High pressure chemistry: materials under extreme conditions During the last 20 years high pressure science has experienced a dramatic growth and nowadays encompasses a huge variety of research areas, spanning from biology and food processing to chemistry and physics of matter under extremes conditions. In this presentation, after a brief introduction about the generation of static high pressure in the GPa range and the effect of pressure on molecular systems, I will present a selection of significant studies, which highlight the importance of pressure not only to explore the fundamental chemical and physical properties of matter, but also to synthesize new advanced materials and gain insight about their structural and reactive properties. I will finally focus on our recent results about the mechanism of the high pressure A7 to sc phase transition in Phosphorus and the discovery of the pseudo-simple cubic (p-sc) structure, which have remarkable implications [1]. From a chemical point of view, the observation of the p-sc structure up to about 30 GPa significantly raises the pressure limit where the layered structures of P exist and reconciles the chemical and structural high pressure behavior of P with those of heavier pnictogens, finally bringing order to the sequence of the high pressure limit of the A7 layered structure in group 15 elements of the periodic table [2]. Moreover, the identification of the effects ruling the stability of the layered vs non-layered structure of P opens new perspectives for the synthesis, stabilization and functionalization of Phosphorene-based materials. As superconductivity is concerned, the identification of the p-sc structure provides new experimental evidence to explain the long-debated anomalous pressure evolution of Tc in P below 30 GPa. [1] D. Scelta, A. Baldassarre, M. Serrano-Ruiz, K. Dziubek, A. B. Cairns, M. Peruzzini, R. Bini, M. Ceppatelli, "Interlayer Bond Formation in Black Phosphorus at High Pressure", Angew. Chem. Int. Ed. 2017, 56, 14135-14140, DOI 10.1002/anie.201708368. [2] D. Scelta, A. Baldassarre, M. Serrano-Ruiz,a K. Dziubek, A. B. Cairns, M. Peruzzini, R. Bini and M. Ceppatelli "The p-sc structure in Phosphorus: bringing order to the high pressure phases of group 15 elements" Chem. Commun. 2018 (in press).
High pressure chemistry: materials under extreme conditions
Matteo Ceppatelli
2018
Abstract
High pressure chemistry: materials under extreme conditions During the last 20 years high pressure science has experienced a dramatic growth and nowadays encompasses a huge variety of research areas, spanning from biology and food processing to chemistry and physics of matter under extremes conditions. In this presentation, after a brief introduction about the generation of static high pressure in the GPa range and the effect of pressure on molecular systems, I will present a selection of significant studies, which highlight the importance of pressure not only to explore the fundamental chemical and physical properties of matter, but also to synthesize new advanced materials and gain insight about their structural and reactive properties. I will finally focus on our recent results about the mechanism of the high pressure A7 to sc phase transition in Phosphorus and the discovery of the pseudo-simple cubic (p-sc) structure, which have remarkable implications [1]. From a chemical point of view, the observation of the p-sc structure up to about 30 GPa significantly raises the pressure limit where the layered structures of P exist and reconciles the chemical and structural high pressure behavior of P with those of heavier pnictogens, finally bringing order to the sequence of the high pressure limit of the A7 layered structure in group 15 elements of the periodic table [2]. Moreover, the identification of the effects ruling the stability of the layered vs non-layered structure of P opens new perspectives for the synthesis, stabilization and functionalization of Phosphorene-based materials. As superconductivity is concerned, the identification of the p-sc structure provides new experimental evidence to explain the long-debated anomalous pressure evolution of Tc in P below 30 GPa. [1] D. Scelta, A. Baldassarre, M. Serrano-Ruiz, K. Dziubek, A. B. Cairns, M. Peruzzini, R. Bini, M. Ceppatelli, "Interlayer Bond Formation in Black Phosphorus at High Pressure", Angew. Chem. Int. Ed. 2017, 56, 14135-14140, DOI 10.1002/anie.201708368. [2] D. Scelta, A. Baldassarre, M. Serrano-Ruiz,a K. Dziubek, A. B. Cairns, M. Peruzzini, R. Bini and M. Ceppatelli "The p-sc structure in Phosphorus: bringing order to the high pressure phases of group 15 elements" Chem. Commun. 2018 (in press).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
