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• Fagadar-Cosma, E
• Mirica, M
• Balcu, I
• Bucovicean, C
• Cretu, C
• Armeanu, I
• Fagadar-Cosma, G
• [+] on Google Scholar
• Fagadar-Cosma, E
• Mirica, M
• Balcu, I
• Bucovicean, C
• Cretu, C
• Armeanu, I
• Fagadar-Cosma, G
• [+] on PubMed
• Fagadar-Cosma, E
• Mirica, M
• Balcu, I
• Bucovicean, C
• Cretu, C
• Armeanu, I
• Fagadar-Cosma, G

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Molecules 2009, 14(4), 1370-1388; doi:10.3390/molecules14041370

Article

Syntheses, Spectroscopic and AFM Characterization of Some Manganese Porphyrins and Their Hybrid Silica Nanomaterials

Eugenia Fagadar-Cosma ^1,* , Marius Constantin Mirica ² , Ionel Balcu ² , Carmen Bucovicean ¹ , Carmen Cretu ¹ , Ileana Armeanu ¹  and Gheorghe Fagadar-Cosma ³

¹ Institute of Chemistry Timisoara of Romanian Academy, 24 M. Viteazul Ave, 300223-Timisoara, Romania ² National Institute of Research for Electrochemistry and Condensed Matter, Timisoara, 144 Aurel Paunescu Podeanu Street, 300860-Timisoara, Romania ³ \"Politehnica\" University of Timisoara, 2 T. Lalescu Street, 300223-Timisoara, Romania

* Author to whom correspondence should be addressed.

Received: 23 February 2009; in revised form: 19 March 2009 / Accepted: 26 March 2009 / Published: 27 March 2009

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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.

Keywords: Porphyrins; Mn(III)-metalloporphyrins; Hybrid silica nanomaterials; AFM; Spectroscopy

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