Polyfuran-based chemical sensors: reactivity analysis via Fukui indexes and reactive molecular dynamics

Author(s)

Lascane, Leonardo Gois ; Oliveira, Eliezer Fernando ; Batagin-Neto, Augusto

• Document type: Journal article
• Source: MRS ADVANCES; v. 5, n. 10, p. 7-pg., 2020-01-01.

Abstract

In the present study we employ electronic structure calculations (based on Density Functional Theory -DFT approach) and Fully Atomistic Reactive Molecular Dynamics (FARMD) simulations (based on ReaxFF reactive force field) to evaluate the reactivity of branched polyfuran (PF) derivatives and identify promising systems for chemical sensing. Condensed-to-atoms Fukui indexes (CAFI) were employed to identify the most reactive sites on the oligomers structure. The chemical sensing abilities of the most promising systems were evaluated via FARMD simulations in the presence of distinct gaseous compounds. The results indicate the derivatives PF-CCH and PF-NO & x2082; (i.e. CCH and NO2 as side groups) as the most promising systems for chemical sensor applications, presenting higher reactivity on the most accessible sites. An interesting correspondence between DFT and MD results was also identified, suggesting the plausibility of using CAFI parameters for the identification of improved materials for chemical sensors. (AU)

• FAPESP's process: 13/08293-7 - CCES - Center for Computational Engineering and Sciences
• Grantee: Munir Salomao Skaf
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 16/18499-0 - Investigation on the structural, mechanical and functional properties of carbon-based nanostructures
• Grantee: Eliezer Fernando de Oliveira
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 19/07157-9 - DESIGNING NEW 3D STRUCTURES FROM ZEOLITE TEMPLATES FOR 3D PRINTING APPLICATIONS
• Grantee: Eliezer Fernando de Oliveira
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• FAPESP's process: 16/11358-1 - Electronic structure calculations for the study of polyfuran-based chemical sensors
• Grantee: Leonardo Gois Lascane
• Support Opportunities: Scholarships in Brazil - Scientific Initiation