The degradation of poly[2-methoxy-5-(2-ethylhexoxy)-1,4-phenylene vinylene] thin films studied by capacitance-voltage analysis and attenuated total reflection infrared spectroscopy

Biomimetic synthesis of microporous and mesoporous materials at room temperature and neutral pH, with application in electronics, controlled release of chemicals, and catalysis

“…18,19 One of the objectives in the preparation of the conducting organic polymers, as for instance poly-para-phenylenevinylene (PPV), is to prepare materials more stable towards oxidative degradation of their p conjugation. 20 This has been partially achieved by forming the PPV conducting polymer within the pores of zeolite Y. 21 Nevertheless, the method of preparation requires four consecutive steps: zeolite synthesis, calcination, monomer adsorption, and final polymerization.…”

Monomers That Form Conducting Polymers as Structure‐Directing Agents: Synthesis of Microporous Molecular Sieves Encapsulating Poly‐para‐phenylenevinylene

“…[5,7,8] One of the major drawbacks of most conducting polymers, and PPV in particular, is the high tendency to undergo degradation due to the oxidative degradation of their p conjugation. [9][10][11][12][13][14] Exposure of the conducting polymer to oxygen, moisture, and other nucleophiles must be avoided to minimize degradation and increase operation lifetime. In this context, it has been reported that PPV can be obtained inside aluminosilicates by adsorbing the monomer on a preformed porous material and effecting the polymerization under basic conditions.…”

“…[15][16][17] The resulting encapsulated PPV exhibits a remarkable protection from photochemical degradation in the open atmosphere, whereas analogous treatment of pure PPV produces rapid degradation to a very large extent. [9][10][11][12][13][14] However, PPV preparation inside the porous material was time-consuming, requiring the use of the performed microporous host and, then, four consecutive steps. Moreover, the loading of PPV inside the inorganic matrix was low (4-5 wt %).…”

Estudo da estrutura e dinâmica molecular em filmes de polifluorenos e correlações com a fotoluminescência

“…Entretanto, alguns dos principais problemas enfrentados pelos pesquisadores da área foram a facilidade com que os polímeros degradavam, seja devido ao excesso de luz (foto-degradação), seja devido ao excesso de oxigênio (degradação por oxidação) -o que ocasionava a perda das propriedades desejáveis [25][26][27][28][29] -e, principalmente, a dificuldade de obter polímeros que emitissem em regiões de alto band-gap (nas cores azul e violeta).…”