Zigzag-Edged Polycyclic Aromatic Hydrocarbons from Benzo[m]tetraphene Precursors.
Bo YangYanwei GuGiuseppe M PaternòJoan TeyssandierAli MaghsoumiAlex J BarkerKunal S MaliFrancesco ScotognellaSteven De FeyterMatteo TommasiniXinliang FengAkimitsu NaritaKlaus MüllenPublished in: Chemistry (Weinheim an der Bergstrasse, Germany) (2023)
A series of zigzag-edged polycyclic aromatic hydrocarbons (PAHs) (Z1-Z3) were synthesized from 2,12-dibromo-7,14-diphenyl-benzo[m]tetraphene (9) as a versatile building block. Their structures were unambiguously confirmed by laser desorption/ionization time-of-flight mass spectrometry, 1 H NMR, Raman, and Fourier-transformed infrared (FTIR) spectroscopies as well as scanning tunneling microscopy. The fingerprint vibrational modes were elucidated with theoretical support. The edge- and size-dependent optical properties were characterized by UV-Vis absorption and fluorescence spectroscopy and DFT calculations. Moreover, ultrafast transient absorption spectroscopy revealed distinct modulation of the photophysical properties upon π-extension from Z1 to Z2, the latter having a gulf edge.
Keyphrases
- polycyclic aromatic hydrocarbons
- high resolution
- density functional theory
- single molecule
- energy transfer
- molecular dynamics
- molecular dynamics simulations
- mass spectrometry
- solid state
- high speed
- molecular docking
- single cell
- magnetic resonance
- cerebral ischemia
- quality control
- climate change
- risk assessment
- monte carlo
- drinking water
- subarachnoid hemorrhage
- brain injury