What absorbs at 2977 cm⁻¹ in an FTIR spectrum?
A band near 2977 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 2977 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 |
|---|---|---|---|
| Alkyl C-H | 10 | 10 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Carbohydrate | 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 | 2977, 1735, 1650 | Alkyl C-H, Carbohydrate | 1 |
| hemicellulose | 2977, 1730, 897 | Alkyl C-H | 1 |
| lignin | 2977, 1035, 1510 | Alkyl C-H | 1 |
| biomass | 2977, 1082, 1282 | Alkyl C-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 2977 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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Alkyl C-H uaminifu 1.0
“cm-1 The peaks that appear at 2977 and 2898 were 3.3 FTIR-ATR spectroscopy characterization associated with the stretching of the C-H bond.”
Mondragon-Cortez 等 - 2022 - Application of Fourier transform infrared spectros DOI: 10.24275/rmiq/Alim2806 -
Alkyl C-H uaminifu 1.0
“These waveband peak results 2977 is attributed to the C-H vibrations of the may indicate a reduction in sugar, which would and -CH moiety vibrations in alkyl group and -CH 2”
Use of thermal imaging and Fourier transform infrared spectroscopy for the pre-symptomatic detection of cucumber downy mildew DOI: 10.1007/s10658-019-01775-2 -
Alkyl C-H uaminifu 1.0
“LLM confirmed rule peak-group candidate”
Ajibade 和 Mbese - 2014 - Synthesis and Characterization of Metal Sulfides N DOI: 10.1155/2014/752394 -
Alkyl C-H uaminifu 1.0
“Bond (vibration) Degradation product 2977 C-H (asymmetric stretching) C xH y”
Hejna 等 - 2017 - Performance properties of rigid polyurethane-polyi DOI: 10.1515/epoly-2017-0012 -
Alkyl C-H uaminifu 1.0
“at 2977 and 2924 cm-1 due to stretching vibration of C-H (the bands at 2994, 2977, 2924, 2904 and 2890 would be due to”
Oliveira 等 - 2016 - FTIR analysis and quantification of phenols and fl DOI: 10.1590/S1517-707620160003.0072 -
Alkyl C-H uaminifu 1.0
“peaks at 2977 and 2931 were cm-1 assigned to C-H stretching vibration within the ring;”
In Vitro Interaction of Doxorubicin-Loaded Silk Sericin Nanocarriers with MCF-7 Breast Cancer Cells Leads to DNA Damage DOI: 10.3390/polym13132047 -
Alkyl C-H uaminifu 1.0
“The absorptions at 2977 and 2929, cm-1 2900 are allocated to symmetric and anti-symmetric vibration of CH in the alkyl chain in EO, tween 20, 2”
Nanoliposomes containing three essential oils from the Artemisia genus as effective larvicides against Aedes aegypti and Anopheles stephensi DOI: 10.1038/s41598-023-38284-6 -
Alkyl C-H uaminifu 1.0
“1026 C-O stretching 2977 C-H stretching 2875 C-H stretching”
Zhuang 等 - 2020 - Observation of Potential Contaminants in Processed DOI: 10.3390/app10124345
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.