What absorbs at 1251 cm⁻¹ in an FTIR spectrum?
A band near 1251 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
त्वरित उत्तर
A band near 1251 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.
संभाव्य कार्यात्मक-गट नियुक्त्या
| कार्यात्मक गट | समर्थन करणारी तथ्ये | उद्धृत स्रोत | सर्वोच्च आत्मविश्वास |
|---|---|---|---|
| Methacrylate | 6 | 6 | 1.0 |
| Acetate | 6 | 6 | 1.0 |
| Methoxy (OCH3) | 5 | 5 | 1.0 |
| C-O single bond | 5 | 5 | 1.0 |
| Amide | 3 | 2 | 1.0 |
| Alkyl C-H | 2 | 2 | 1.0 |
| Aromatic ring | 2 | 2 | 1.0 |
| Carbonyl (C=O) | 2 | 2 | 1.0 |
| Carboxyl (COOH) | 2 | 2 | 1.0 |
| Ring structure | 2 | 2 | 1.0 |
| Ester | 2 | 2 | 1.0 |
| Phosphate (PO4) | 2 | 1 | 1.0 |
| C c single bond | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Oxygen heterocycle | 1 | 1 | 1.0 |
| Borate | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Carbohydrate | 1 | 1 | 0.8 |
| Phosphorus | 1 | 0 | 1.0 |
| Nitrogen heterocycle | 1 | 0 | 0.9 |
रँकिंग संचित साहित्य पुरावा प्रतिबिंबित करते, एकच अधिकृत नियम नाही. नेहमी तुमच्या नमुना संदर्भाविरुद्ध पुष्टी करा.
संभाव्य साहित्य
| सामग्री | सहाय्यक शिखरे | ओव्हरलॅपिंग गट | उद्धृत स्रोत |
|---|---|---|---|
| PVA | 1251, 1660, 2930 | Acetate, Methacrylate, C-O single bond | 1 |
| Fe3O4 | 1251, 2358, 1673 | Methacrylate, Acetate | 1 |
| ZnS | 1251, 1650, 1116 | Acetate, Methacrylate | 1 |
| Fe3O4 nanoparticles | 1251, 1673, 1470 | Methacrylate, Acetate | 1 |
साहित्य केवळ तेव्हाच दर्शविले जातात जेव्हा समान साहित्य पूल या बँडला आणि किमान एक अतिरिक्त वैशिष्ट्यपूर्ण शिखराला समर्थन देतो.
स्पेक्ट्रम तर्क
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 1251 cm⁻¹ is usually not enough for material identification by itself.
वास्तविक-जग वापर
या प्रकारचा प्रश्न पॉलिमर ओळख, अज्ञात प्लास्टिक स्क्रीनिंग, क्यूसी ट्रबलशूटिंग, रिसायकल केलेल्या सामग्रीची पडताळणी आणि साहित्य-समर्थित पीक असाइनमेंट पुनरावलोकनात सामान्य आहे.
सामान्य चुका
- कमीत कमी एक किंवा दोन सहाय्यक शिखरे तपासल्याशिवाय एका वेगळ्या बँडला सामग्रीचा पुरावा मानणे.
- ओव्हरलॅप दुर्लक्षित करणे: अनेक कार्यात्मक गट समान तरंगसंख्येजवळ योगदान देऊ शकतात.
- जेव्हा अॅडिटीव्हज, ब्लेंड्स, ऑक्सिडेशन किंवा दूषितता स्पेक्ट्रम विकृत करू शकतात तेव्हा वैधता वगळणे.
पडताळणी सल्ला
जेव्हा अस्पष्टता राहते, तेव्हा DSC, GC-MS किंवा TGA सह गृहीतक प्रमाणित करा, विशेषतः मिश्रण, खराब झालेले नमुने आणि भरलेले पॉलिमर यासाठी.
या नियुक्त्यांमागील साहित्य
-
आत्मविश्वास 1.0
“The moderate cm-1 belongs to N-H stretching absorption peak at 1251”
In-doped ZnS nanoparticles: structural, morphological, optical and antibacterial properties DOI: 10.1007/s00339-021-04425-9 -
Borate आत्मविश्वास 1.0
“cm-1 *1251 The band centered at is attributed to B-O The resulted IR data were used in this research in order to stretching vibrations in [BO 3] units from boroxol cm-1”
Rada 等 - 2009 - Structural and electronic properties of tellurite DOI: 10.1007/s10853-009-3433-8 -
Acetate आत्मविश्वास 1.0
“cm-1 C-O stretching 1251 cm-1”
Influence of Polyvinyl Alcohol (PVA) on PVA-Poly-N-hydroxyethyl-aspartamide (PVA-PHEA) Microcrystalline Solid Dispersion Films DOI: 10.1208/s12249-020-01811-z -
Oxygen heterocycle आत्मविश्वास 1.0
“For spectrum, the main peaks located at 1251 and 877 LENR cm-1 are assigned for symmetric and asymmetric stretching of epoxide ring, respectively.”
Azhar 等 - 2017 - Epoxidation and Hydroxylation of Liquid Natural Ru DOI: 10.17576/jsm-2017-4603-17 -
Amide आत्मविश्वास 1.0
“resents another alternative by accurately quantifying ligand The maximum amide peaking at 1653, 1546 and 1251 cm-1 density, but such techniques require matrix digestion [50].”
Boulet-Audet 等 - 2015 - Cleaning-in-place of immunoaffinity resins monitor DOI: 10.1007/s00216-015-8871-3) -
Acetate आत्मविश्वास 1.0
“the C-O-C peaks of the ester bond at 1251 and cm-1 1024 also confirm this.”
Synthesis and Application of Tackifying Dispersant Poly (Vinyl Alcohol-Acrylic Acid-Triallyl Cyanate) DOI: 10.3390/polym14030557 -
Phosphate (PO4) आत्मविश्वास 1.0
“Furthermore, an cm-1) ester bond in the FTIR spectra (C=O stretching at 1745 was selected for the estimation cm-1) of lipids and a phosphate functional group bond (P=O stretching at 1251 was selected for the estimation of polyphosphates.”
Calcium Affects Polyphosphate and Lipid Accumulation in Mucoromycota Fungi DOI: 10.3390/jof7040300 -
Acetate आत्मविश्वास 1.0
“(b) (c) and The main vibrations, where the greatest changes in the wood occurred, were identified at the peaks at 1251 cm-1, which is related to the C-O stretching vibration;”
Moya 等 - 2022 - In Situ Synthesis of Fe3O4 Nanoparticles and Wood DOI: 10.3390/ma15093394
या बँडसह स्पेक्ट्रम आहे का?
तुमचे FTIR स्पेक्ट्रम अपलोड करा आणि सेकंदात पूर्ण व्याख्या अहवाल मिळवा — साहित्य संदर्भांसह शिखर नियुक्त्या, लायब्ररी मॅचेस, आणि आत्मविश्वास-रेट केलेली पुरावा साखळी.