The structure directing role of 1, 3-diaminopropane in the hydrothermal synthesis of iron(III) phosphate

1,3-Diaminopropane (DAP) was used as a structure-directing agent for the hydrothermal synthesis of an organically templated iron phosphate. During crystallization at 180 ?C, iron phosphate (FePO-DAP) with a layered structure was formed after one day. Longer crystallization yielded a mixture of FePO-...

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Bibliographic Details
Published in:Journal of the Serbian Chemical Society 2004, Vol.69 (3), p.179-186
Main Authors: Rajic, Nevenka, Stojakovic, Djordje, Hanzel, Darko, Kaucic, Venceslav
Format: Article
Language:English
Subjects:
fepo
gulp
hydrothermal synthesis
iron phosphate
open-framework
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Summary:1,3-Diaminopropane (DAP) was used as a structure-directing agent for the hydrothermal synthesis of an organically templated iron phosphate. During crystallization at 180 ?C, iron phosphate (FePO-DAP) with a layered structure was formed after one day. Longer crystallization yielded a mixture of FePO-DAP and leucophosphite, raising the question whether a transformation of FePO-DAP to leucophosphite occurs, or whether DAP decomposes under hydrothermal conditions resulting in leucophosphite formation. Lattice energy and free energy calculations strongly support the supposition that a decomposition of DAP occurs prior to the formation of leucophosphite. 1,3-Diaminopropan (DAP) je upotrebljen kao strukturni agens u sintezi gvozdje-fosfata. Tokom jednodnevne kristalizacije na 180 ?C dolazi do nastajanja gvozdje-fosfata sa slojevitom strukturom (FePO-DAP). U toku produzene kristalizacije nastaje smesa FePO-DAP i leukofosfita sto otvara pitanje da li dolazi do transformacije FePO-DAP u leukofosfit, ili se DAP razlaze u uslovima hidrotermalne kristalizacije uz dalji nastanak leukofosfita. Proracun energije resetke i slobodne energije dokazuje da razgradnja DAP prethodi nastanku leukofosfita.
ISSN:0352-5139
1820-7421
DOI:10.2298/JSC0403179R