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Structure and photoluminescence of di-amidosil nanohybrids incorporating europi...
Nunes, Sílvia; Zea Bermudez, V. de; Cybinska, J.; Ferreira, R. A. Sá; Carlos, Luís; Legedziewicz, J.; Silva, Maria Manuela; Smith, Michael JohnThe sol–gel process was used to prepare amorphous di-amide cross-linked alkyl/siloxane hybrid materials (di-amidosils) incorporating europium triflate (Eu(CF3SO3)3). Samples with 200 ≤ n ≤ 8 (where n is the molar ratio of carbonyl oxygen atoms per Eu3+ ion) were studied. The conformations of the alkyl chains of the host matrix in the doped di-amidosils (essentially gauche) are not affected by the presence of th...
Structure and photoluminescent features of di-amide cross-linked alkylene-silox...
Nunes, Sílvia; Zea Bermudez, V. de; Cybinska, J.; Ferreira, R. A. Sá; Carlos, Luís; Silva, Maria Manuela; Smith, Michael John; Ostrovskii, DavidNovel amide cross-linked alkylene/siloxane hybrid materials (di-amidosils) synthesized by the sol-gel process have been investigated. Two samples identified by the notation d-A(x) with x = 4 and 8 (where x is the number of methylene groups of the alkylene chain) have been produced as transparent, amorphous, rigid monoliths, thermally stable up to about 381 and 400 ºC, respectively. In the d-A(8) hybrid the sili...
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