Ring structure — Puncak serapan FTIR dan tugasan

Jawapan pantas

Ring structure biasanya ditetapkan dengan mencari kelompok berulang puncak ciri dan bukan satu nombor tepat buku teks. Jadual di bawah menunjukkan di mana literatur paling kerap meletakkan kumpulan ini dalam FTIR, yang disusun mengikut bukti terkumpul.

Puncak FTIR ciri untuk Ring structure

Menunjukkan 30 puncak terbaik disokong daripada 812 jumlah untuk Ring structure.

Logik spektrum

Tugasan kumpulan berfungsi menjadi lebih yakin apabila beberapa jalur yang dijangkakan muncul bersama. Gunakan halaman ini untuk mencari puncak yang paling disokong, kemudian sahkan bahawa sampel yang sama menunjukkan corak yang koheren dan bukannya satu hit terpencil.

Penggunaan dunia sebenar

Halaman-halaman ini berguna untuk analisis bahan yang tidak diketahui, penjelasan puncak dalam laporan, penyelesaian masalah polimer, dan mengesahkan sama ada keluarga bahan calon adalah boleh dipercayai secara kimia.

Kesilapan biasa

• Menggunakan satu halaman kumpulan berfungsi sebagai keputusan bahan lengkap tanpa memeriksa spektrum yang lain.
• Dengan menganggap jalur yang paling kuat sentiasa menjadi yang paling diagnostik.
• Melupakan bahawa pemprosesan, bahan tambahan, penuaan, dan campuran boleh mengalihkan atau melebarkan puncak yang dijangkakan.

Nasihat pengesahan

Gunakan DSC, GC-MS, atau TGA apabila beberapa keluarga bahan berkongsi jalur yang serupa atau apabila kesan campuran menyebabkan tugasan FTIR tidak pasti.

Literatur di sebalik penetapan ini

• 1600 cm⁻¹ keyakinan 1.0

  “For the drug QF, FT-IR analysis showed the characteristic 51 cm@1 peaks at 1600, 766 and 745 which are attributed to 52 presence of substituted benzene ring.”

  Arikibe 等 - 2019 - pH-Responsive Studies of Bacterial CelluloseChito DOI: 10.1002/slct.201902290
• 1514 cm⁻¹ keyakinan 1.0

  “The most intense bands were the carbonyl peak at 1672 cm-1 and the benzene ring stretching at 1514, 1477, and 1392 cm-1.”

  Armenta 等 - 2005 - FTIR approaches for diuron determination in commer DOI: 10.1021/jf050268f
• 810 cm⁻¹ keyakinan 1.0

  “It is worth mentioning that the peak at 810 (figure 8(c)) which corresponds to 27 28 the epoxy ring in AESO structure has gradually become weaker and almost disappeared after 30”

  Ataei 等 - 2020 - Electrosprayed PMMA microcapsules containing green DOI: 10.1088/1361-665X/ab9754
• 1161 cm⁻¹ keyakinan 1.0

  “cm-1, due to Meanwhile, the presence of electron-withdrawing bromines in Meanwhile, the intense peaks at 1161 and 1042 υ(CCC) compound (2), reduced the electron density in the phenylene ring stretching vibration of long linear dioctyloxy ch”

  Synthesis of a novel 1,4‐bis[2‐(5‐thiophen‐2‐yl)‐1‐benzothiophene]‐2,5‐dioctyloxybenzene pentamer for creatinine detection. DOI: 10.1002/ajoc.202100374
• 1628 cm⁻¹ keyakinan 1.0

  “A strong band at 1628 cm-1 can also be assigned to the C=C stretch in the ring and the C=O stretch in polyphenols [18,19].”

  Aziz 等 - 2017 - From Insulating PMMA Polymer to Conjugated Double DOI: 10.3390/polym9110626
• 3192 cm⁻¹ keyakinan 1.0

  “The bands at 3089 and cm-1 δ, tributors, although from tan it is the high level DMSO and 3192 correspond to the N-H stretch of the Ba ring.”

  Conductivity or rheology? Tradeoff for competing properties in the fabrication of a gel polymer electrolyte based on chitosan-barbiturate derivative DOI: 10.1007/s11581-018-2515-5
• 913 cm⁻¹ keyakinan 1.0

  “The FTIR of cured epoxy shows ring opening by the disappearance of oxirane ring peak at 913 whereas X-ray diffraction shows its amorphous phase in the cured state.”

  Influence of amine‐terminated additives on thermal and mechanical properties of diglycidyl ether of bisphenol A (DGEBA) cured epoxy DOI: 10.1002/app.48404
• 1176 cm⁻¹ keyakinan 1.0

  “spectra of the PDPA in doped state, these being peaked at 1176, 1201, 1368, 1541 and 1603 These Raman lines were attributed to vibrational modes of C-H bending in benzene ring, C-N stretching, semi-quinoid”

  Baibarac 等 - 2019 - Adsorption of 1,4-phenylene diisothiocyanate onto DOI: 10.1038/s41598-019-48314-x