Chlorine — FTIR absorption peaks and assignments

Quick answer

Chlorine 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 Chlorine

Showing the 30 best-supported peaks of 171 total for Chlorine.

Possible materials

Spectrum logic

A functional-group assignment becomes more confident 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.

Literature behind these assignments

• 822 cm⁻¹ confidence 1.0

  “Larvicidal Property of Green Synthesized Silver Nanoparticles against Vector Mosquitoes 5 cm(cid:1)1), production would be an appropriate for extending the biologstretching 1388.16 aliphatic amine group (C-N stretchcm(cid:1)1), ical route f”

  Larvicidal property of green synthesized silver nanoparticles against vector mosquitoes (Anopheles stephensi and Aedes aegypti) DOI: 10.1016/j.jksus.2015.10.006
• 1328 cm⁻¹ confidence 1.0

  “-1 corresponding to vibration bands of CS-nZVI in the range of 40 0 - 40 0 0 cm .The broad and intense -1 -1 -H peak around 3394 cm correspond to the presence of O stretching from alcohol, 1632 cm is -1 -O -H attributed to H bending, the pe”

  Bottom-up approach synthesis of core-shell nanoscale zerovalent iron (CS-nZVI): Physicochemical and spectroscopic characterization with Cu(II) ions adsorption application DOI: 10.1016/j.mex.2020.100976
• 3362 cm⁻¹ confidence 1.0

  “A sharp peak at 802 cm-1 that H stretching vibrations peak was found at 3362 that belongs to the peak of C-Cl stretching.”

  Hasanuddin 等 - 2020 - Physicochemical Characterization and Controlled Re DOI: 10.22146/ijc.40921
• 1157 cm⁻¹ confidence 1.0

  “Furthermore, the addition of POM cm-1 into PVA-GA induces a slight increase in peak intensity at 1083 corresponds to C-O-C stretching cm-1 cm-1 vibration and new peaks at 1157 and 775 indicate the existence of -CN and -C-Cl stretching vibra”

  Hendrawanh 等 - 2019 - Poly (vinyl alcohol)glutaraldehydePremna oblongi DOI: 10.1088/1757-899X/509/1/012048
• 663 cm⁻¹ confidence 1.0

  “Peak at 663 Tensile tests were performed according to ASTM D638 corresponds to the C-Cl stretching in PVC chains.”

  Ibrahim 等 - 2011 - A study of poly vinyl chloridepoly(butylene adipa DOI: 10.1007/s10965-010-9486-1
• 3000 cm⁻¹ confidence 1.0

  “All membranes show similar absorption in the range of 3000 cm-1on both membrane shows vibration of C-Cl of PVC and presence H stretching [23].”

  Ismail 等 - 2015 - Effect of Radiation on Properties of ENRPVCSiO2 DOI: 10.1063/1.4931308
• 775 cm⁻¹ confidence 1.0

  “LLM confirmed rule peak-group candidate”

  Lee 等 - 2012 - Temperature dependence of the conductivity of plas DOI: 10.1007/s10008-011-1633-z
• 1255 cm⁻¹ confidence 1.0

  “The bands at 1255 and 964 cm-1 were ascribed to the C-C stretching and -CH2 vibration (Cl-C-H).”

  Understanding Hydrothermal Dechlorination of PVC by Focusing on the Operating Conditions and Hydrochar Characteristics DOI: 10.3390/app7030256