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Related Concept Videos

π Electron Effects on Chemical Shift: Overview01:27

π Electron Effects on Chemical Shift: Overview

An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0, resulting in...
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Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F&#8722;
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Published on: July 27, 2018

Electron correlation in real time.

Giuseppe Sansone1, Thomas Pfeifer, Konstantinos Simeonidis

  • 1CNR-IFN Dipartimento di Fisica, Politecnico Milano, Milano, Italy. giuseppe.sansone@polimi.it

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
|December 14, 2011
PubMed
Summary
This summary is machine-generated.

Electron correlation, the interaction between electrons, drives matter evolution. Attosecond XUV pulses now allow real-time observation and control of these ultrafast electron dynamics.

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Area of Science:

  • Quantum mechanics
  • Atomic, molecular, and optical physics
  • Condensed matter physics

Background:

  • Electron correlation is a fundamental quantum mechanical phenomenon arising from electron-electron interactions in multielectron systems.
  • Understanding electron correlation is crucial for describing the behavior of matter across all its states, from simple atoms to complex solids.
  • Excited states of atoms and molecules, populated by high-energy radiation, undergo relaxation processes governed by electron correlation.

Purpose of the Study:

  • To explore the role of electron correlation in the dynamics of excited states.
  • To investigate relaxation mechanisms like Fano resonance, Auger decay, interatomic Coulombic decay, and charge migration.
  • To highlight the impact of attosecond extreme ultraviolet (XUV) pulses in probing and controlling these ultrafast electron dynamics.

Main Methods:

  • Theoretical approximations to describe electron correlation in multielectron systems.
  • Experimental generation of few-femtosecond and attosecond XUV pulses.
  • Development of time-resolved spectroscopy techniques with attosecond resolution.

Main Results:

  • Electron correlation dictates relaxation pathways in excited atoms and molecules, including Fano resonance and Auger decay.
  • Ultrafast processes like interatomic Coulombic decay and charge migration in molecular systems are driven by electron correlation.
  • Attosecond spectroscopy enables real-time observation of correlated electron motion and electron-nuclear interactions.

Conclusions:

  • The advent of attosecond XUV pulses provides unprecedented temporal resolution to study electron correlation dynamics.
  • Understanding electron correlation is vital for advancements in fields like biochemistry, biology, and electronic device design.
  • Controlling electron correlation dynamics opens new avenues for scientific discovery and technological innovation.