Apakah yang menyerap pada 1643 cm⁻¹ dalam spektrum FTIR?
Jalur berhampiran 1643 cm⁻¹ boleh menunjuk kepada beberapa kumpulan berfungsi. Di bawah adalah tugasan yang paling mungkin, disusun mengikut berapa banyak bukti yang diterbitkan menyokong setiap satu — setiap satu dapat dikesan ke literatur (DOI) dan disahkan silang terhadap 130,000+ spektrum rujukan dan graf pengetahuan kami.
Backed by 8 cited sources
Jawapan pantas
Jalur berhampiran 1643 cm⁻¹ biasanya ditafsirkan dengan memeriksa kumpulan berfungsi yang sering wujud bersama di sana dalam literatur, kemudian mengesahkan sekurang-kurangnya satu atau dua puncak tambahan dalam sampel yang sama. Halaman ini menyusun tugasan tersebut berdasarkan bukti terkumpul dan bukannya peraturan buku teks tetap tunggal.
Penetapan kumpulan berfungsi yang mungkin
| Kumpulan berfungsi | Fakta sokongan | Sumber dipetik | Keyakinan tertinggi |
|---|---|---|---|
| Amide | 28 | 26 | 1.0 |
| Carbonyl (C=O) | 20 | 18 | 1.0 |
| Methacrylate | 16 | 15 | 1.0 |
| Acetate | 16 | 15 | 1.0 |
| Ketone | 13 | 12 | 1.0 |
| Carboxyl (COOH) | 13 | 12 | 1.0 |
| Hydroxyl (O-H) | 13 | 12 | 1.0 |
| Ester | 12 | 11 | 1.0 |
| Alkene (C=C) | 10 | 7 | 1.0 |
| N h | 9 | 9 | 1.0 |
| Alkyl C-H | 7 | 7 | 1.0 |
| Methoxy (OCH3) | 5 | 5 | 1.0 |
| C-O single bond | 5 | 5 | 1.0 |
| C c single bond | 4 | 4 | 1.0 |
| Water (H2O) | 4 | 4 | 1.0 |
| Secondary amine | 3 | 3 | 1.0 |
| C n single bond | 3 | 3 | 1.0 |
| Aromatic ring | 2 | 2 | 1.0 |
| Protein | 2 | 2 | 1.0 |
| Carbohydrate | 2 | 2 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1.0 |
| Silicon (Si) | 1 | 1 | 1.0 |
| Carbon dioxide | 1 | 1 | 1.0 |
| Nucleic acid | 1 | 1 | 1.0 |
| N n bond | 1 | 1 | 1.0 |
| Acetyl | 1 | 1 | 1.0 |
| Amino acid | 1 | 1 | 1.0 |
| Protein random coil | 1 | 1 | 1.0 |
Peringkat mencerminkan bukti literatur terkumpul, bukan peraturan tetap tunggal. Sentiasa sahkan berdasarkan konteks sampel anda.
Bahan yang mungkin
| Bahan | Puncak sokongan | Kumpulan bertindih | Sumber dipetik |
|---|---|---|---|
| Polyamide | 1643, 1663, 1541 | Amide, Carbonyl (C=O), Methacrylate | 1 |
| AgNPs | 1643, 1232, 1048 | Methacrylate, Acetate, Amide | 1 |
| graphene | 1643, 1720, 2097 | Methacrylate, Acetate, Amide | 1 |
| microplastics | 1643, 1614, 1760 | Carbonyl (C=O), Methacrylate, Acetate | 1 |
| Silver Nanoparticles (AgNPs) | 1643, 1100, 1749 | Amide, Methacrylate, Acetate | 1 |
Bahan hanya dipaparkan apabila kumpulan literatur yang sama menyokong jalur ini dan sekurang-kurangnya satu puncak ciri tambahan.
Logik spektrum
Jalur ini menjadi bermakna hanya apabila dibaca dengan puncak-puncak jirannya. Dalam amalan, penganalisis terlebih dahulu melihat tugasan di atas, kemudian menyemak sama ada sampel yang sama juga menunjukkan puncak lain yang dijangka untuk motif struktur yang sama. Jalur tunggal berhampiran 1643 cm⁻¹ biasanya tidak mencukupi untuk pengenalpastian bahan dengan sendirinya.
Penggunaan dunia sebenar
Jenis pertanyaan ini biasa dalam pengenalpastian polimer, saringan plastik tidak diketahui, penyelesaian masalah QC, pengesahan bahan kitar semula, dan semakan tugasan puncak yang disokong oleh literatur.
