What absorbs at 671 cm⁻¹ in an FTIR spectrum?
A band near 671 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
Quick answer
A band near 671 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.
সম্ভাব্য কার্যকরী-গ্রুপ অ্যাসাইনমেন্ট
| কার্যকরী গ্রুপ | সমর্থনকারী তথ্য | উদ্ধৃত সূত্র | সর্বোচ্চ আত্মবিশ্বাস |
|---|---|---|---|
| Metal oxygen | 6 | 6 | 1.0 |
| Alkyl C-H | 3 | 3 | 1.0 |
| Aromatic ring | 2 | 2 | 1.0 |
| Ring structure | 2 | 2 | 1.0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1.0 |
| Silicon (Si) | 2 | 2 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| N-O bond | 1 | 1 | 1.0 |
| Chlorine | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| Phosphate (PO4) | 1 | 1 | 1.0 |
| Siloxane (Si-O-Si) | 1 | 1 | 0.9 |
| Sulfate (SO4) | 1 | 1 | 0.9 |
র্যাঙ্কিং জমা হওয়া সাহিত্য প্রমাণ প্রতিফলিত করে, একটি একক কর্তৃত্বপূর্ণ নিয়ম নয়। সর্বদা আপনার নমুনা প্রসঙ্গের বিরুদ্ধে নিশ্চিত করুন।
Spectrum logic
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 671 cm⁻¹ is usually not enough for material identification by itself.
Real-world usage
This type of query is common in polymer identification, unknown plastic screening, QC troubleshooting, recycled-material verification, and literature-backed peak assignment review.
Common mistakes
- Treating one isolated band as proof of a material without checking at least one or two supporting peaks.
- Ignoring overlap: multiple functional groups can contribute near the same wavenumber.
- Skipping validation when additives, blends, oxidation, or contamination may distort the spectrum.
Verification advice
When ambiguity remains, validate the hypothesis with DSC, GC-MS, or TGA, especially for blends, degraded samples, and filled polymers.
এই অ্যাসাইনমেন্টগুলোর পেছনে সাহিত্য
-
Metal oxygen আত্মবিশ্বাস 1.0
“The Sn-O stretching is observed at 671 for binary zinc tin”
Effect of annealing temperature on optical properties of binary zinc tin oxide nano-composite prepared by sol⠍gel route using simple precursors: Structural and optical studies by DRS, FT-IR, XRD, FESEM investigations DOI: 10.1016/j.saa.2014.08.031 -
Metal oxygen আত্মবিশ্বাস 1.0
“All the cases of spectra that produced 𝐶𝑜 0.5𝑍𝑛 0.5𝐶𝑑 𝑥𝐹𝑒 (2-𝑥)𝑂 cm-1 cm-1), absorption peaks in the fingerprint region (400 -800 which is due to M-O stretching 671 that ensures the presence of ferrites in prepared samples and designates th”
Manimegalai 等 - 2022 - Experimental investigation on ferrofluid propertie DOI: 10.15251/DJNB.2022.172.661 -
Phosphate (PO4) আত্মবিশ্বাস 1.0
“ATD-FTIR spectra of the Salisbury's patina exhibit peaks at 2361, 2341 and 671 cm-1 (assigned to phosphates);”
Martin-Gil 等 - 2005 - The orange-brown patina of Salisbury Cathedral (We DOI: 10.1065/espr2005.05.257 -
Metal oxygen আত্মবিশ্বাস 1.0
“Also in the fingerprint cm-1 region, it has been observed peaks at around 671 and 507 represent vibration of Ag-O metal oxides [22-24].”
Rupiasih 等 - 2019 - The Current-Voltage Properties of ChAgNP Composit DOI: 10.1088/1757-899X/515/1/012064 -
Alkyl C-H আত্মবিশ্বাস 1.0
“cm1 cm1 stretching at 671.43 and 892.51 The peaks at 834.50 and 798.47 indicate C-H”
Agrawal 等 - 2023 - Biotreatment of azo dye containing textile industr DOI: 10.21203/rs.3.rs-1876766/v2 -
Metal oxygen আত্মবিশ্বাস 1.0
“Tamilselvi et al., 2013 449cm-1, 511cm-1, 584cm-1, 3.3.1 Combined Effect of Methanol to Oil Molar Ratio observed major peaks at 671cm-1, confirmed and Catalyst Loading which the presence of Mg-O vibrations.”
Ameen 等 - 2022 - Biodiesel Synthesis From Cucumis melo Var. agresti DOI: 10.3389/fenrg.2022.830845 -
আত্মবিশ্বাস 1.0
“The absorption band at 671 is assigned to Ni-O-Si in calcined Ni 20/m-SiO 2, Ni 15Cu 5/m-SiO 2, Ni 10Cu 10/m-SiO 2, and Ni 5Cu 15/mcm-1”
Enhanced Cyclopentanone Yield from Furfural Hydrogenation: Promotional Effect of Surface Silanols on Ni-Cu/m-Silica Catalyst DOI: 10.3390/catal13030580 -
Alkene (C=C) আত্মবিশ্বাস 1.0
“[BBSQ-FeCl BBSQ-Cu2+ 3+] on ion,34 assigned to while the system Therefore,inordertoexploretheinteractionbetweenBBSQand Commons Downloaded [BBSQ-Cu2+], showed a peak at 671.3481, assigned to and Fe3+, Cu2+, Hg2+, and the metal chelator ethyl”
NIR squaraine dyes for dual colorimetric and fluorescent determination of Fe3+, Cu2+, and Hg2+ ions DOI: 10.1039/d3ra02419a
এই ব্যান্ডের সাথে একটি স্পেকট্রাম আছে?
আপনার FTIR স্পেকট্রাম আপলোড করুন এবং সেকেন্ডের মধ্যে একটি সম্পূর্ণ ব্যাখ্যা রিপোর্ট পান — সাহিত্য সাইটেশন সহ পিক অ্যাসাইনমেন্ট, লাইব্রেরি ম্যাচ এবং একটি আত্মবিশ্বাস-রেটেড এভিডেন্স চেইন।