What absorbs at 1676 cm⁻¹ in an FTIR spectrum?
A band near 1676 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
Gán nhóm chức có thể
| Nhóm chức | Sự kiện hỗ trợ | Nguồn tham khảo | Độ tin cậy cao nhất |
|---|---|---|---|
| Amide | 5 | 5 | 1,0 |
| Carbonyl (C=O) | 3 | 3 | 1,0 |
| Carboxyl (COOH) | 2 | 2 | 1,0 |
| Methacrylate | 2 | 2 | 1,0 |
| Acetate | 2 | 2 | 1,0 |
| Protein | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Carbohydrate | 1 | 1 | 1,0 |
| Protein beta sheet | 1 | 1 | 1,0 |
| Protein beta turn | 1 | 1 | 1,0 |
Xếp hạng phản ánh bằng chứng tài liệu tích lũy, không phải một quy tắc duy nhất có thẩm quyền. Luôn xác nhận với ngữ cảnh mẫu của bạn.
Tài liệu tham khảo đằng sau các gán này
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Amide độ tin cậy 1,0
“The positive influence of PC2 loadings had three peaks at 1676, 1630 cm-1 assigned to amide I (β-turns and β-sheets), and 1063 cm-1 (mostly might be related to cellulose and hemicellulose) which differentiated the control SR (outstanding) f”
Specific Mycoparasite-Fusarium Graminearum Molecular Signatures in Germinating Seeds Disabled Fusarium Head Blight Pathogen’s Infection DOI: 10.3390/ijms22052461 -
Carbonyl (C=O) độ tin cậy 1,0
“Text: 'IR peaks at 1676 cm-1 down-shifted from 1703 cm-1 (C=O stretching)'”
Curve-fitting FTIR studies of loratadine/hydroxypropyl-β-cyclodextrin inclusion complex induced by co-grinding process DOI: 10.1016/j.jpba.2010.06.010 -
Carbonyl (C=O) độ tin cậy 1,0
“J.Morosetal./JournalofPharmaceuticalandBiomedicalAnalysis43(2007)1277-1282 1280 1676cm-1 and it can be related to the presence of a carbonyl group (C O).”
Moros 等 - 2007 - Quality control Fourier transform infrared determi DOI: 10.1016/j.jpba.2006.10.036 -
Amide độ tin cậy 1,0
“The shifts of 1676 cm-1 Liquid → Liquid 1 + Liquid 2 transition occurs also through a and 1655 correspond to amide I weakly and more strongnucleation and growth process but in most cases through hetly H-bonded respectively.”
Origin of Invariant Gel Melting Temperatures in the c-T Phase Diagram of an Organogel DOI: 10.1021/acs.langmuir.6b00995 -
Amide độ tin cậy 1,0
“peaks of amide-I at 1676 (-)/1666 (+)/1658 (-)/1651 (+) At 163 K, observed water signals are similar to those at cm-1 upon formation of Batho at 77 K, among which the 77 K, with some variations (Fig.”
Hanai 等 - 2021 - Light-induced difference FTIR spectroscopy of prim DOI: 10.2142/biophysico.bppb-v18.005 -
Amide độ tin cậy 1,0
“LLM confirmed rule peak-group candidate”
Purification and Characterization of a Novel Calcium-Binding Heptapeptide from the Hydrolysate of Tilapia Bone with Its Osteogenic Activity DOI: 10.3390/foods11030468 -
Amide độ tin cậy 1,0
“Signals near 2900 (C-H stretching band) were scarcely informative, whereas the clear cm-1 (C=O shoulder-peak at 1676 stretching band) could be from amide I in proteins.”
“Argento Deaurato” or “Argento Biancheggiato”? A Rare and Interesting Case of Silver Background in Italian Painting of the XIII Century DOI: 10.3390/app10072404 -
Alkene (C=C) độ tin cậy 1,0
“cm-1 The intense band observed at 1676 is due to vibrations of C=C (cis and trans), confi rming the presor parts of molecules inside their cavity through non-”
Pinto Cotrim 等 - 2016 - Preparation of beta-CyclodextrinLatex Dispersion DOI: 10.7569/JRM.2015.634122
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