Charge and Exciton Transport through Molecular Wires / Edition 1

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Overview

As functional elements in opto-electronic devices approach the singlemolecule limit, conducting organic molecular wires are the appropriate interconnects that enable transport of charges and charge-like particles such as excitons within the device. Reproducible syntheses and a thorough understanding of the underlying principles are therefore indispensable for applications like even smaller transistors, molecular machines and light-harvesting materials. Bringing together experiment and theory to enable applications in real-life devices, this handbook and ready reference provides essential information on how to control and direct charge transport. Readers can therefore obtain a balanced view of charge and exciton transport, covering characterization techniques such as spectroscopy and current measurements together with quantitative models. Researchers are thus able to improve the performance of newly developed devices, while an additional overview of synthesis methods highlights ways of producing different organic wires. Written with the following market in mind: chemists, molecular physicists, materials scientists and electrical engineers.

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Editorial Reviews

From the Publisher
"Overall, this book is very readable and well structured withup-to-date references. It will surely gain a lot of attention froma broad range of scientists and engineers interested in theexciting world of molecular wires but also from scientists involvedin a wider spectrum of backgrounds including physics, materialscience, biology, spectroscopy, chemistry and engineering. We haveenjoyed reading this book very much!." (Materials Views, 2 June2011)
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Product Details

  • ISBN-13: 9783527325016
  • Publisher: Wiley
  • Publication date: 3/29/2011
  • Edition number: 1
  • Pages: 334
  • Product dimensions: 6.90 (w) x 9.60 (h) x 0.80 (d)

Meet the Author

Laurens Siebbeles studied chemistry at the Free University inAmsterdam and obtained his PhD degree at the FOMInstitute forAtomic and Molecular Physics in Amsterdam. He was a post-doc at theUniversity of Paris Sud in France. Currently he is Professor inopto-electronic materials at the Delft University of Technology inThe Netherlands. He studies the dynamics of charges and excitons inmolecular materials and semiconductor nanocrystals. Charges andexcitons are produced with high-energy electron or laser pulses andprobed by time-resolved optical and microwave or terahertzmeasurements. The experiments are supported by theory of charge andexciton dynamics.

Ferdinand Grozema studied chemistry at the University of Groningenand obtained his PhD degree at the Delft University of Technology.In 2007 he spent 7 months working as a visiting scholar atNorthwestern University in Evanston, USA. Currently he is anAssistant Professor in the opto-electronic materials section at theChemical Engineering Department of the Delft University ofTechnology in Delft. His research interests consist of theoretical and experimental studies of theproperties and dynamics of excited states in bio/organic materials.The main focus of this research has been on charge transport inconjugated molecular wires and in DNA.

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Table of Contents

INTRODUCTION: MOLECULAR ELECTRONICS AND MOLECULAR WIRES
Introduction
Single-Molecule Devices
Transport of Charges and Excitons in Molecular Wires

PART I: Molecules between Electrodes

QUANTUM INTERFERENCE IN ACYCLIC MOLECULES
Introduction
Theoretical Methods
Interference in Acyclic Cross-Conjugated Molecules
Understanding Interference in Model Systems
Using Interference for Devices
Probing the Limits of Calculations: Important Real-WorldPhenomena
Conclusions

HOPPING TRANSPORT IN LONG CONJUGATED MOLECULAR WIRES CONNECTED TOMETALS
Introduction
Charge Transport Mechanisms
Oligophenylene Imine Molecular Wires: A Flexible System forExamining the Physical Organic Chemistry of Hopping Conduction inMolecules
Outlook: Probing the Physical Organic Chemistry of HoppingConduction

PART II: Donor-Bridge-Acceptor Systems

TUNNELING THROUGH CONJUGATED BRIDGES IN DESIGNEDDONOR-BRIDGE-ACCEPTOR MOLECULES
Introduction
Through-Bond Electronic Coupling in Pi-Conjugated Bridges
Conclusions

BASE PAIR SEQUENCE AND HOLE TRANSFER THROUGH DNA: RATIONAL DESIGNOF MOLECULAR WIRES
Introduction
Spectral Signatures of Charge Transfer
Charge Injection into A-Tracts
Crossover from Superexchange to Hopping in Sa—An—Sd
Symmetry Breaking in Sa—An—Sa
Influence of a Single G on Charge Transport
Molecular Wire Behavior in Sa—A2-3G1-7—SD
Charge Transfer through Alternating Sequences
Theoretical Descriptions of Charge Transfer through DNA
Conclusion

CHARGE TRANSPORT THROUGH MOLECULES: ORGANIC NANOCABLES FORMOLECULAR ELECTRONICS
Introduction
Theoretical Concepts
Charge Transport along Pi-Conjugated Bridges in C60-ContainingDonor-Bridge-Acceptor Conjugates
Conclusion

PART III: Charge Transport through Wires in Solution

ELECTRON AND EXCITON TRANSPORT TO APPENDED TRAPS
Introduction
Experimental Methods to Investigate Transport to AppendedTraps
Results on Transport to Traps
Comparison and Perspectives

ELECTRON LATTICE DYNAMICS AS A METHOD TO STUDY CHARGE TRANSPORT INCONJUGATED POLYMERS
Introduction
Methodology
Results
Summary

CHARGE TRANSPORT ALONG ISOLATED CONJUGATED MOLECULAR WIRES MEASUREDBY PULSE RADIOLYSIS TIME-RESOLVED MICROWAVE CONDUCTIVITY
Introduction
Pulse-Radiolysis Time-Resolved Microwave Conductivity
Mechanisms for Charge Transport along Conjugated Chains
The Meaning of the Mobility at Microwave Frequencies
Charge Transport along Ladder-Type PPP
Effect of Torsional Disorder on the Mobility
Effect of Chain Coiling on the Mobility of Charges
Supramolecular Control of Charge Transport along MolecularWires
Summary and Outlook

PART IV: Exciton Transport through Conjugated Molecular Wires

STRUCTURE PROPERTY RELATIONSHIPS FOR EXCITON TRANSFER IN CONJUGATEDPOLYMERS
Introduction
Signal Gain in Aplifying Fluorescent Polymers
Directing Energy Transfer within CPs: Dimensionality and MolecularDesign
Lifetime Modulation
Conformational Dependence on Energy Migration: ConjugatedPolymer-Liquid Crystal Solutions
Conclusions

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