What absorbs at 1501 cm⁻¹ in an FTIR spectrum?
A band near 1501 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 6 cited sources
Jawapan pantas
A band near 1501 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 |
|---|---|---|---|
| Alkene (C=C) | 2 | 2 | 1.0 |
| Imide | 2 | 2 | 1.0 |
| Anhydride | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 0.8 |
Pemeringkatan mencerminkan bukti literatur terkumpul, bukan satu peraturan berwibawa. Sentiasa sahkan terhadap konteks sampel anda.
Bahan yang mungkin
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 1501 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
-
Imide keyakinan 1.0
“1376-cm(cid:2)1 the imide band normalized to the 1501gion.”
Studies on the photodegradation of polarized UV-exposed PMDA-ODA polyimide films DOI: 10.1002/app.11315 -
Imide keyakinan 1.0
“The degree of imidization was followed at the 1375cm-' imide band, normalized to the 1501cm-' band as internal October isolated from other standard.”
Ha 等 - 1998 - Polarized Infrared Spectroscopic Studies of Polari DOI: 10.1080/10587259808025380 -
Alkene (C=C) keyakinan 1.0
“3417 and bending vibrations, 1001 - corresponds to single bond The increase in the Absorbance 2000cm(cid:1)1 3642cm(cid:1)1 stretches, 1501 - value of Wavenumber corresponds to double bond stretch, as shown in Fig.”
Nari 等 - 2021 - A comparative study on the thermal behaviour of PP DOI: 10.1016/j.matpr.2020.05.708 -
Alkene (C=C) keyakinan 1.0
“cm-1 (Figure2 2), Based on FTIR spectra graphite has C=C stretching at 1501 1609c 1497”
Sugianto 等 - 2019 - Facile Synthesis of Lycopene Reduced Graphene Oxid DOI: 10.1088/1757-899X/546/4/042044 -
keyakinan 0.9
“Text: '1501cm-1 KL2 1515cm-1 ]C-N'”
Nqombolo 和 Ajibade - 2016 - Synthesis and Spectral Studies of Ni(II) Dithiocar DOI: 10.1155/2016/1293790 -
C-O single bond keyakinan 0.8
“Explicit assignment: 'asymmetric stretch) appeared around 1501' and context suggests C-O-C”
The inhibition performance of a novel benzenesulfonamide-based benzoxazine compound in the corrosion of X60 carbon steel in an acidizing environment DOI: 10.1039/d0ra10317a
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.