What absorbs at 788 cm⁻¹ in an FTIR spectrum?

Raskt svar

A band near 788 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.

Mulige funksjonelle gruppe-tilordninger

Rangeringen gjenspeiler akkumulert litteraturbevis, ikke en enkelt autoritativ regel. Bekreft alltid mot prøvekonteksten din.

Mulige materialer

Materialer vises kun når samme litteraturbase støtter dette båndet og minst en annen karakteristisk topp.

Spektrum-logikk

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

Virkelig bruk

Denne typen forespørsel er vanlig i polymeridentifikasjon, screening av ukjent plast, feilsøking i kvalitetskontroll, verifisering av resirkulert materiale og litteraturstøttet gjennomgang av topptilordning.

Vanlige feil

• Behandle ett isolert bånd som bevis på et materiale uten å sjekke minst en eller to støttende topper.
• Ignorerer overlapping: flere funksjonelle grupper kan bidra nær samme bølgetall.
• Hopp over validering når tilsetningsstoffer, blandinger, oksidasjon eller forurensning kan forvrenge spekteret.

Verifiseringsråd

Når tvetydighet gjenstår, valider hypotesen med DSC, GC-MS eller TGA, spesielt for blandinger, nedbrutte prøver og fylte polymerer.

Litteratur bak disse tilordningene

• Silicon-oxygen (Si-O) konfidens 1.0

  “Various peaks 323 cm-1), were detected which correspond to O-Si-O stretching vibrations of silica group (788 -O324 cm-1), CH/C-O stretch for the O-CH and C-OH of sugar unit in cellulose (1034 OH in-plane 325”

  Balan 等 - 2021 - Esterification of residual palm oil using solid ac DOI: 10.1016/j.jtice.2012.07.001.
• konfidens 1.0

  “cm-1 The peak of 3372 denoted the vibrations of the silanol functional group and the peak at 986 cm-1 cm-1 due the Si-O stretching vibration while the peak at 788 represented calcium [43-44].”

  Design and synthesis of a new topical agent for halting blood loss rapidly: A multimodal chitosan-gelatin xerogel composite loaded with silica nanoparticles and calcium DOI: 10.1016/j.colsurfb.2020.111454
• Silicon (Si) konfidens 1.0

  “The peaks at 1139.24 cm-1 and 1095.99 cm-1 are assigned to stretching vibration of Si-O, the peaks at 1031.25 cm-1 and 1008.16 cm-1 are assigned to stretching vibration of Si(Al)-O, the peaks at 787.56 cm-1 and 761.71 cm-1 are assigned to s”

  Effects and Mechanism of Fe3+ on Flotation Separation of Feldspar and Epidote with Sodium Oleate at Natural pH DOI: 10.3390/separations9050110
• konfidens 1.0

  “In addition, two typical peaks located at 788 and 1260 attribute to N-H and C-N”

  Improvement of anti-corrosion performance of an epoxy coating using hybrid UiO-66-NH2/carbon nanotubes nanocomposite DOI: 10.1038/s41598-022-14854-y
• Alkene (C=C) konfidens 1.0

  “The peaks at 788 and 796 are associated with the vibration of the the stretching vibrations of the C=C and C=O bonds respectively.”

  Influence of the Alcoholic/Ethanolic Extract of Mangifera indica Residues on the Green Synthesis of FeO Nanoparticles and Their Application for the Remediation of Agricultural Soils DOI: 10.3390/molecules26247633
• konfidens 1.0

  “Functional Group 601.89 620.59 Bending vibration of Si-O 788.05 788.14”

  Data extraction of nano silica as a potential filler in nanocomposites from rice husk ash with ballmill and coprecipitation methods DOI: 10.1016/j.dib.2022.108656
• Silicon (Si) konfidens 1.0

  “Moreover, a Si-OH peak at 943 was documented, and the vibrational band ver, a Si-OH peak at 943 cm-1 was documented, and the vibrational band at 788 cm-1 corcm-1 at 788 corresponds to the Si-O-Si group.”

  Sustainable Remedy Waste to Generate SiO2 Functionalized on Graphene Oxide for Removal of U(VI) Ions DOI: 10.3390/su14052699
• konfidens 1.0

  “Al-OH bending 835 Al-Mg-OH deformation 835 Al-Mg-OH deformation 788 Si-O stretching of quartz 788”

  SO42-/Sn-MMT Solid Acid Catalyst for Xylose and Xylan Conversion into Furfural in the Biphasic System DOI: 10.3390/catal7040118