Guido Fratesi (Avtor), Daniele Paoloni (Avtor), Luca Persichetti (Avtor), Luca Camilli (Avtor), Antonio Caporale (Avtor), Anu Baby (Avtor), Dean Cvetko (Avtor), Gregor Kladnik (Avtor), Alberto Morgante (Avtor), Alessandro Ruocco (Avtor)

Povzetek

Metal-phthalocyanines (MPcs) are a class of organic macrocycles that have received much attention for their potential use in various applications, including molecular electronics. In recent years, the on-surface synthesis of different MPcs has been demonstrated via deposition of atomic species, sample heating and scanning tunneling microscopy (STM) manipulation. However, the spontaneous substitution of the central metal atom with a substrate one, known as transmetalation, remains a less explored process. Here, we study the transmetalation of ZnPc on Al(100) using a combination of STM and density functional theory (DFT) computations. Previously published X-ray photoelectron spectroscopy (XPS) data indicate the absence of Zn atoms from the interface, while our STM images show that a central atom is still present. This suggests that the transmetalation process occurs spontaneously for all ZnPc molecules. Our DFT calculations reveal that the transmetalation of Zn with Al releases 2 eV per molecule, providing thermodynamic evidence for the process. The on-surface synthesized aluminium phthalocyanine (AlPc) molecules are stabilised by the formation of a bond between the central metal atom and the substrate, similar to that found in chloroaluminium phthalocyanine (ClAlPc), with the consequent suppresion of the paramagnetism of free AlPc.

Ključne besede

površinska kemija;transmetalacija;ftalocianini;magnetne lastnosti;elektronske lastnosti;vrstična tunelska mikroskopija;surface chemistry;transmetalation;phthalocyanine;electronic properties;magnetic properties;scanning tunneling microscopy;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FMF - Fakulteta za matematiko in fiziko
UDK: 544
COBISS: 223164163 Povezava se bo odprla v novem oknu
ISSN: 0020-1693
Št. ogledov: 35
Št. prenosov: 42
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: površinska kemija;transmetalacija;ftalocianini;magnetne lastnosti;elektronske lastnosti;vrstična tunelska mikroskopija;
Vrsta dela (COBISS): Članek v reviji
Strani: 7 str.
Letnik: ǂVol. ǂ559
Zvezek: ǂart. no. ǂ121790
Čas izdaje: Jan. 2024
DOI: 10.1016/j.ica.2023.121790
ID: 25746647