On-Surface Synthesis and Characterization of Triply Fused Porphyrin-Graphene Nanoribbon Hybrids.
Luis M MateoQiang SunShi-Xia LiuJesse J BergkampKristjan EimreCarlo A PignedoliPascal RuffieuxSilvio DecurtinsGiovanni BottariRoman FaselTomás TorresPublished in: Angewandte Chemie (International ed. in English) (2019)
On-surface synthesis offers a versatile approach to prepare novel carbon-based nanostructures that cannot be obtained by conventional solution chemistry. Graphene nanoribbons (GNRs) have potential for a variety of applications. A key issue for their application in molecular electronics is in the fine-tuning of their electronic properties through structural modifications, such as heteroatom doping or the incorporation of non-benzenoid rings. In this context, the covalent fusion of GNRs and porphyrins (Pors) is a highly appealing strategy. Herein we present the selective on-surface synthesis of a Por-GNR hybrid, which consists of two Pors connected by a short GNR segment. The atomically precise structure of the Por-GNR hybrid has been characterized by bond-resolved scanning tunneling microscopy (STM) and noncontact atomic force microscopy (nc-AFM). The electronic properties have been investigated by scanning tunneling spectroscopy (STS), in combination with DFT calculations, which reveals a low electronic gap of 0.4 eV.
Keyphrases
- atomic force microscopy
- single molecule
- high speed
- high resolution
- density functional theory
- electron microscopy
- photodynamic therapy
- molecular dynamics simulations
- molecular dynamics
- optical coherence tomography
- carbon nanotubes
- risk assessment
- solid state
- human health
- quantum dots
- transition metal
- label free
- electron transfer