A spectrophotometric and thermodynamic study of the sitting-atop complex formation from reaction between free base meso-tetraarylporphyrins and zirconyl nitrate in chloroform solution

2009 ◽  
Vol 74 (2) ◽  
pp. 324-328 ◽  
Author(s):  
Hossein Dehghani ◽  
Mohammad Reza Mansournia
Keyword(s):  
Complex Formation ◽  
Chloroform Solution ◽  
Thermodynamic Study ◽  
Free Base ◽  
Zirconyl Nitrate

Thermodynamic study on supramolecular complex formation of theophylline derivates with a synthetic receptor

2003 ◽  
Vol 44 (29) ◽  
pp. 5515-5517 ◽  
Author(s):  
Jeroni Morey ◽  
Pablo Ballester ◽  
Miquel Angel Barceló ◽  
Antoni Costa ◽  
Pere M Deyà
Keyword(s):  
Complex Formation ◽  
Supramolecular Complex ◽  
Thermodynamic Study ◽  
Synthetic Receptor

Perfluorinated porphyrazines 1: Synthesis and UV-vis spectral study of perfluorinated octaphenylporphyrazine and its indium(III) complex, [MPA(F5Ph)8](M = 2H, InIII(OH))

2013 ◽  
Vol 17 (08n09) ◽  
pp. 905-912 ◽  
Author(s):  
Pavel A. Stuzhin ◽  
Maksim Yu. Goryachev ◽  
Svetlana S. Ivanova ◽  
Anna Nazarova ◽  
Igor Pimkov ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Electronic Absorption ◽  
Spectral Study ◽  
Electronic Absorption Spectra ◽  
Chloroform Solution ◽  
Free Base ◽  
Hypsochromic Shift ◽  
Trans Isomers ◽  
Cis And Trans Isomers ◽  
Cis And Trans

Novel perfluorinated porphyrazine has been prepared as indium(III) complex of octa(pentafluorophenyl)porphyrazine by cyclotetramerization of 1,2-dicyano-1,2-bis(pentafluorophenyl)-ethylene (mixture of cis- and trans-isomers) with basic indium(III) acetate in a melt. The In III complex is stable in trifluoroacetic and sulfuric acids, but is easily demetalated with formation of the free-base in a chloroform solution containing HCl or slighly acidified with CF 3 COOH in the presence of tetraalkylammonium chloride as a catalyst. Perfluorination of octaphenylporphyrazine macrocycle leads to a hypsochromic shift of the Q-band maxima in the electronic absorption spectra, to drastic decrease of the basicity of meso-nitrogen atoms of porphyrazine macrocycle and to increase of the acidity of the internal NH -groups.

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