Chitosan — FTIR absorption peaks and assignments

빠른 답변

Chitosan 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 Chitosan

Showing the 30 best-supported peaks of 149 total for Chitosan.

스펙트럼 로직

여러 예상 밴드가 함께 나타날 때 작용기 할당이 더 신뢰할 수 있습니다. 이 페이지를 사용하여 가장 강력하게 지지되는 피크를 찾은 다음, 동일한 샘플이 단일 고립된 히트가 아닌 일관된 패턴을 보이는지 확인하세요.

실제 사용

이 페이지는 미지 물질 분석, 보고서의 피크 설명, 폴리머 문제 해결, 후보 물질군이 화학적으로 타당한지 확인하는 데 유용합니다.

일반적인 실수

• 스펙트럼의 나머지 부분을 확인하지 않고 하나의 기능 그룹 페이지를 완전한 재료 판정으로 사용하는 것.
• 가장 강한 밴드가 항상 가장 진단적이라고 가정합니다.
• 가공, 첨가제, 노화 및 혼합물이 예상 피크를 이동시키거나 넓힐 수 있다는 것을 잊는 것.

검증 조언

여러 물질군이 유사한 밴드를 공유하거나 혼합 효과로 FTIR 할당이 불확실할 때 DSC, GC-MS 또는 TGA를 사용하십시오.

이 할당의 배경이 되는 문헌

• 2361 cm⁻¹ 신뢰도 1.0

  “A signal at 1737 on chitosan spectrum was attributed to the carboxylic (C=O) groups T 2361cm-1 overlapped by MPEO incorporation.”

  Mentha piperita essential oils loaded in a chitosan nanogel with inhibitory effect on biofilm formation against S. mutans on the dental surface DOI: 10.1016/j.carbpol.2019.02.018
• 2071 cm⁻¹ 신뢰도 1.0

  “3(b) that the introcm-1 the contact ion-pairs, the band at 2071 is attributed to the duction of the phthalimido group into the chitosan backbone has 2033cm-1 reflection triple ion aggregates and the band at is assigned to the disrupted the”

  Synthesis and characterizations of phthaloyl chitosan-based polymer electrolytes DOI: 10.1016/j.jnoncrysol.2012.04.019
• 2908 cm⁻¹ 신뢰도 1.0

  “The peak at 2908.04 corresponded to cm(cid:2)1 Chitosan film CeH the stretching, while the band at 1335.74 was OeH the of water.”

  Bourtoom 和 Chinnan - 2008 - Preparation and properties of rice starch-chitosan DOI: 10.1016/j.lwt.2007.10.014
• 2878 cm⁻¹ 신뢰도 1.0

  “The band at cm(cid:1)1 gelthestraincurvedisplaysajumpofthestrainvalueinresponse of chitosan corresponding to the C-H vibration, is 2878 OF cm(cid:1)1”

  Chakraborty 等 - 2012 - Improved mechanical and photophysical properties o DOI: 10.1039/c2jm33995a
• 3000 cm⁻¹ 신뢰도 1.0

  “Because the concentrated acids clean samples from any bands above 3000 are related to the overlap of the stretching impurity, which give chitosan more opportunities for recrystallization vibration of the OH and NH bonds [35, 36].”

  A comparison of chitosan properties after extraction from shrimp shells by diluted and concentrated acids DOI: 10.1016/j.heliyon.2020.e03486
• 3438 cm⁻¹ 신뢰도 1.0

  “Figure 1C, for the hybrid brid chitosan-CuO nanocomposite, showed the noisy shape with the presence of the broad chitosan-CuO nanocomposite, showed the noisy shape with the presence of the broad band at 3438 cm-1 and the two characteristic”

  Chitosan Capped Copper Oxide Nanocomposite: Efficient, Recyclable, Heterogeneous Base Catalyst for Synthesis of Nitroolefins DOI: 10.3390/catal12090964
• 3426 cm⁻¹ 신뢰도 1.0

  “Based on the FTIR spectra of the cm-1 chitosan membrane in Figure 2 showed that it has a wide absorption at 3425.58 that indicates the cm-1 vibration stretching -OH group.”

  Hastuti 和 Assya'adha - 2020 - Synthesis and Characterization of Chitosan Membran DOI: 10.1088/1757-899X/833/1/012068
• 3621 cm⁻¹ 신뢰도 1.0

  “FTIR spectrum presented significant peaks at 3621 1013 was attributed to chitosan, Accepted: 11October2022 cm-1 29Si, 27Al, 13H and 787 signified the stretching of Si-O-Si on HNT.”

  Synthesis and Optimization of Superhydrophilic-Superoleophobic Chitosan–Silica/HNT Nanocomposite Coating for Oil–Water Separation Using Response Surface Methodology DOI: 10.3390/nano12203673