Synthesis and characterization of peri-heptacene on a metallic surface

Kód výsledku v IS VaVaI

RIV/68378271:_____/22:00560757 - isvavai.cz

Nalezeny alternativní kódy

RIV/61989592:15640/22:73618771

Výsledek na webu

https://doi.org/10.1002/anie.202114983

DOI - Digital Object Identifier

10.1002/anie.202114983

Jazyk výsledku

angličtina

Název v původním jazyce

Synthesis and characterization of peri-heptacene on a metallic surface

Popis výsledku v původním jazyce

The synthesis of long n-peri-acenes (n-PAs) is challenging as a result of their inherent open-shell radical character, which arises from the presence of parallel zigzag edges beyond a certain n value. They are considered as π-electron model systems to study magnetism in graphene nanostructures, being potential candidates in the fabrication of optoelectronic and spintronic devices. Here, we report the on-surface formation of the largest pristine member of the n-PA family, i.e. peri-heptacene (n=7, 7-PA), obtained on an Au(111) substrate under ultra-high vacuum conditions. Our high-resolution scanning tunneling microscopy investigations, complemented by theoretical simulations, provide insight into the chemical structure of this previously elusive compound. In addition, scanning tunneling spectroscopy reveals the antiferromagnetic open-shell singlet ground state of 7-PA, exhibiting singlet–triplet spin-flip inelastic excitations with an effective exchange coupling (Jeff) of 49 meV.n

Název v anglickém jazyce

Synthesis and characterization of peri-heptacene on a metallic surface

Popis výsledku anglicky

The synthesis of long n-peri-acenes (n-PAs) is challenging as a result of their inherent open-shell radical character, which arises from the presence of parallel zigzag edges beyond a certain n value. They are considered as π-electron model systems to study magnetism in graphene nanostructures, being potential candidates in the fabrication of optoelectronic and spintronic devices. Here, we report the on-surface formation of the largest pristine member of the n-PA family, i.e. peri-heptacene (n=7, 7-PA), obtained on an Au(111) substrate under ultra-high vacuum conditions. Our high-resolution scanning tunneling microscopy investigations, complemented by theoretical simulations, provide insight into the chemical structure of this previously elusive compound. In addition, scanning tunneling spectroscopy reveals the antiferromagnetic open-shell singlet ground state of 7-PA, exhibiting singlet–triplet spin-flip inelastic excitations with an effective exchange coupling (Jeff) of 49 meV.n

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

GX20-13692X: 1D molekulární řetízky na površích

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Angewandte Chemie - International Edition

ISSN

1433-7851

e-ISSN

1521-3773

Svazek periodika

61

Číslo periodika v rámci svazku

23

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

5

Strana od-do

e202114983

Kód UT WoS článku

000788357500001

EID výsledku v databázi Scopus

2-s2.0-85128921096