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Related Concept Videos

Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
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Related Experiment Video

Updated: Jun 24, 2026

Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy
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Phase-Resolved Dual Control of Phenol Photodissociation at the Air-Water Interface From Structure-Resolved

Qiang Yin1, Jialing Shi1, Jinping Zhao2

  • 1School of Materials and Energy, Central South University of Forestry and Technology, Changsha, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|June 22, 2026
PubMed
Summary

Phenolic photodissociation is much faster at the air-water interface due to accessible dark states and better electron density accommodation. This study reveals interface-specific structural factors controlling this enhanced reactivity.

Keywords:
air–water interfaceelectron stabilizationmultiphase modelingphenolπσ*‐related photochemistry

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Last Updated: Jun 24, 2026

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Area of Science:

  • Physical Chemistry
  • Chemical Physics
  • Surface Science

Background:

  • Phenolic photodissociation is significantly faster at air-water interfaces compared to bulk water.
  • The precise structural reasons for this interfacial acceleration are not fully understood.

Purpose of the Study:

  • To elucidate the structural origins of accelerated phenolic photodissociation at the air-water interface.
  • To develop a framework for analyzing phase-dependent photodissociation dynamics.

Main Methods:

  • Developed a descriptor-level analysis framework using statistics-driven methods.
  • Identified solvent-side dark-state acceptor orbitals (σp*) and their energy distribution ε(σp*).
  • Utilized periodic slab models to accurately represent the air-water interface, avoiding limitations of truncated cluster models.

Main Results:

  • The interfacial ε(σp*) distribution is shifted lower by ~0.7 eV and broadened compared to the bulk.
  • Low-coordination and weakly constrained microenvironments correlate with lower ε(σp*).
  • Periodic slab models revealed intrinsic interface-bulk contrast masked by cluster models.

Conclusions:

  • The air-water interface promotes phenolic photodissociation by favoring both dark-state access and stabilization of transferred electron density.
  • Findings provide transferable insights for multiphase photochemical modeling.
  • Suggests strategies for controlling interfacial reactivity by manipulating microenvironment characteristics.