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Open‐Pore Organic Material for Retaining Radioactive I 2 and CH 3 I
Author(s) -
Hertzsch T.,
Gervais C.,
Hulliger J.,
Jaeckel B.,
Guentay S.,
Bruchertseifer H.,
Neels A.
Publication year - 2006
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200500245
Subject(s) - sorption , materials science , thermal stability , pyrazine , chemical engineering , microporous material , porosity , adsorption , organic chemistry , composite material , chemistry , engineering
Application of ultrasound and ball milling produces micrometer‐sized crystallites of tris‐( o ‐phenylenedioxy)‐cyclotriphosphazene (TPP) that show zeolite‐like reversible sorption of I 2 and CH 3 I (methyl iodide). The thermal stability of open‐pore TPP is improved by partial loading with pyrazine. The sorption properties of open‐pore TPP are investigated by the 131 I radioactive tracer method. Comparison with activated charcoal (ACC) shows that TPP has a higher sorption efficiency for I 2 dissolved in water than ACC. In the case of a humid gaseous source of CH 3 I also, TPP exhibits better sorption properties than ACC. Partial loading of open‐pore TPP by pyrazine increases its thermal stability by 50 °C and the binding properties for retaining CH 3 I are also improved. Force‐field calculations show a difference of Δ E ≈ 20 kJ mol –1 , making the open‐pore system less stable than the apohost.