What absorbs at 2116 cm⁻¹ in an FTIR spectrum?
A band near 2116 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 2116 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 |
|---|---|---|---|
| Silicon hydride | 1 | 1 | 1.0 |
| Silicon (Si) | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| C#c | 1 | 1 | 1.0 |
| Nitro (NO2) | 1 | 1 | 0.8 |
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 |
|---|---|---|---|
| cellulose acetate | 2116, 1650, 1741 | Alkyl C-H | 1 |
| calcite | 2116, 2850, 2864 | Alkyl C-H | 1 |
| quartz | 2116, 800, 3053 | Alkyl C-H, Silicon (Si) | 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 2116 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
-
C#c keyakinan 1.0
“The alkyne peak at 2116 cm-1 was small for FTIR, even at high concentrations of the alkyne group”
Biotin-Conjugated Cellulose Nanofibers Prepared via Copper-Catalyzed Alkyne-Azide Cycloaddition (CuAAC) “Click” Chemistry DOI: 10.3390/nano10061172 -
Alkyl C-H keyakinan 1.0
“C≡O CO Stretching 2181 and 2116 cm-1 Alkyl groups C-H Stretching 3000-2800 cm-1 Carboxylic acids”
Pyrolysis and Volatile Evolution Behaviors of Cold-Rolling Oily Sludge DOI: 10.3390/pr10030543 -
Silicon (Si) keyakinan 1.0
“cm-1 1402 The strong absorption band observed at 2116 can be assigned to Si-H cm-1, vibration.”
Porous Silicon Oxycarbonitride Ceramics with Palladium and Pd2Si Nanoparticles for Dry Reforming of Methane DOI: 10.3390/polym14173470 -
keyakinan 0.9
“Same as above.”
Hu 等 - 2021 - In situ FTIR and ex situ XPSHS-LEIS study of supp DOI: 10.1016/S1872-2067(20)63672-5 -
keyakinan 0.9
“Explicitly stated: 'potassium ferricyanide band at 2116'”
Jorda 等 - 2022 - Characterisation of clays from Alicante province ( DOI: 10.1007/s10653-021-00925-y -
Nitro (NO2) keyakinan 0.8
“Characteristic peak for -NO2 substitution.”
Hegde 等 - 2018 - Synthesis and Antimicrobial Screening of Pyrimidin DOI: 10.5012/jkcs.2018.62.2.87
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.