کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1308926 | 975188 | 2011 | 6 صفحه PDF | دانلود رایگان |
The metal derivatives (CoII, NiII, CuII, ZnII and SnIV) of hexaporphyrinato cyclotriphosphazene systems were prepared by treating the hexaporphyrin assembly on cyclotriphosphazene ring with the appropriate metal salt under standard metallation conditions. The complete metallation of all six porphyrin units in hexaporphyrin assembly required 10–12 h reflux as judged by the absorption spectroscopy. The metal derivatives were confirmed by molecular ion peak in mass spectra for all compounds. 31P and 1H NMR spectra for Ni(II), Zn(II) and Sn(IV) derivatives and ESR spectra for Cu(II) derivative also confirmed the complete metallation of all six porphyrin units. The hexametalloporphyrin assemblies are freely soluble in common organic solvents. The spectral, electrochemical and fluorescence studies indicate that the six porphyrin units in assemblies interact very weakly and retain their individual characteristic features in the ground and excited states.
Synthesis of cyclotriphosphazene ring appended with six metalloporphyrins and their spectral and electrochemical properties are described.Figure optionsDownload as PowerPoint slideHighlights
► Five different metal derivatives of hexaporphyrinato cyclotriphosphazene ring were synthesized.
► The absorption studies indicated three fold intensity enhancement compared to monomers.
► The studies indicated minimum interaction among the metalloporphyrin units in assemblies.
Journal: Inorganica Chimica Acta - Volume 372, Issue 1, 15 June 2011, Pages 436–441