title: Syntheses, spectroscopic and AFM characterization of some manganese porphyrins and their hybrid silica nanomaterials.
abstract: The present work is concerned with the manganese complexes of 5,10,15,20-tetraphenylporphyrin and of 5,10,15,20-tetra(3-hydroxyphenyl)porphyrin, which were prepared by metallation of the corresponding porphyrin ligands, and the study of their spectroscopic and photophysical behavior under strongly acidic and alkaline conditions. The second objective was to obtain and study some new hybrid materials, with special optoelectronic and surface properties, by impregnation of silica gels obtained by one step acid and by two steps acid-base catalysis with these Mn-porphyrins. The resulting nanomaterials exhibited interesting bathochromic and hyperchromic effects of their second band in the emission spectra in comparison with the Mn-porphyrins and also they have distinct orientation of the aggregates on surfaces, as shown by AFM images, making them useful for applications in medicine, formulation of sensors and for environmental-friendly catalysts for photodegradation of organic compounds.
authors.affiliation: Institute of Chemistry Timisoara of Romanian Academy, Timisoara, Romania. efagadar@yahoo.com
authors.forename: Eugenia
authors.initials: E
authors.lastname: Fagadar-Cosma
authors.forename: Marius Constantin
authors.initials: MC
authors.lastname: Mirica
authors.forename: Ionel
authors.initials: I
authors.lastname: Balcu
authors.forename: Carmen
authors.initials: C
authors.lastname: Bucovicean
authors.forename: Carmen
authors.initials: C
authors.lastname: Cretu
authors.forename: Ileana
authors.initials: I
authors.lastname: Armeanu
authors.forename: Gheorghe
authors.initials: G
authors.lastname: Fagadar-Cosma
mesh_terms: D008345:Manganese / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D015394:Molecular Structure; D049329:Nanostructures / Q000737:chemistry*; D010316:Particle Size; D011166:Porphyrins / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D012997:Solvents; D013499:Surface Properties
chemical_list: C509964:5,10,15,20-tetraphenylporphyrin; D011166:Porphyrins; D012997:Solvents; C051233:5,10,15,20-tetra(3-hydroxyphenyl)porphyrin; D008345:Manganese; D012822:Silicon Dioxide