In this study, we present the phase diagram of Fe(CO)5, consisting of three molecular polymorphs (phase I, II and III) and an extended polymeric phase that can be recovered at ambient condition. The phase diagram indicates a limited stability of Fe(CO)5 within a pressure-temperature dome formed below the liquid- phase II- polymer triple point at 4.2 GPa and 580 K. The limited stability, in turn, signifies the temperature-induced weakening of Fe-CO back bonds, which eventually leads to the dissociation of Fe-CO at the onset of the polymerization of CO. The recovered polymer is a composite of novel nm-lamellar layers of crystalline hematite Fe2O3 and amorphous carbon-oxygen polymers. These results, therefore, demonstrate the synthesis of carbon-oxygen polymer by compressing Fe(CO)5, which advocates a novel synthetic route to develop atomistic composite materials by compressing organometallic compounds.
Ryu, Young Jay, et al. "Phase diagram and transformations of iron pentacarbonyl to nm layered hematite and carbon-oxygen polymer under pressure." Scientific Reports, vol. 5, Oct. 2015. https://doi.org/10.1038/srep15139
Ryu, Young Jay, Kim, Minseob, & Yoo, Choong -Shik (2015). Phase diagram and transformations of iron pentacarbonyl to nm layered hematite and carbon-oxygen polymer under pressure. Scientific Reports, 5. https://doi.org/10.1038/srep15139
Ryu, Young Jay, Kim, Minseob, and Yoo, Choong -Shik, "Phase diagram and transformations of iron pentacarbonyl to nm layered hematite and carbon-oxygen polymer under pressure," Scientific Reports 5 (2015), https://doi.org/10.1038/srep15139
@article{osti_1239295,
author = {Ryu, Young Jay and Kim, Minseob and Yoo, Choong -Shik},
title = {Phase diagram and transformations of iron pentacarbonyl to nm layered hematite and carbon-oxygen polymer under pressure},
annote = {In this study, we present the phase diagram of Fe(CO)5, consisting of three molecular polymorphs (phase I, II and III) and an extended polymeric phase that can be recovered at ambient condition. The phase diagram indicates a limited stability of Fe(CO)5 within a pressure-temperature dome formed below the liquid- phase II- polymer triple point at 4.2 GPa and 580 K. The limited stability, in turn, signifies the temperature-induced weakening of Fe-CO back bonds, which eventually leads to the dissociation of Fe-CO at the onset of the polymerization of CO. The recovered polymer is a composite of novel nm-lamellar layers of crystalline hematite Fe2O3 and amorphous carbon-oxygen polymers. These results, therefore, demonstrate the synthesis of carbon-oxygen polymer by compressing Fe(CO)5, which advocates a novel synthetic route to develop atomistic composite materials by compressing organometallic compounds.},
doi = {10.1038/srep15139},
url = {https://www.osti.gov/biblio/1239295},
journal = {Scientific Reports},
issn = {ISSN 2045-2322},
volume = {5},
place = {United States},
publisher = {Nature Publishing Group},
year = {2015},
month = {10}}
Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, Vol. 362, Issue 1824https://doi.org/10.1098/rsta.2004.1454