High-pressure structure and reactivity of Phosphorus allotropes
| Autor: | D. Scelta, M. Ceppatelli, A. Baldassarre, K. Dziubek, R. Bini, M. Peruzzini |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Phosphorene and 2D companions, Aula Marconi, CNR, Piazza Aldo Moro 7, Rome, Italy, 08/05/2017 info:cnr-pdr/source/autori:D. Scelta, M. Ceppatelli, A. Baldassarre, K. Dziubek, R. Bini and M. Peruzzini/congresso_nome:Phosphorene and 2D companions/congresso_luogo:Aula Marconi, CNR, Piazza Aldo Moro 7, Rome, Italy/congresso_data:08%2F05%2F2017/anno:2017/pagina_da:/pagina_a:/intervallo_pagine |
| Popis: | Pressure is extremely effective in reducing the molar volume of molecular samples, thus decreasing the intermolecular distances and forcing the intermolecular interactions. Combining high-density conditions, generated by pressure, with temperature and electronic photo-excitation, unexpected products can be obtained in absence of solvents and catalysts [1]. High-pressure (HP) studies of the structural and reactive behaviour of crystalline layered black Phosphorus (bP), made by the stacking of Phosphorene layers, could open new perspectives on both the possibility of pressure induced insertion of small systems between the 2D layers (as recently demonstrated in other nanostructured systems with comparable nanosized cavities [2,3]) and on the HP functionalization of the single Phosphorene layers. Following our experience with water [4] and alcohols [5], we have thus compared the HP, photo-induced reactivity of layered bP and amorphous red Phosphorus (rP) in the presence of NH3, to study the formation of new P-N functionalities. We have also related the different reactivity of bP and rP to their structural features. In the perspective of HP inclusion of simple systems between the layers, we have studied the structural behaviour of bP in the presence of small atoms and molecules (He, H2, N2, CO) and larger, non-penetrating silicon oil. We obtained unprecedented quality Equations of State (EOS) for bP and intriguing informations regarding the actual mechanism of the room T phase transition between rhombohedral (A7) and simple cubic (sc) bP at about 11 GPa. |
| Databáze: | OpenAIRE |
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