TY - JOUR
T1 - Diradical Organic One-Dimensional Polymers Synthesized on a Metallic Surface
AU - Sánchez-Grande, Ana
AU - Urgel, José I.
AU - Cahlík, Aleš
AU - Santos, José
AU - Edalatmanesh, Shayan
AU - Rodríguez-Sánchez, Eider
AU - Lauwaet, Koen
AU - Mutombo, Pingo
AU - Nachtigallová, Dana
AU - Nieman, Reed
AU - Lischka, Hans
AU - de la Torre, Bruno
AU - Miranda, Rodolfo
AU - Gröning, Oliver
AU - Martín, Nazario
AU - Jelínek, Pavel
AU - Écija, David
N1 - Publisher Copyright:
© 2020 The Authors. Published by Wiley-VCH GmbH
PY - 2020/9/28
Y1 - 2020/9/28
N2 - We report on the synthesis and characterization of atomically precise one-dimensional diradical peripentacene polymers on a Au(111) surface. By means of high-resolution scanning probe microscopy complemented by theoretical simulations, we provide evidence of their magnetic properties, which arise from the presence of two unpaired spins at their termini. Additionally, we probe a transition of their magnetic properties related to the length of the polymer. Peripentacene dimers exhibit an antiferromagnetic (S=0) singlet ground state. They are characterized by singlet–triplet spin-flip inelastic excitations with an effective exchange coupling (Jeff) of 2.5 meV, whereas trimers and longer peripentacene polymers reveal a paramagnetic nature and feature Kondo fingerprints at each terminus due to the unpaired spin. Our work provides access to the precise fabrication of polymers featuring diradical character which are potentially useful in carbon-based optoelectronics and spintronics.
AB - We report on the synthesis and characterization of atomically precise one-dimensional diradical peripentacene polymers on a Au(111) surface. By means of high-resolution scanning probe microscopy complemented by theoretical simulations, we provide evidence of their magnetic properties, which arise from the presence of two unpaired spins at their termini. Additionally, we probe a transition of their magnetic properties related to the length of the polymer. Peripentacene dimers exhibit an antiferromagnetic (S=0) singlet ground state. They are characterized by singlet–triplet spin-flip inelastic excitations with an effective exchange coupling (Jeff) of 2.5 meV, whereas trimers and longer peripentacene polymers reveal a paramagnetic nature and feature Kondo fingerprints at each terminus due to the unpaired spin. Our work provides access to the precise fabrication of polymers featuring diradical character which are potentially useful in carbon-based optoelectronics and spintronics.
KW - cumulenes
KW - diradical polymers
KW - nc-AFM
KW - scanning tunneling microscopy
KW - surface chemistry
UR - http://www.scopus.com/inward/record.url?scp=85089175072&partnerID=8YFLogxK
U2 - 10.1002/anie.202006276
DO - 10.1002/anie.202006276
M3 - Article
C2 - 32592432
AN - SCOPUS:85089175072
SN - 1433-7851
VL - 59
SP - 17594
EP - 17599
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 40
ER -