Determination of thermodynamic parameters in the diffusion and formation of tetra-4-chlorophenylporphyrin nanomembranes on Cu(111)

• Grant number: 17/08846-7
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: August 01, 2017
• End date: July 31, 2018
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Abner de Siervo
• Grantee: Alisson Ceccatto dos Santos
• Host Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil

Abstract

Macromolecules of the porphyrin family are well studied because they are important compounds present in nature, such as hemoglobin, vitamin B12 and chlorophyll. From the point of view of applications, porphyrin-based compounds are used in medicines and dietary supplements, pigments, organic LEDs, and even organic solar cells. More recently, the scientific community has expended many efforts to explore ordered molecular nanostructures formed by these compounds. The molecule (5,10,15,20- (tetra-4-chlorophenyl) porphyrin) or 2H-TClPP can be used as the fundamental block for the formation of 2D molecular nanomembranes via Ullmann reaction. One of the most important information in the process is the diffusion barrier of the precursor in the chosen catalyst substrate. In this study we will investigate the diffusion, rotational and coordinate barrier energies of 2H-TClPP on Cu (111) by means temperature dependent electron tunneling microscopy (STM) measurements and a comprehensive Arrhenius approach. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

MORENO-LOPEZ, JUAN CARLOS; JOHN MOWBRAY, DUNCAN; PEREZ PAZ, ALEJANDRO; DE CAMPOS FERREIRA, RODRIGO CEZAR; DOS SANTOS, ALISSON CECCATTO; AYALA, PAOLA; DE SIERVO, ABNER. Roles of Precursor Conformation and Adatoms in Ullmann Coupling: An Inverted Porphyrin on Cu(111). CHEMISTRY OF MATERIALS, v. 31, n. 8, p. 3009-3017, APR 23 2019. (17/08846-7, 07/54829-5)

DOS SANTOS, ALISSON CECCATTO; DE CAMPOS FERREIRA, RODRIGO CEZAR; MORENO-LOPEZ, JUAN CARLOS; BARRETO, LUCAS; LEPPER, MICHAEL; LANDERS, RICHARD; STEINRUECK, HANS-PETER; MARBACH, HUBERTUS; DE SIERVO, ABNER. Cyano-Functionalized Porphyrins on Cu(111) from One-Dimensional Wires to Two-Dimensional Molecular Frameworks: On the Role of Co-Deposited Metal Atoms. CHEMISTRY OF MATERIALS, v. 32, n. 5, p. 2114-2122, MAR 10 2020. (17/08846-7, 07/54829-5)