DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Controlled catalyst-transfer polymerization in graphene nanoribbon synthesis

Journal Article · · Chem
 [1];  [1];  [1];  [1]; ORCiD logo [2]
  1. University of California, Berkeley, CA (United States)
  2. University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Kavli Energy NanoScience Institute, Berkeley, CA (United States)

Exercising direct control over the unusual electronic structures arising from quantum confinement effects in graphene nanoribbons (GNRs) is intimately linked to geometric boundary conditions imposed by the structure of the ribbon. Besides composition and position of substitutional dopant atoms, the symmetry of the unit cell, width, length, and termination of a GNR govern its electronic structure. Here, we present a rational design that integrates each of these interdependent variables within a modular bottom-up synthesis. Our hybrid chemical approach relies on a catalyst-transfer polymerization that establishes excellent control over length, width, and end groups. Complemented by a surface-assisted cyclodehydrogenation step, uniquely enabled by matrix-assisted direct (MAD) transfer protocols, geometry and functional handles encoded in a polymer template are faithfully mapped onto the structure of the corresponding GNR. Bond-resolved scanning tunneling microscopy (BRSTM) and spectroscopy (STS) validate the robust correlation between polymer template design and GNR electronic structure.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231; SC0023105; KC1203; AC02-05-CH11231
OSTI ID:
2228768
Alternate ID(s):
OSTI ID: 2433795
Journal Information:
Chem, Vol. 10, Issue 2; ISSN 2451-9294
Publisher:
Cell PressCopyright Statement
Country of Publication:
United States
Language:
English

References (36)

Controlled Pd(0)/ t -Bu 3 P-Catalyzed Suzuki Cross-Coupling Polymerization of AB-Type Monomers with PhPd( t -Bu 3 P)I or Pd 2 (dba) 3 / t -Bu 3 P/ArI as the Initiator journal August 2012
Efficient Bottom-Up Preparation of Graphene Nanoribbons by Mild Suzuki-Miyaura Polymerization of Simple Triaryl Monomers journal May 2016
Bottom-Up Synthesis of Necklace-Like Graphene Nanoribbons journal July 2015
Chain-Growth Suzuki Polymerization of n-Type Fluorene Copolymers journal November 2011
Synthesis of structurally well-defined and liquid-phase-processable graphene nanoribbons journal December 2013
Ultra-Narrow Low-Bandgap Graphene Nanoribbons from Bromoperylenes-Synthesis and Terahertz-Spectroscopy journal March 2017
On-surface synthesis of graphene nanoribbons with zigzag edge topology journal March 2016
Two-Dimensional Graphene Nanoribbons journal April 2008
Programmable Fabrication of Monodisperse Graphene Nanoribbons via Deterministic Iterative Synthesis journal August 2022
Chain-Growth Polymerization for the Synthesis of Polyfluorene via Suzuki−Miyaura Coupling Reaction from an Externally Added Initiator Unit journal June 2007
Controlled Pd(0)/Ad3P-Catalyzed Suzuki Cross-Coupling Polymerization of AB-Type Monomers with Ad3P-Coordinated Acetanilide-Based Palladacycle Complex as Initiator journal November 2017
Bottom-Up Synthesis of Liquid-Phase-Processable Graphene Nanoribbons with Near-Infrared Absorption journal October 2014
Reticular Growth of Graphene Nanoribbon 2D Covalent Organic Frameworks journal May 2020
Automated Tip Conditioning for Scanning Tunneling Spectroscopy journal February 2021
Comparison of Oxidative Aromatic Coupling and the Scholl Reaction journal July 2013
Chain-Growth Condensation Polymerization for the Synthesis of Well-Defined Condensation Polymers and π-Conjugated Polymers journal September 2009
Accessing conjugated polymers with precisely controlled heterobisfunctional chain ends via post-polymerization modification of the OTf group and controlled Pd(0)/t-Bu 3 P-catalyzed Suzuki cross-coupling polymerization journal January 2015
Atomically precise bottom-up fabrication of graphene nanoribbons journal July 2010
Modulating the Rate of Controlled Suzuki–Miyaura Catalyst-Transfer Polymerization by Boronate Tuning journal April 2022
The Scholl Reaction as a Powerful Tool for Synthesis of Curved Polycyclic Aromatics journal August 2022
Living Suzuki–Miyaura Catalyst-Transfer Polymerization for Precision Synthesis of Length-Controlled Armchair Graphene Nanoribbons and Their Block Copolymers journal June 2023
Synthesis and Photophysics of Fully π-Conjugated Heterobis-Functionalized Polymeric Molecular Wires via Suzuki Chain-Growth Polymerization journal October 2012
Precision Synthesis of Various Low‐Bandgap Donor–Acceptor Alternating Conjugated Polymers via Living Suzuki–Miyaura Catalyst‐Transfer Polymerization journal June 2022
Structurally Defined Graphene Nanoribbons with High Lateral Extension journal October 2012
Surface-Synthesized Graphene Nanoribbons for Room Temperature Switching Devices: Substrate Transfer and ex Situ Characterization journal March 2019
A modular synthetic approach for band-gap engineering of armchair graphene nanoribbons journal April 2018
Synergetic Bottom-Up Synthesis of Graphene Nanoribbons by Matrix-Assisted Direct Transfer journal March 2021
Width-Dependent Band Gap in Armchair Graphene Nanoribbons Reveals Fermi Level Pinning on Au(111) journal October 2017
On-Surface Synthesis and Characterization of 9-Atom Wide Armchair Graphene Nanoribbons journal February 2017
From Branched Polyphenylenes to Graphite Ribbons journal August 2003
Universal Suzuki–Miyaura Catalyst-Transfer Polymerization for Precision Synthesis of Strong Donor/Acceptor-Based Conjugated Polymers and Their Sequence Engineering journal July 2021
Controlled Pd(0)/ t -Bu 3 P-Catalyzed Suzuki Cross-Coupling Polymerization of AB-Type Monomers with ArPd( t -Bu 3 P)X or Pd 2 (dba) 3 / t -Bu 3 P/ArX as the Initiator journal January 2015
Rationally Designed Topological Quantum Dots in Bottom-Up Graphene Nanoribbons journal November 2021
Topological band engineering of graphene nanoribbons journal August 2018
Engineering of robust topological quantum phases in graphene nanoribbons journal August 2018
A Rational Design of Highly Controlled Suzuki–Miyaura Catalyst-Transfer Polycondensation for Precision Synthesis of Polythiophenes and Their Block Copolymers: Marriage of Palladacycle Precatalysts with MIDA-Boronates journal March 2018