Urea — Puncak serapan FTIR dan tugasan
Ini ialah nombor gelombang FTIR ciri apabila Urea cenderung menyerap, yang dihimpunkan daripada literatur yang diterbitkan dan diperingkat berdasarkan bukti sokongan. Setiap penetapan boleh dijejaki kepada sumber (DOI) dan disahkan silang terhadap 320,000+ spektrum rujukan serta graf pengetahuan kami.
Disokong oleh 8 sumber yang dipetik
Jawapan pantas
Urea 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 Urea
| Nombor gelombang (cm⁻¹) | Fakta sokongan | Sumber dipetik | Keyakinan tertinggi |
|---|---|---|---|
| 1619 | 2 | 2 | 1.0 |
| 1450 | 2 | 2 | 1.0 |
| 3300 | 2 | 2 | 1.0 |
| 1635 | 2 | 2 | 1.0 |
| 1639 | 2 | 2 | 1.0 |
| 1640 | 2 | 2 | 1.0 |
| 1645 | 1 | 1 | 1.0 |
| 1707 | 1 | 1 | 1.0 |
| 1682 | 1 | 1 | 1.0 |
| 2063 | 1 | 1 | 1.0 |
| 1647 | 1 | 1 | 1.0 |
| 3335 | 1 | 1 | 1.0 |
| 1582 | 1 | 1 | 1.0 |
| 1107 | 1 | 1 | 1.0 |
| 1663 | 1 | 1 | 1.0 |
| 1587 | 1 | 1 | 1.0 |
| 1057 | 1 | 1 | 1.0 |
| 1658 | 1 | 1 | 1.0 |
| 1686 | 1 | 1 | 1.0 |
| 1065 | 1 | 1 | 1.0 |
| 1650 | 1 | 1 | 1.0 |
| 1634 | 1 | 1 | 1.0 |
| 1685 | 1 | 1 | 1.0 |
| 1703 | 1 | 1 | 1.0 |
| 2850 | 1 | 1 | 1.0 |
| 3100 | 1 | 1 | 1.0 |
| 1670 | 1 | 1 | 1.0 |
| 3410 | 1 | 1 | 1.0 |
| 2918 | 1 | 1 | 1.0 |
| 3351 | 1 | 1 | 1.0 |
Menunjukkan 30 puncak terbaik disokong daripada 56 jumlah untuk Urea.
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
-
1623 cm⁻¹ keyakinan 1.0
“Because urea and ChCL intermolecular hydrogen interactions are formed, the stretching vibration of NH2 at 1662 cm-1 and the asymmetric vibration of NH2 at 1606 cm-1 in the FTIR spectra of urea shifted to 1663 and 1623 cm-1, respectively, in”
Can 等 - 2023 - Choline Chloride-Based Deep Eutectic Solvent-Treat DOI: 10.3390/f14030569 -
1635 cm⁻¹ keyakinan 1.0
“The prominent bonded cm-1 band centred at 1635 corresponds to the hydrogen-bonded ordered urea carbonyl [27].”
Hydrogen bonding and thermomechanical properties of model polydimethylsiloxane based poly(urethane-urea) copolymers: Effect of hard segment content DOI: 10.1016/j.porgcoat.2015.06.015 -
1640 cm⁻¹ keyakinan 1.0
“Furthermore, the sharp peak at 1640 cm-1, amine-isocyanate generated by the ing at 1640 is attributed to the urea bond created by the reaction reaction, could not be found in the spectrum of the between the amine group and HDI.”
Cohn 和 Stern - 2000 - Sequential surface derivatization of PET films DOI: 10.1021/ma9900784 -
2060 cm⁻¹ keyakinan 1.0
“3458cm21 17 Local base lines for the urea peak at and the thiocyanate peak 2060cm21 2551cm21 07:56 at were drawn by hand using the points at 3711 and for 1930cm21 the urea peak and 2319 and for the thiocyanate peak, respectively.”
Furlan 等 - 2004 - FTIR analysis of mouse urine urea using IR cards DOI: 10.1081/SL-120038766 -
1639 cm⁻¹ keyakinan 1.0
“Small band at 1639 belongs to carbonyl (-C=O) with C=O-NH arrangements of traces of urea which may be present due to the reaction of excess isocyanate with moisture in air.”
Preparation and characterization of aliphatic polyurethane and modified hydroxyapatite composites for bone tissue engineering DOI: 10.1007/s00289-019-03067-5 -
1690 cm⁻¹ keyakinan 1.0
“1690cm-1 absence of peaks at The PU was cast onto the screen-printed electrode (SPE) representing urea (C=O) in and analyzed using a single voltammetric cycle between this study indicated there is no urea formation as a bypro- -1200 and +15”
Design and Synthesis of Conducting Polymer Bio-Based Polyurethane Produced from Palm Kernel Oil DOI: 10.1155/2022/6815187 -
1640 cm⁻¹ keyakinan 1.0
“The H-bonded urea (1640 cm-1) occurring first followed by the free urethane reveals by the free urethane reveals that urea followed the first-order reaction [2].”
Effects of NCO/OH Ratios on Bio-Based Polyurethane Film Properties Made from Acacia mangium Liquefied Wood DOI: 10.3390/polym15051154 -
3197 cm⁻¹ keyakinan 1.0
“The peak at 3197 is attributed to the overtone of the C=O stretching in urea which is also in Fermi resonance with the N-H stretching mode (Perkins, Painter et al.”
Ternary natural deep eutectic solvent (NADES) infused phthaloyl starch as cost efficient quasi-solid gel polymer electrolyte DOI: 10.1016/j.carbpol.2017.03.023
Lihat Urea dalam spektrum anda sendiri
Muat naik spektrum FTIR anda dan dapatkan laporan tafsiran penuh — tugasan puncak dengan petikan literatur, padanan perpustakaan, dan analisis berasaskan literatur — dalam beberapa saat.