Real-space imaging of molecular structure and chemical bonding by single-molecule inelastic tunneling probe

Science ◽  
2014 ◽  
Vol 344 (6186) ◽  
pp. 885-888 ◽  
Author(s):  
C.-l. Chiang ◽  
C. Xu ◽  
Z. Han ◽  
W. Ho
Keyword(s):  
Molecular Structure ◽  
Single Molecule ◽  
Chemical Bonding ◽  
Real Space ◽  
Inelastic Tunneling

scholarly journals Probing intramolecular vibronic coupling through vibronic-state imaging

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Fan-Fang Kong ◽  
Xiao-Jun Tian ◽  
Yang Zhang ◽  
Yun-Jie Yu ◽  
Shi-Hao Jing ◽  
...  
Keyword(s):  
Single Molecule ◽  
Molecular Spectroscopy ◽  
Transition Density ◽  
Real Space ◽  
Vibronic Coupling ◽  
Vibronic State ◽  
Dipole Orientation ◽  
Transition Dipole ◽  
Franck Condon ◽  
Strong Dynamic

AbstractVibronic coupling is a central issue in molecular spectroscopy. Here we investigate vibronic coupling within a single pentacene molecule in real space by imaging the spatial distribution of single-molecule electroluminescence via highly localized excitation of tunneling electrons in a controlled plasmonic junction. The observed two-spot orientation for certain vibronic-state imaging is found to be evidently different from the purely electronic 0–0 transition, rotated by 90°, which reflects the change in the transition dipole orientation from along the molecular short axis to the long axis. Such a change reveals the occurrence of strong vibronic coupling associated with a large Herzberg–Teller contribution, going beyond the conventional Franck–Condon picture. The emergence of large vibration-induced transition charges oscillating along the long axis is found to originate from the strong dynamic perturbation of the anti-symmetric vibration on those carbon atoms with large transition density populations during electronic transitions.

CO Adsorption on GaPd-Unravelling the Chemical Bonding in Real Space

ChemPhysChem ◽  
2017 ◽  
Vol 18 (4) ◽  
pp. 334-337 ◽  
Author(s):  
Sebastián Alarcón Villaseca ◽  
Alim Ormeci ◽  
Sergey V. Levchenko ◽  
Robert Schlögl ◽  
Yuri Grin ◽  
...  
Keyword(s):  
Chemical Bonding ◽  
Co Adsorption ◽  
Real Space

Chemical Bonding and Molecular Structure

2007 ◽  
pp. 1-117 ◽  
Author(s):  
Francis A. Carey ◽  
Richard J. Sundberg
Keyword(s):  
Molecular Structure ◽  
Chemical Bonding

Real-Space Imaging of a Single-Molecule Monoradical Reaction

2020 ◽  
Vol 142 (31) ◽  
pp. 13550-13557 ◽  
Author(s):  
Shaotang Song ◽  
Na Guo ◽  
Xinzhe Li ◽  
Guangwu Li ◽  
Yohei Haketa ◽  
...  
Keyword(s):  
Single Molecule ◽  
Real Space

DYNAMIC JAHN-TELLER COUPLING, ANHARMONIC OXYGEN VIBRATIONS AND HIGH-Tc SUPERCONDUCTIVITY IN OXIDES

1989 ◽  
Vol 03 (18) ◽  
pp. 1367-1374 ◽  
Author(s):  
K. H. JOHNSON ◽  
D. P. CLOUGHERTY ◽  
M. E. McHENRY
Keyword(s):  
Chemical Bonding ◽  
Fermi Energy ◽  
Real Space ◽  
Bcs Theory ◽  
Cooper Pairing ◽  
Phonon Coupling ◽  
High Tc ◽  
Isotope Shifts ◽  
Oxygen Oxygen ◽  
Jahn Teller

A universal dynamic Jahn-Teller (DJT) mechanism for superconductivity and its applications to CuO and BaBiO 3 high-T c oxides are reviewed. Dynamical interconversion between the shallow "double-well" potentials of degenerate delocalized oxygen-oxygen "pπ-bonds" at the Fermi energy (E F ) induces anharmonic oxygen vibrations, lattice-electron coupling, and Cooper pairing. This mechanism yields high T c 's and small-to-vanishing isotope shifts for cuprates, where O (pπ)- O (pπ) bond overlap at E F is promoted by Cu (dπ*)- O (pπ) hybridization. It yields lower T c 's and larger isotope shifts for BaBiO 3's, where O (pπ)- O (pπ) overlap is small. For vanishing bond overlap at E F , DJT coupling reduces to harmonic phonon coupling in BCS theory. Simple formulae for calculating T c and isotope shifts for any superconductor from the "real-space" chemical bonding at E F are presented, yielding (T c ) max ≈ 230 K .

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