Spectrophotometry articles within Nature Chemistry

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• News & Views | 31 October 2023

  An open-shell molecule that exhibits conformational dynamics

  Open-shell organic molecules with properties that can be modulated by external stimuli are of interest for spintronics applications. Now, an overcrowded alkene with open-shell tetraradical character has been synthesized in which the interaction between the π-conjugated subunits depends on the charge and spin state.

  • Yoshito Tobe

• Article
  02 October 2023 | Open Access

  Tetrafluorenofulvalene as a sterically frustrated open-shell alkene

  Tetrafluorenofulvalene (TFF) defies conventional rules of bond strength in organic chemistry. In particular, the central alkene bond of TFF becomes stronger in the quintet state and in the tetraanion. These changes arise from the unusual interplay between the twist, aromaticity and spin pairing in the π-electron system of TFF.

  • Bibek Prajapati
  • , Madan D. Ambhore
  •  & Marcin Stępień

• News & Views | 21 February 2017

  Resonance is the key for coherence

  The process of electronic energy transfer between molecules has long fascinated chemists. Femtosecond spectroscopy measurements of a series of molecular dimers now reveal signals that arise from non-Born–Oppenheimer coupling, suggesting a new mechanism to enhance energy transfer.

  • Daniel B. Turner

• Article | 21 February 2017

  Controlling quantum-beating signals in 2D electronic spectra by packing synthetic heterodimers on single-walled carbon nanotubes

  Synthetic heterodimers provide a platform to demonstrate molecular design principles of vibronic coupling. Now, it has been shown that quantum beating caused by vibronic coupling can be controlled by packing a structurally flexible heterodimer on single-walled carbon nanotubes. This quantum beating requires a vibration to be resonant with the energy gap between excited states and structural rigidity.

  • Lili Wang
  • , Graham B. Griffin
  •  & Gregory S. Engel

• Article | 15 August 2016

  Enabling singlet fission by controlling intramolecular charge transfer in π-stacked covalent terrylenediimide dimers

  Singlet fission in assemblies of molecular chromophores offers a promising route to improving solar cell efficiencies, but its mechanism is not fully understood. Now, a series of covalently bound π-stacked terrylenediimide dimers have been studied to elucidate the role of interchromophore charge-transfer states in the mechanism of singlet fission.

  • Eric A. Margulies
  • , Claire E. Miller
  •  & Michael R. Wasielewski