Nanometrological porphyrins.
Summary of "Nanometrological porphyrins."
A new cationic silver N-alkylpyridylporphyrin complex is able to 'sense' nanometric conductive particles with a diameter below 10 nm. The luminescence of the molecule changes its maximum from red to blue when it embraces a conductive (metallic or semiconducting) nanoparticle. The change is explained on the basis of a charge transfer between the molecule and the conductive nanoparticle along with a geometrical distortion of the porphyric ring and pyridinium substituents. This new molecule could be used to sense nanoparticle contamination in the environment, in the industry of heterogeneous catalysis and many other branches of nanometrological applications.
Affiliation
Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte-MG, 31270-901, Brazil.
Journal Details
This article was published in the following journal.
Name: Nanotechnology
ISSN: 1361-6528
Pages: 275504
Links
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/22710428
- DOI: http://dx.doi.org/10.1088/0957-4484/23/27/275504
Medical and Biotech [MESH] Definitions
Metalloporphyrins
Porphyrins which are combined with a metal ion. The metal is bound equally to all four nitrogen atoms of the pyrrole rings. They possess characteristic absorption spectra which can be utilized for identification or quantitative estimation of porphyrins and porphyrin-bound compounds.
Porphyrins
A group of compounds containing the porphin structure, four pyrrole rings connected by methine bridges in a cyclic configuration to which a variety of side chains are attached. The nature of the side chain is indicated by a prefix, as uroporphyrin, hematoporphyrin, etc. The porphyrins, in combination with iron, form the heme component in biologically significant compounds such as hemoglobin and myoglobin.
Etioporphyrins
Porphyrins with four methyl and four ethyl side chains attached to the pyrrole rings.
Porphyrinogens
Colorless reduced precursors of porphyrins in which the pyrrole rings are linked by methylene (-CH2-) bridges.
Deuteroporphyrins
Porphyrins with four methyl and two propionic acid side chains attached to the pyrrole rings.
PubMed Articles
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