Synthesis and properties of new paramagnetic hybrid bayerite from Al(0)/naphthalene dianhydride reaction
AUTOR(ES)
Triboni, Eduardo Rezende, Silva, Mauro Francisco Pinheiro da, Finco, Alan Teruel, Rodrigues, Magali Aparecida, Demets, Grégoire Jean-François, Dyszy, Fabio Henrique, Isolani, Paulo Celso, Berci Filho, Pedro, Politi, Mario José
FONTE
Materials Research
DATA DE PUBLICAÇÃO
2010-12
RESUMO
The reaction of Naphthalene 1,4,5,8-dianhydride (NTCDA) with elemental aluminum(0) powder is studied in an aqueous alcoholic KOH mixture to search for the NTCDA anion and dianion electron-adducts. After analyzing various reaction conditions it was found that the reaction yielded a greenish precipitate in 3:1 (v:v) ethanol:water mixture. This powder is composed mainly of aluminum trihydroxide crystallites of bayerite [α-Al(OH3)(s)] and the organic content is approximately 6%. This hybrid material proved to be paramagnetic even after exposure to air for one year and at temperatures up to 200 ºC. Typical carbonylic bound to metal IR bands and reflectance UV-VIS spectra demonstrate the entrapment of NTCDA radical anion into the aluminum trihydroxide, hence rendering its green color and a paramagnetic behavior. Thus, besides the understanding of an aluminum reaction in suspension, the entrapment of an organic material (NTCDA) that stays stable as the corresponding radical can provide an interesting option for the synthesis of aluminum trihydroxide composites.
Documentos Relacionados
- Electrochemical hydrogen-storage properties of La0.78Mg0.22Ni2.67Mn0.11Al0.11Co0.52-M1Ni3.5Co0.6Mn0.4Al0.5 composites
- Synthesis and Characterization of Hybrid Ni0.5Zn0.5Fe2O4@SiO2/chitosan
- Hydrogels of cellulose acetate crosslinked with pyromellitic dianhydride: part I: synthesis and swelling kinetics
- Virginicin, a New Naphthalene from Kosteletzkya virginica (Malvaceae)
- Substrate Specificities of Hybrid Naphthalene and 2,4-Dinitrotoluene Dioxygenase Enzyme Systems