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

• Type: Article in International Scientific Journal
• Date: 2013

Authors

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

Journal

Title: Materials Chemistry and Physics

Vol. 143

Pages: 296-304

ISSN: 0254-0584

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 25 Citations

ISI Web of Science

Scopus - 25 Citations

Scientific classification

FOS: Engineering and technology > Materials engineering

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9