Study of metalloenzymes through electrochemistry coupled to vibrational spectroscopy
| Full text | |
| Author(s): |
dos Santos, Alisson Ceccatto
[1]
;
de Campos Ferreira, Rodrigo Cezar
[1]
;
Moreno-Lopez, Juan Carlos
[2, 3]
;
Barreto, Lucas
[4]
;
Lepper, Michael
[5]
;
Landers, Richard
[1]
;
Steinrueck, Hans-Peter
[5]
;
Marbach, Hubertus
[5]
;
de Siervo, Abner
[1]
Total Authors: 9
|
| Affiliation: | [1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[2] Univ Vienna, Fac Phys, A-1090 Vienna - Austria
[3] Yachay Tech Univ, Sch Phys Sci & Nanotechnol, Urcuqui 100119 - Ecuador
[4] Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210580 Santo Andre, SP - Brazil
[5] Friedrich Alexander Univ Erlangen Nurnberg, Lehrstuhl Phys Chem 2, D-91058 Erlangen - Germany
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | CHEMISTRY OF MATERIALS; v. 32, n. 5, p. 2114-2122, MAR 10 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
Metal adatoms play a key role in surface diffusion, adsorption conformation, and self-assembly of porphyrin molecules on metal surfaces. Herein, we study the specific influence of coadsorption of Fe, Co, and Pd atoms on the behavior of 2H-tetiakis(p-cyano)phenylporphyrin (2H-TCNPP) on Cu(111) using scanning tunneling microscopy. Upon codeposition of Fe and Co, the molecules form one-dimensional (1D) linear chains after mild annealing on Cu(111) driven by the interaction of its cyano groups with metal adatoms. A similar behavior has been observed previously on Cu(111), mediated by Cu adatoms, where the functional CN groups were also found to lower the reaction rate of the so-called porphyrin self-metalation reaction with Cu atoms significantly, in comparison to the non-cyano-functionalized porphyrin. Upon co-deposition of Pd and mild annealing, we find a remarkably different behavior, that is, a massive reorganization from 1D molecular chains to a peculiar rectangular 2D (two-dimensional) network. The molecular appearance changes to a clover shape, which is attributed to a Pd-induced dehydrogenation and subsequent ring closure reaction of the phenyl and pyrrole groups. (AU) | |
| FAPESP's process: | 17/08846-7 - Determination of thermodynamic parameters in the diffusion and formation of tetra-4-chlorophenylporphyrin nanomembranes on Cu(111) |
| Grantee: | Alisson Ceccatto dos Santos |
| Support type: | Scholarships in Brazil - Scientific Initiation |
| FAPESP's process: | 07/54829-5 - Electronic and geometric structure of nano-materials: synchrotron radiation studies |
| Grantee: | Richard Landers |
| Support type: | Research Projects - Thematic Grants |