What absorbs at 3623 cm⁻¹ in an FTIR spectrum?

Brzi odgovor

A band near 3623 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.

Moguće dodjele funkcionalnih skupina

Rangiranje odražava akumulirane literaturne dokaze, a ne jedno autoritativno pravilo. Uvijek provjerite u kontekstu vašeg uzorka.

Mogući materijali

Materijali su prikazani samo kada ista literatura podržava ovu traku i barem jedan dodatni karakteristični vrh.

Logika spektra

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 3623 cm⁻¹ is usually not enough for material identification by itself.

Upotreba u stvarnom svijetu

Ova vrsta upita uobičajena je u identifikaciji polimera, probiru nepoznate plastike, rješavanju problema u kontroli kvalitete, provjeri recikliranog materijala i pregledu dodjele vrhova potkrijepljenom literaturom.

Uobičajene pogreške

• Tretiranje jedne izolirane vrpce kao dokaza materijala bez provjere barem jednog ili dva podržavajuća pika.
• Zanemarivanje preklapanja: više funkcionalnih skupina može doprinositi u blizini istog valnog broja.
• Preskakanje validacije kada aditivi, mješavine, oksidacija ili kontaminacija mogu izobličiti spektar.

Savjet za provjeru

Kada nejasnoća ostane, validirajte hipotezu pomoću DSC, GC-MS ili TGA, posebno za mješavine, degradirane uzorke i punjene polimere.

Literatura iza ovih dodjela

• pouzdanost 1,0

  “cm-1 cm-1 The sharp peaks at 3623.22 and 3702.31 were ascribed to the inner surface N-H stretching and inner hydroxyl group with higher amount of Al-OH in the octahedral sheet, respectively.”

  Preparation and characterization of adsorbents derived from bentonite and kaolin clays DOI: 10.1007/s13201-018-0827-2
• Hydroxyl (O-H) pouzdanost 1,0

  “In the 1), FTIR spectrum of the halloysite clay mineral sample (spectrum the peaks at 3698 and cm-1 3623 were due to the stretching vibrations of the OH groups of the Al-OH.”

  Enhancing the Thermal Stability of Ionogels: Synthesis and Properties of Triple Ionic Liquid/Halloysite/MCC Ionogels DOI: 10.3390/molecules26206198
• Hydrogen bond pouzdanost 1,0

  “Comparing the hydrogen bonding carboxylic acid O-H stretching appeared spectrum of the nanocomposite with the spectrum of the 3623cm-1.”

  Alkurdi 等 - 2022 - Development and Evaluation of a Novel Polymer Drug DOI: 10.1155/2022/7903310
• Hydroxyl (O-H) pouzdanost 1,0

  “3697 O-H stretching 3623 O-H stretching 3440 O-H stretching, hydration”

  Caccamo 等 - 2020 - Self-Assembly Processes in Hydrated Montmorillonit DOI: 10.3390/ma13051100
• Hydroxyl (O-H) pouzdanost 1,0

  “The stretching cm-1 region shows the typically broad band at 3623 assigned to the vibrations of the region shows the typically broad band at 3623 cm-1 assigned to the vibrations of the OH”

  The Antimicrobial Properties of Modified Pharmaceutical Bentonite with Zinc and Copper DOI: 10.3390/pharmaceutics13081190
• Hydroxyl (O-H) pouzdanost 0,9

  “Explicit assignment: 'υOH at 3623 cm-1'”

  The Influence of Long-Time Storage on the Structure and Properties of Multi-Block Thermoplastic Polyurethanes Based on Poly(butylene adipate) Diol and Polycaprolactone Diol DOI: 10.3390/ma16020818