Closing the Nanographene Gap: Surface-Assisted Synthesis of Peripentacene from 6,6'-Bipentacene Precursors.
The thermally induced cyclodehydrogenation reaction of 6,6'-bipentacene precursors on Au(111) yields peripentacene stabilized by surface interactions with the underlying metallic substrate. STM and atomic-resolution non-contact AFM imaging reveal rectangular flakes of nanographene featuring parallel pairs of zig-zag and armchair edges resulting from the lateral fusion of two pentacene subunits. The synthesis of a novel molecular precursor 6,6'-bipentacene, itself a synthetic target of interest for optical and electronic applications, is also reported. The scalable synthetic strategy promises to afford access to a structurally diverse class of extended periacenes and related polycyclic aromatic hydrocarbons as advanced materials for electronic, spintronic, optical, and magnetic devices.
Department of Chemistry, University of California Berkeley, 699 Tan Hall, Berkeley, CA 94720 (USA).
Cameron
C
Rogers
Department of Physics, University of California Berkeley, 345 Birge Hall, Berkeley, CA 94720 (USA).
Chen
C
Chen
Department of Physics, University of California Berkeley, 345 Birge Hall, Berkeley, CA 94720 (USA).
Zahra
Z
Pedramrazi
Department of Physics, University of California Berkeley, 345 Birge Hall, Berkeley, CA 94720 (USA).
Arash A
AA
Omrani
Department of Physics, University of California Berkeley, 345 Birge Hall, Berkeley, CA 94720 (USA).
Hsin-Zon
HZ
Tsai
Department of Physics, University of California Berkeley, 345 Birge Hall, Berkeley, CA 94720 (USA).
Han Sae
HS
Jung
Department of Chemistry, University of California Berkeley, 699 Tan Hall, Berkeley, CA 94720 (USA).|Chemical Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (USA).
Song
S
Lin
Department of Physics, University of California Berkeley, 345 Birge Hall, Berkeley, CA 94720 (USA). crommie@berkeley.edu.|Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (USA). crommie@berkeley.edu.|Kavli Energy NanoSciences Institute at the University of California Berkeley and the Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (USA). crommie@berkeley.edu.
Michael F
MF
Crommie
Department of Chemistry, University of California Berkeley, 699 Tan Hall, Berkeley, CA 94720 (USA). ffischer@berkeley.edu.|Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (USA). ffischer@berkeley.edu.|Kavli Energy NanoSciences Institute at the University of California Berkeley and the Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (USA). ffischer@berkeley.edu.
Felix R
FR
Fischer
arenes; graphene; non-contact AFM; periacene; surface chemistry