Multinuclear magnetic resonance study on aluminium sec-butoxide chelated with ethyl acetoacetate in various amounts
Reactive aluminum alkoxide (ASB, aluminium sec-butoxide) was chelated using β-diketone (EAA, ethyl acetoacetate) in order to gain control over rapid hydrolysis in the course of the sol-gel process. Derived chelates were analysed using several NMR spectroscopic techniques: one-dimensional 1H, 13C, 27...
| Permalink: | http://skupni.nsk.hr/Record/nsk.NSK01001074251/Details |
|---|---|
| Matična publikacija: |
Croatica chemica acta (Online) 92 (2019), 1 ; str. 17-28 |
| Glavni autori: | Kurajica, Stanislav (Author), Gazivoda Kraljević, Tatjana, Mali, Gregor, Mandić, Vilko, Minga, Iva |
| Vrsta građe: | e-članak |
| Jezik: | eng |
| Predmet: | |
| Online pristup: |
https://doi.org/10.5562/cca3426 Hrčak |
| LEADER | 02554naa a22003854i 4500 | ||
|---|---|---|---|
| 001 | NSK01001074251 | ||
| 003 | HR-ZaNSK | ||
| 005 | 20201102110556.0 | ||
| 006 | m d | ||
| 007 | cr|||||||||||| | ||
| 008 | 200916s2019 ci d |o |0|| ||eng | ||
| 024 | 7 | |2 doi |a 10.5562/cca3426 | |
| 035 | |a (HR-ZaNSK)001074251 | ||
| 040 | |a HR-ZaNSK |b hrv |c HR-ZaNSK |e ppiak | ||
| 041 | 0 | |a eng |b eng | |
| 042 | |a croatica | ||
| 044 | |a ci |c hr | ||
| 080 | 1 | |a 54 |2 2011 | |
| 100 | 1 | |a Kurajica, Stanislav |4 aut | |
| 245 | 1 | 0 | |a Multinuclear magnetic resonance study on aluminium sec-butoxide chelated with ethyl acetoacetate in various amounts |h [Elektronička građa] / |c Stanislav Kurajica, Tatjana Gazivoda Kraljević, Gregor Mali, Vilko Mandić, Iva Minga. |
| 300 | |b Graf. prikazi. | ||
| 504 | |a Bibliografija: 26 jed. | ||
| 504 | |a Summary. | ||
| 520 | |a Reactive aluminum alkoxide (ASB, aluminium sec-butoxide) was chelated using β-diketone (EAA, ethyl acetoacetate) in order to gain control over rapid hydrolysis in the course of the sol-gel process. Derived chelates were analysed using several NMR spectroscopic techniques: one-dimensional 1H, 13C, 27Al NMR and two-dimensional COSY, HSQC and DOSY. The NMR analysis enabled identification of the formed chelate species, as well as determination of their quantitative relationships. Several complexation products were observed: tris-chelated monomer, Al(EAA)3, bis-chelated dimmer, Al2(OnBu)4(EAA) 2, tris-chelated dimmer, Al2(OnBu)3(EAA)3, tetra-chelated dimmer, Al2(OnBu)2(EAA)4, and monochelated trimer, Al3(OnBu)8(EAA). Of the formed oligomer compounds, this is the first evidence of Al2(OR)3L3 in any alkoxide and β-ketoester or β-diketone combination. Aluminium sec-butoxide and ethyl acetoacetate complexes Al2(OnBu)4(EAA) 2 and Al2(OnBu)2(EAA)4 were also observed for the first time. With the increase of the EAA/ASB ratio the coordination of aluminium shifts towards six, whereas above the EAA/ASB ratio of 2.5 solely six-coordinated aluminium exists. | ||
| 653 | 0 | |a Aluminij sec-butoksid |a Magnetska rezonancija |a NMR spektroskopija |a Etil acetoacetat |a Sol-gel postupak | |
| 700 | 1 | |a Gazivoda Kraljević, Tatjana |4 aut | |
| 700 | 1 | |a Mali, Gregor |4 aut | |
| 700 | 1 | |a Mandić, Vilko |4 aut | |
| 700 | 1 | |a Minga, Iva |4 aut | |
| 773 | 0 | |t Croatica chemica acta (Online) |x 1334-417X |g 92 (2019), 1 ; str. 17-28 |w nsk.(HR-ZaNSK)000255036 | |
| 981 | |b Be2019 |b B05/19 | ||
| 998 | |b dalo2011 | ||
| 856 | 4 | 0 | |u https://doi.org/10.5562/cca3426 |
| 856 | 4 | 0 | |u https://hrcak.srce.hr/216310 |y Hrčak |
| 856 | 4 | 1 | |y Digitalna.nsk.hr |