Thiol — FTIR absorption peaks and assignments

Quick answer

Thiol 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 Thiol

Showing the 30 best-supported peaks of 113 total for Thiol.

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

• 980 cm⁻¹ confidence 1.0

  “The appearance of new peaks around 975-985 and Accepted 1 May 2011 of cement paste has been attributed to the formation of two principal hydration products (C-S-H) and Available online 13 May 2011 2,respectively.Thereisastrongresemblanceofp”

  Theoretical and experimental study of structures and properties of cement paste The nanostructural aspects of C–S–H DOI: 10.1016/j.jpcs.2011.05.001
• 2043 cm⁻¹ confidence 1.0

  “The new intense and strong peak that emerged at 2043 cm-1 is related to aromatic SH+ 4+ As one of four in the tetrahedral NH connected to the nitrogen atom is weakly bound, H+ C = n stretching of SCNof the salt, while its intensity is shift”

  Characteristics of a Plasticized PVA-Based Polymer Electrolyte Membrane and H+ Conductor for an Electrical Double-Layer Capacitor: Structural, Morphological, and Ion Transport Properties DOI: 10.3390/membranes
• 2360 cm⁻¹ confidence 1.0

  “The medium doublet bands around 2360 revealed the typical S-H stretching of L-cysteine amino acid, which suggested the possible”

  Mesoporous magnetite nanoparticles synthesis using the Peltophorum pterocarpum pod extract, their antibacterial efficacy against pathogens and ability to remove a pollutant dye DOI: 10.1016/j.molstruc.2018.10.042
• 2856 cm⁻¹ confidence 1.0

  “The spectrometer was Fe3+ 2122 blanked with air at room temperature for the raw samples or with a 2550-2590 Cys S-H stretch 2856 Methylene C-H stretch clean piece of the white cotton T-shirt or white copier paper for 2920”

  Elkins - 2011 - Rapid Presumptive Fingerprinting of Body Fluids DOI: 10.1111/j.1556-4029.2011.01870.x
• 470 cm⁻¹ confidence 1.0

  “The second silicate bands are 4 cm-1 in C-S-H broadly characterized as O-Si-O deformation or bending modes, which occur near 451 470cm-1 cm-1 667cm-1 and in C-A-S-H and the band 663 or is due to Si-O-Si bending vibrations.”

  He 等 - 2011 - Morphology and Structure of Aluminum Substituted C DOI: 10.4028/www.scientific.net/AMR.287-290.1193
• 3416 cm⁻¹ confidence 1.0

  “LLM confirmed rule peak-group candidate”

  Ibrahim 等 - 2022 - Effect of Ammonium Sulfide on Sulfidization Flotat DOI: 10.3390/min12101193
• 1711 cm⁻¹ confidence 1.0

  “Spectrum of TAX cc cm-1 shows prominent peaks at 1711,2516 and 1031 which is assigned to Ester (C = O) linkage, A -SH stretching and C-O-C bond.”

  Ijaz 等 - 2019 - Thiolation of arabinoxylan and its application in DOI: 10.1080/03639045.2019.1569041
• 2545 cm⁻¹ confidence 1.0

  “Disappearance of thiol stretching peak indicates binding”

  Ismail 等 - 2016 - Synthesis, Characterization and DNA Cleavage of Co DOI: 10.4314/tjpr.v15i3.23