Bromine — FTIR absorption peaks and assignments

Quick answer

Bromine is usually assigned by looking for a recurring cluster of characteristic peaks rather than one exact textbook number. The table below shows where the literature most often places this group in FTIR, ranked by accumulated evidence.

Characteristic FTIR peaks for Bromine

Showing the 30 best-supported peaks of 78 total for Bromine.

Spectrum logic

A functional-group assignment becomes more reliable when several expected bands appear together. Use this page to find the strongest-supported peaks, then confirm that the same sample exhibits a coherent pattern rather than a single isolated hit.

Real-world usage

These pages are useful for unknown material analysis, peak explanation in reports, polymer troubleshooting, and verifying whether a candidate material family is chemically plausible.

Common mistakes

• Using one functional-group page as a complete material verdict without checking the rest of the spectrum.
• Assuming the strongest band is always the most diagnostic one.
• Forgetting that processing, additives, aging, and mixtures can shift or broaden expected peaks.

Verification advice

Use DSC, GC-MS, or TGA when several material families share similar bands or when mixture effects make the FTIR assignment uncertain.

Litteratur bakom dessa identifieringar

• 656 cm⁻¹ förtroende 1,0

  “The antioxidant activity of crude extract of cm-1 ammi The peak at 655.80 shows C-Br stretching.”

  Bawazeer 等 - 2021 - Synthesis, Characterization and Bioactivity Profil DOI: 10.22207/JPAM.15.2.11
• 1435 cm⁻¹ förtroende 1,0

  “12) exhibit dominant peaks at 1435 and 1714 The peak cm-1is (cid:3) at 1435 assigned to the 4(F) bending mode of Brönsted acid”

  Low-temperature selective catalytic reduction of NO with NH3 over V/ZrO2 prepared by flame-assisted spray pyrolysis: Structural and catalytic properties DOI: 10.1016/j.apcatb.2012.08.012
• 2930 cm⁻¹ förtroende 1,0

  “FT-IR characterization showed character at 2930.43 cm-1, and the disappearance of C-Br peak at 687.37 indicates the presence of long chain alkyl group and the replacement of Br with triphenylphosphonium.”

  Furoida 和 Ulfa - 2019 - Synthesis of 3-(7-triphenylphosphonioheptyl)-2,6-d DOI: 10.1088/1757-899X/546/6/062008
• 663 cm⁻¹ förtroende 1,0

  “The intense bands situated at about 663 and 1025cm-1 of wavelength were assigned to the stretching vibrational movement of C-Br and”

  Jing 等 - 2019 - Biosynthesis of copper oxide nanoparticles and the DOI: 10.1016/j.jphotobiol.2019.111557
• 414 cm⁻¹ förtroende 1,0

  “This is due to the formation of Ag/ (cid:3)C peak present at 414 corresponds to the melting of AgX which was used to increase the absorption of AgX (Br & F).”

  Lakshmanamoorthy 和 Manivannan - 2022 - Ionic liquids assist synthesis of AgAgX (X = Cl, DOI: 10.1007/s10854-021-06774-w
• 645 cm⁻¹ förtroende 1,0

  “The cm(cid:0) Br-C 1 sensitive PLA-naringin coaxial electrospun fiber membrane, was stored absorption peaks at 645, 506, and 3500 were caused by the ◦C, Br-C”

  Preparation of pH-sensitive polylactic acid-naringin coaxial electrospun fiber membranes for maintaining and monitoring salmon freshness DOI: 10.1016/j.ijbiomac.2021.08.087
• 3577 cm⁻¹ förtroende 1,0

  “O-H Two water stretching bands of BR at 3607 and 3577 cm-1 seen in the L minus BR difference spectrum are affected by mutation of Thr46 (27, 36).”

  Maeda 等 - 1999 - Chromophore-protein-water interactions in the L in DOI: 10.1021/bi9907072
• 405 cm⁻¹ förtroende 1,0

  “5 we have reinvestigate the infrared spectrum of the gaseous assigned to Mn C O bending vibrations and band observed at 425cm-1 sample of these compounds which are known to be pure, so that 416, 418, belong to Mn C axial stretching vibratio”

  Mahmood 等 - 2006 - Comparative vapour phase FTIR spectra and vibratio DOI: 10.1016/j.saa.2005.11.024