminifu 1.0
“The medium peak at cm-1 3319 represents N-H stretching vibration that showed Significance of each individual process variables and overall the presence of amine group on the surface of biosorbent.”
Biosorption of copper(II) onto spent biomass of Gelidiella acerosa (brown marine algae): optimization and kinetic studies DOI: 10.1007/s13201-019-1125-3 -
Hydroxyl (O-H) uaminifu 1.0
“The band at cm-1 3319 is attributed to the OH groups in lignin.”
Chemical functional groups of extractives, cellulose and lignin extracted from native Leucaena leucocephala bark DOI: 10.1007/s00226-020-01258-2 -
uaminifu 1.0
“1c shows the IR A spectrum of 15DAN monomer, which displayed the characteristic peaks at 3416 and u t h 3319cm-1 and are ascribed to N-H stretching of the primary amino groups [32], these dual o”
Olanipekun 等 - 2015 - Synthesis and characterization of reduced graphite DOI: 10.1016/j.saa. -
uaminifu 1.0
“trum of the Por-BZ monomer, with the main characteristic signals being those for the heat of 163 J Compared with the typical thermal curing temperature of a Pa-type BZ oxazine ring (948 cm-1), C-O stretching (1222 cm-1), and N-H stretching”
Zhang 等 - 2022 - Metal Complexes of the Porphyrin-Functionalized Po DOI: 10.3390/polym14030449
Una wigo wenye bendi hii?
Pakia wigo wako wa FTIR na upate ripoti kamili ya tafsiri — ugawaji wa vilele na marejeleo ya fasihi, ulinganishaji wa maktaba, na mlolongo wa ushahidi wenye kiwango cha uaminifu — kwa sekunde.