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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

The role of H-bond in the high-pressure chemistry of model molecules

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Autor(es):
Fanetti, Samuele [1, 2] ; Citroni, Margherita [1, 2] ; Dziubek, Kamil [1] ; Nobrega, Marcelo Medre [3, 1] ; Bini, Roberto [1, 2, 4]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] European Lab Nonlinear Spect, LENS, Via N Carrara 1, I-50019 Florence - Italy
[2] Univ Firenze, Dipartimento Chim Ugo Schiff, Via Lastruccia 3, I-50019 Florence - Italy
[3] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, BR-05513970 Sao Paulo, SP - Brazil
[4] Natl Res Council Italy, Inst Chem OrganoMetall Cpds, ICCOM CNR, Via Madonna del Piano 10, I-50019 Florence - Italy
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF PHYSICS-CONDENSED MATTER; v. 30, n. 9 MAR 7 2018.
Citações Web of Science: 12
Resumo

Pressure is an extraordinary tool to modify direction and strength of intermolecular interactions with important consequences on the chemical stability of molecular materials. The decrease of the distance among nearest neighbour molecules can give rise to reactive configurations reflecting the crystal arrangement and leading to association processes. In this context, the role of the H-bonds is very peculiar because their usual strengthening with rising pressure does not necessarily configure a decrease of the reaction activation energy but, on the contrary, can give rise to an anomalous stability of the system. In spite of this central role, the mechanisms by which a chemical reaction is favoured or prevented by H-bonding under high pressure conditions is a poorly explored field. Here we review a few studies where the chemical behaviour of simple molecular systems under static compression was related to the H-bonding evolution with pressure. These results are able to clarify a wealth of changes of the chemical and physical properties caused by the strengthening with pressure of the H-bonding network and provide additional tools to understand the mechanisms of high-pressure reactivity, a mandatory step to make these synthetic methods of potential interest for applicative purposes. (AU)

Processo FAPESP: 15/09763-2 - Síntese e reatividade de anilina e compósitos de polianilina-ouro em alta pressão
Beneficiário:Marcelo Medre Nobrega
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
Processo FAPESP: 12/13119-3 - Espectroscopia vibracional em fases condensadas
Beneficiário:Mauro Carlos Costa Ribeiro
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 14/15107-8 - Espectroscopia Raman em alta pressão, de aminas aromáticas a polímeros condutores.
Beneficiário:Marcelo Medre Nobrega
Linha de fomento: Bolsas no Brasil - Pós-Doutorado