No abstract

Two new fullerene ligands have been designed to provide relatively simple frameworks to build supramolecular systems containing both fullerene and Zn-porphyrin moieties. The coordination of the fullerene ligands to the Zn-porphyrin was supported by UVevis titration, nuclear magnetic resonance and electrochemical data. The resulting spectrophotometric data were processed both graphically and computationally to yield the stoichiometry, stability constant, and molar absorptivity of the species in equilibrium.

Três polímeros e dois novos copolímeros baseados em derivados de politiofenos 3-substituídos têm sido estudados e todos demonstraram propriedades fotoluminescentes. Todos os polímeros sintetizados, poli(3-metoxitiofeno) (PMOT), poli(3-tiofenoetanol) (PTE), poli(3-tiofenometanol) (PTM), e copolímeros, poli(3-metoxitiofeno-co-3-tiofenoetanol) (PMOT-co-TE) e poli(3-metoxitiofeno-co-3-tiofenometanol) (PMOT-co-TM), foram caracterizados por FT IR, UV-Vis, fotoluminescência (PL), análise térmica (TG e DSC) e difração de raios X. Todos os materiais mostraram emissão de luz na região do laranja do espectro visível. A obtenção dos polímeros e copolímeros foi confirmada por análise espectrométrica na região do infravermelho. A análise térmica mostrou boa estabilidade térmica para os materiais obtidos.This work reports the synthesis of three polymers and two new copolymers based on 3-substituted polythiophene derivatives, all of them demonstrated photoluminescent properties. All polymers synthesized, i.e., poly(3-methoxythiophene) (PMOT), poly(3-thiopheneethanol) (PTE), poly(3-thiophenemethanol) (PTM), poly(3-methoxythiophene-co-3-thiopheneethanol) (PMOT-co-TE) and poly(3-methoxythiophene-co-3-thiophenemethanol) (PMOT-co-TM), were characterized by FT IR, UV-Vis, photoluminescence (PL), thermal analysis (TG and DSC) and X-ray diffraction (XRD). All materials emitted light in the orange region of the visible spectrum. Spectrometric analysis in the infrared region demonstrated the successful synthesis of polymers and copolymers by the presence of characteristic bands. Thermal analysis showed that the obtained materials had good thermal stability.