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Advanced silica-matrix material entrapping a hydroxysubstituted porphyrin compound. Synthesis and characterization

E. FAGADAR-COSMA1,* , C. SAVII1, C. ENACHE1, C. IONESCU1, R. RADU1, GH. FAGADAR-COSMA2, S. FARCAS3

Affiliation

  1. Institute of Chemistry –Timişoara of Romanian Academy, M. Viteazul Ave, No. 24, 300223-Timisoara, Romania
  2. "Politehnica" University, T. Lalescu Street, No. 2, 300223-Timisoara, Romania
  3. Research and Development National Institute for Isotopic and Molecular Technology, Cluj-Napoca 5, C.P. 700, R-3400, Romania

Abstract

A new inorganic-organic hybrid material consisting in porphyrin, namely: 5,10,15,20-tetrakis(4-hydroxyphenyl)-21H,23Hporphine, encapsulated in silica matrix is obtained. A few preliminary tests, which have been done in order to optimize the immobilization process, using different sol-gel techniques: in situ, by impregnation and by sonication, are presented. Porphyrin molecules are introduced into silica gels without major changes regarding their photoactivity, but with a side reaction due to porphyrin aggregation, and significant hyperchromic effects regarding Q bands. The compositions were characterized by using spectroscopic methods such as FT-IR and UV-vis.

Keywords

Inorganic-organic hybrid material, Porphyrin, Silica matrix, Sol-gel process, FT-IR, UV-vis.

Citation

E. FAGADAR-COSMA, C. SAVII, C. ENACHE, C. IONESCU, R. RADU, GH. FAGADAR-COSMA, S. FARCAS, Advanced silica-matrix material entrapping a hydroxysubstituted porphyrin compound. Synthesis and characterization, Optoelectronics and Advanced Materials - Rapid Communications, 1, 3, March 2007, pp.133-136 (2007).

Submitted at: Jan. 23, 2007

Accepted at: Feb. 14, 2007