Eletrocromismo Ver também | Menu de navegaçãoexpandindo-o


Óptica


compostos químicoscarga elétricapolianilinaoxidaçãoeletroquímicaanilinaeletrodoácido clorídricoviologêniospolioxotungstatosóxido de tungstêniojanelas eletrocrômicas




Eletrocromismo é o fenômeno apresentado por alguns compostos químicos de mudança reversível de cor quando uma descarga de carga elétrica sobre ela é aplicada.


Um bom exemplo de uma material eletrocrômico é a polianilina a qual pode ser formada tanto pela oxidação eletroquímica o química da anilina. Se um eletrodo é imerso em ácido clorídrico o qual contenha uma pequena concentração de anilina, então um filme de polianilina pode se formar sobre o eletrode. Dependendo do estado redox, polianilina pode tanto ter cor amarelo pálida ou verde escuro a preto. Outos materiais eletrocrômicos tem encontrado aplicação tecnológica incluindo os viologênios (viologen) e polioxotungstatos. Outros materiais eletrocrômicos incluem o óxido de tungstênio (WO3), o qual é a principal substância que é usada na produção de janelas eletrocrômicas ou "janelas inteligentes".



Ver também |


  • Cromismo




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