What absorbs at 633 cm⁻¹ in an FTIR spectrum?
A band near 633 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
Jawapan pantas
A band near 633 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.
Penetapan kumpulan berfungsi yang mungkin
| Kumpulan berfungsi | Fakta sokongan | Sumber dipetik | Keyakinan tertinggi |
|---|---|---|---|
| Hydroxyl (O-H) | 3 | 3 | 1.0 |
| Chlorine | 2 | 2 | 1.0 |
| Phosphorus | 2 | 2 | 1.0 |
| Phosphate (PO4) | 2 | 2 | 1.0 |
| Metal oxygen | 2 | 2 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| C c single bond | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| S eq o | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
Pemeringkatan mencerminkan bukti literatur terkumpul, bukan satu peraturan berwibawa. Sentiasa sahkan terhadap konteks sampel anda.
Bahan yang mungkin
| Bahan | Puncak sokongan | Kumpulan bertindih | Sumber dipetik |
|---|---|---|---|
| kaolinite | 633, 3696, 693 | Hydroxyl (O-H), Phosphate (PO4) | 1 |
Bahan hanya dipaparkan apabila kumpulan literatur yang sama menyokong jalur ini dan sekurang-kurangnya satu puncak ciri tambahan.
Logik spektrum
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 633 cm⁻¹ is usually not enough for material identification by itself.
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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keyakinan 1.0
“The FTIR spectra results show (Figure 6) that the absorption peaks at 485, 519, and 633 cm-1 are attributed to the Al-O structural vibration and are characteristic peaks of Al2O3, consistent with the standard infrared peaks of corundum [15]”
Study on Gemological Characteristics of Blue Sapphires from Baw-Mar Mine, Mogok, Myanmar DOI: 10.3390/cryst11111275 -
keyakinan 1.0
“C-N The vibrations at 1462 and 1290 cm-1 are generated because of stretching and C-Cl bond is responsible for the bands at 605 and 633 cm-1 bending vibrations, while the (M-O) Er2O3 has a metal-oxygen bond shown at 557 cm-1 [29].”
New Hybrid PVC/PVP Polymer Blend Modified with Er2O3 Nanoparticles for Optoelectronic Applications DOI: 10.3390/polym15030684 -
Phosphate (PO4) keyakinan 1.0
“Furthermore, the presence of the bands at 1093, 1033, 991, and 633 cm-1 is related to the phosphate”
Karami 等 - 2020 - Kinetics of Cross-Linking Reaction of Epoxy Resin DOI: 10.3390/polym12051157 -
Hydroxyl (O-H) keyakinan 1.0
“This was also supported by the presence of peaks at 633 which indicates the presence of OH groups hydrogen-bonded with SO 3H (Malins et al., 2016).”
Synthesis and characterization of sulfonated activated carbon as a catalyst for bio-jet fuel production from biomass and waste plastics DOI: 10.1016/j.enconman.2014.07.007 -
Alkyl C-H keyakinan 1.0
“Vibration of "additional" CH group corresponds to the band near 633 for A2 and S2 at 614 observed 2 CH2 group corresponds to the band near 633 cm-1 for A2 and S2 at 614 cm-1 observed also also in the FTIR spectra.”
Mikolaszek 等 - 2022 - Microscopic and Spectroscopic Imaging and Thermal DOI: 10.3390/polym14142888 -
keyakinan 1.0
“cm-1 In the case of the sample JC-03 we find signals at 1175, 1129, 1088, and 987 corresponding to the symmetrical stretching vibration of S-O assigned to the presence of SO 4 cm-1 and at 633 and 608 to the bending vibration of SO 4.”
Nieto-Villena 等 - 2018 - Infrared Ellipsometry Analysis of Heritage Photogr DOI: 10.1080/00393630.2018.1476962 -
S eq o keyakinan 1.0
“capacity Moreover, there is an enlarged band with a slight change at 582 cm-1 in the composite 55 removal beads, indicating the sulfonic acid group, due to the combination of the bands at 633 and”
Potential Application of Innovative Aspergillus terreus/ Sodium Alginate Composite Beads as Eco-Friendly and Sustainable Adsorbents for Alizarin Red S Dye: Isotherms and Kinetics Models DOI: 10.3390/microorganisms11051135 -
Phosphate (PO4) keyakinan 1.0
“phosphate peaks at 633, 603 and 566 cm and decrease in 4 υ -1 For HAPS intensity.”
Wang 等 - 2012 - Formation and characterization of silica-coated HA DOI: 10.1515/secm-2011-0124
Ada spektrum dengan jalur ini?
Muat naik spektrum FTIR anda dan dapatkan laporan tafsiran penuh — penetapan puncak dengan petikan literatur, padanan perpustakaan, dan rantaian bukti berkadar keyakinan — dalam beberapa saat.