Photoactive Zn(II)Porphyrin-multi-walled carbon nanotubes nanohybrids through covalent beta-linkages

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

Monika E Lipinska (Autor) Outra; Susana L H Rebelo (Autor) Outra; Fernando F R Pereira (Autor) FEUP; Jose L Figueiredo (Autor) FEUP; Cristina Freire (Autor) FCUP

Revista

Título: Materials Chemistry and Physics

Vol. 143

Páginas: 296-304

ISSN: 0254-0584

Editora: Elsevier

Indexação

ISI Web of Knowledge - 25 Citações

ISI Web of Science

Scopus - 25 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia dos materiais

Outras Informações

ID Authenticus: P-006-J4K

DOI: 10.1016/j.matchemphys.2013.09.002

Abstract (EN): Donor-acceptor nanohybrids by a covalent linkage between the beta-position of a Zn(II)Porphyrin and multi-walled carbon nanotubes are reported for the first time, in a closer analogy to the natural light harvesting systems, which are based on beta-substituted porphyrinoid structures, the chlorophylls. An unique and direct connection was established through the immobilization of the Zn(II)(beta-NH2-tetra-phenylporphyrin), using diazonium chemistry, in order to afford i) a short and conjugated linkage between the two aromatic systems and ii) an amide bond resulting from a three-step functionalization synthesis. Electronic and steady-state fluorescence spectroscopies confirmed high photoinduced electron communication through the beta-linkage when compared to analogous meso-phenyl linkers, stating its positive effect. The procedure involving the amide linkage allowed higher chromophore loadings; however, the direct conjugated bond showed improved photoinduced activity and a different emission pattern that can be associated with intense communication within the expanded pi-system MWCNT-metalloporphyrin.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9