Kesilapan biasa
- Menganggap satu jalur terpencil sebagai bukti bahan tanpa memeriksa sekurang-kurangnya satu atau dua puncak sokongan.
- Mengabaikan pertindihan: pelbagai kumpulan berfungsi boleh menyumbang berhampiran nombor gelombang yang sama.
- Melangkau pengesahan apabila bahan tambahan, campuran, pengoksidaan, atau pencemaran boleh memesongkan spektrum.
Nasihat pengesahan
Apabila kekaburan masih ada, sahkan hipotesis dengan DSC, GC-MS, atau TGA, terutamanya untuk campuran, sampel terdegradasi, dan polimer terisi.
Literatur di sebalik penetapan ini
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Alkene (C=C) keyakinan 1.0
“cm-1 peak at 1705.1 means that there is a bond of cm-1 -C=O, and also absorption at 1643.4 and medium intensity which shows the presence of C=C.”
Aritonang 等 - 2019 - Grafting of Oleic Acid On Cyclic Natural Rubber Re DOI: 10.13005/ojc/350119 -
Alkene (C=C) keyakinan 1.0
“In the spectra related to the PE fragments and pellets, new weathering bands from After twenty days of photo-exposition of particles in the climate room, the PP showed 1510 to 1770 cm-1 of absorbance, with centred peaks at about 1614 cm-1 (”
Campanale 等 - 2023 - Fourier Transform Infrared Spectroscopy to Assess DOI: 10.3390/polym15040911 -
Carbonyl (C=O) keyakinan 1.0
“cm-1 were impregnated either by the antibiotic only or Whereas, the band at 1643.2 arises due to by the AgNPs only and also by combinations them carbonyl stretch, unsaturated aldhyde, ketone”
El-Mekkawy 等 - 2021 - Silver Nanoparticles (AgNPs) Biosynthesized by Asp DOI: 10.22207/JPAM.15.1.05 -
keyakinan 1.0
“Two OH stretching bands were cm(cid:1)1 cm(cid:1)1 observed at 3620-3600 and 3502-3478 along with HOH bending band at 16533 With using DFT-B3LYP and a basis set of 6-31G(d,p), free 1196cm(cid:1)1 cm(cid:1)1 HSO(cid:1) ion adopted here yield”
Futamata 等 - 2005 - ATR-SEIR study of anions and water adsorbed on pla DOI: 10.1016/j.susc.2005.06.020 -
Acetate keyakinan 1.0
“FTIR cm-1 spectra of copal show a vibrational band at 1643 (C=O stretching) attributed to communic acids, while amber shows cm-1 cm-1, a band at 1735 associated with ester-group vibrations and a shoulder at about 3340 suggesting partial oxi”
Differentiation between copal and amber by their structure and thermal behaviour DOI: 10.1007/s10973-023-12333-8 -
Amide keyakinan 1.0
“Therein, the 1632~1643 cm-1 wheat, glutinous rice, and mung bean powders with high is assigned to Amide assigned to Amide I, 1532~1535 cm-1 cm-1 carbohydrate contents, the peak intensities for the 1641 is assigned to Amide III, which are II”
JOONSUK - 2019 - ATR-FTIR Analysis of Adhesives Jointing Buddhist S DOI: 10.12654/JCS.2019.35.1.02 -
C c single bond keyakinan 1.0
“FTIR spectrum showed an cm-1assigned absorption band at 1643.41 to the C C stretching vibration of the hexagonal ring also there were oxygen-containing functional groups such as C O and O H.”
Production of graphene powder by electrochemical exfoliation of graphite electrodes immersed in aqueous solution DOI: 10.1016/j.ijleo.2016.04.101 -
Acetate keyakinan 1.0
“shifted to a higher wavenumber of 1725 The peared due to the anion exchange reaction taking cm-1 3peak at 1643 corresponds to the C=O in PVP place between the ILs and the NO ions of the TFA4due to the Ag/PVP interaction and the actual peak”
Lakshmanamoorthy 和 Manivannan - 2022 - Ionic liquids assist synthesis of AgAgX (X = Cl, DOI: 10.1007/s10854-021-06774-w
Ada spektrum dengan jalur ini?
Muat naik spektrum FTIR anda dan dapatkan laporan tafsiran penuh — tugasan puncak dengan petikan literatur, padanan perpustakaan, dan analisis berasaskan literatur — dalam beberapa saat.