Open‐Pore Organic Material for Retaining Radioactive I 2 and CH 3 I
Abstract 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 p...
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Published in | Advanced functional materials Vol. 16; no. 2; pp. 268 - 272 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
19.01.2006
|
Online Access | Get full text |
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Summary: | Abstract
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. |
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ISSN: | 1616-301X 1616-3028 |
DOI: | 10.1002/adfm.200500245 |