Excited States V3

1st Edition - April 28, 1978
Editor: Edward Lim
Language: English
eBook ISBN:
9 7 8 - 0 - 3 2 3 - 1 5 4 1 4 - 7

Excited States, Volume 3 deals with excited states and covers topics ranging from two-photon molecular spectroscopy in liquids and gases to time evolution of excited molecular… Read more

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Excited States, Volume 3 deals with excited states and covers topics ranging from two-photon molecular spectroscopy in liquids and gases to time evolution of excited molecular states. Product energy distributions in the dissociation of polyatomic molecules are also discussed, along with the mechanism of optical nuclear polarization in molecular crystals and vibronic interactions and luminescence in aromatic molecules with non-bonding electrons. Comprised of five chapters, this volume begins with a didactic treatment of the theory of simultaneous two-photon absorption spectroscopy from the point of view concerned primarily with molecular gases and liquids. The basic theoretical quantity is shown to be an absorption tensor, as contrasted with the absorption vector of one-photon spectroscopy. The next chapter considers the time evolution of a molecular system interacting with a photon wave packet. The theory is applied to handle photon scattering from several physical models for molecular level structure in excited electronic states of polyatomic molecules. The remaining chapters explore various polyatomic decomposition processes and the basic features governing the internal energy distribution of the fragments; optical nuclear polarization in molecular crystals and vibronic interactions; and luminescence in aromatic molecules with non-bonding electrons. This book should be of interest to chemists and molecular physicists.

List of Contributors

Contents of Previous Volumes

Two-Photon Molecular Spectroscopy in Liquids and Gases

I. Introduction

II. Phenomenology and Applications

III. Reviews

IV. Basic Physics of Two-Photon Absorption

V. Liquids

VI. Gases of Symmetric Rotor Molecules

References

Time-Evolution of Excited Molecular States

I. Prologue

II. Quantum Mechanical Treatment of a Light Pulse

III. General Theory of Photon Counting

IV. The Two-Level System

V. Doorway States and Photon Scattering from a General Molecular Level Scheme

VI. General Expressions for Emission Quantum Yields

VII. Comments on the Relation between Time-Resolved Observables and the Optimal Absorption Lineshape

VIII. Photon Scattering from a Single Molecular Resonance and Effects of Collisional Perturbations

IX. The Effective Hamiltonian and Independently Decaying Levels

X. Time-Resolved Photon Scattering from Large Molecules

XI. Photon Scattering from a Dissociative Continuum

XII. Epilogue

References

Product Energy Distributions in the Dissociation of Polyatomic Molecules

I. Introduction

II. Simple Models of Polyatomic Molecule Dissociation

III. Franck-Condon Transition Amplitude for Molecular Dissociation

IV. Final State Interactions

V. Numerical Calculations and Comparison with Experiments

VI. Generalized Simple Golden Rule Model Derived from Full Quantum Theory

VII. Bending and Rotational Degrees of Freedom

VIII. Applications to Chemical Reactions

References

The Mechanism of Optical Nuclear Polarization in Molecular Crystals

I. Introduction and Definition of Nuclear Polarization

II. Nuclear Spin Polarization Methods

III. Some Physics of Excited Molecular States

IV. Optical Electron Polarization

V. Optical Nuclear Polarization

VI. Optical Nuclear Polarization: Theory

VII. Experimental and Numerical ONP in Phenazine

VIII. Optical Nuclear Polarization by Level Anti-Crossing

IX. Level Anti-Crossing in Doped Fluorene Crystals

X. General Discussion

References

Vibronic Interactions and Luminescence in Aromatic Molecules with Nonbonding Electrons

I. Introduction

II. Vibronic Interactions in the Weak Coupling Limit and Radiative Transitions

III. Vibronic Interactions in the Strong Coupling Limit and Radiative Transitions

IV. Radiationless Transitions

V. Conclusions

References

Author Index

Subject Index