Apakah yang menyerap pada 1664 cm⁻¹ dalam spektrum FTIR?
Jalur berhampiran 1664 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 1664 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 | 16 | 15 | 1.0 |
| Carbonyl (C=O) | 14 | 14 | 1.0 |
| Methacrylate | 8 | 8 | 1.0 |
| Ketone | 8 | 8 | 1.0 |
| Ester | 8 | 8 | 1.0 |
| Carboxyl (COOH) | 8 | 8 | 1.0 |
| Acetate | 8 | 8 | 1.0 |
| Protein alpha helix | 5 | 5 | 1.0 |
| N h | 4 | 4 | 1.0 |
| Hydroxyl (O-H) | 3 | 3 | 1.0 |
| Alkene (C=C) | 2 | 2 | 1.0 |
| Ring structure | 2 | 2 | 1.0 |
| Urethane | 2 | 2 | 1.0 |
| Hydrogen bond | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Metal oxygen | 1 | 1 | 1.0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1.0 |
| Protein beta turn | 1 | 1 | 1.0 |
| Protein beta sheet | 1 | 1 | 1.0 |
| Urea | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Sulfur | 1 | 1 | 0.8 |
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 |
|---|---|---|---|
| ZnO | 1664, 1400, 3430 | Methacrylate, Amide | 1 |
| bio-based | 1664, 1720, 1740 | Carbonyl (C=O), Methacrylate, Amide | 1 |
| polysaccharide | 1664, 1637, 1320 | Methacrylate, Amide | 1 |
| gold nanoparticles | 1664, 1638, 3252 | Amide, Methacrylate, Carbonyl (C=O) | 1 |
| nanocomposite | 1664, 2921, 3300 | Methacrylate | 1 |
| polymer | 1664, 1718, 1722 | Methacrylate, Carbonyl (C=O) | 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 1664 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
-
Alkyl C-H keyakinan 1.0
“The incorporation of PAN chains was further supported cm.-1 cm-1 by methylene C-H bending peak at 1664 CH bending is seen at 1453 (asym) and 3”
Synthesis of Aloevera/Acrylonitrile based Nanoparticles for targeted drug delivery of 5-Aminosalicylic acid DOI: 10.1016/j.ijbiomac.2017.08.085 -
Acetate keyakinan 1.0
“2(b) shows the C=O peak shifting 1664 was huge.”
Mohammed 等 - 2020 - Thermal and Structure Analysis Based on Exfoliatio DOI: 10.22146/ijc.40872 -
Amide keyakinan 1.0
“Images generated from the normalized intensity of the second derivative of the FTIR cm-1) cm-1): and the shifted protein amide I band (1664 (d, e) for controls (skin spectra, centered around the hydroxamate amide II band (1562”
High-Sensitivity Permeation Analysis of Ultrasmall Nanoparticles Across the Skin by Positron Emission Tomography DOI: 10.1021/acs.bioconjchem.1c00017 -
Acetate keyakinan 1.0
“Three Gaussian-Lorentzian sums were considered in the curve fitting of the carbonyl region (Figure 6) at 1729 cm-1, 1710 cm-1 and 1664 cm-1, where they corresponded to C=O free urethane, C=O H-bonded urethane and C=O urea [4], respectively.”
Effects of NCO/OH Ratios on Bio-Based Polyurethane Film Properties Made from Acacia mangium Liquefied Wood DOI: 10.3390/polym15051154 -
Carbonyl (C=O) keyakinan 1.0
“The AG had a molecular weight of acterized bya band at 1664 whereas carbonyl stretch of acid inCHOL-ALwasconfirmedbyabandat1714cm(cid:1)1Carbonylstretch reports.21 around 13 KDa as per the literature Increase in the mocm(cid:1)1.”
Cholesterol anchored arabinogalactan for asialoglycoprotein receptor targeting: synthesis, characterization, and proof of concept of hepatospecific delivery DOI: 10.1016/j.carres.2015.03.003 -
Amide keyakinan 1.0
“The individual peak at 1664 cm-1 1664 was noted as an amide I band (C=O), and a C=C ring vibration of the polyamide cm-1 was noted as an amide I band (C=O), and a C=C ring vibration of the polyamide layer cm-1 cm-1 layer at 1609 [41] appear”
Autopsy of Used Reverse Osmosis Membranes from the Largest Seawater Desalination Plant in Oman DOI: 10.3390/membranes12070671 -
Amide keyakinan 1.0
“Peak at cm-1 cm-1 1664 is indicative of C = O stretching of amide-I group and peak at 1610 (N-H cm-1 bending of amide-II).”
Development, characterization and In-vitro evaluation of guar gum based new polymeric matrices for controlled delivery using metformin HCl as model drug DOI: 10.1371/journal.pone.0271623 -
Acetate keyakinan 1.0
“The spectrum in Figure 5b cm-1 corresponds with typical pristine gelatin fibers, with C=O stretching vibration appearing which determine the PL in the orange-red region, had been passivated during GNF@ZnO at 1664 cm-1, demonstrated by the a”
Babayevska 等 - 2021 - Fabrication of Gelatin-ZnO Nanofibers for Antibact DOI: 10.3390/ma14010103
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.