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  • Title
  • CERTIFICATE
  • DECLARATION
  • ACKNOWLEDGEMENT
  • CONTENTS
  • 1. Introduction
  • 1.1 General
  • 1.2 Charge Transport in DNA
  • 1.3 Aqueous Radiation Chemistry: Pulse and Steady State Radiolysis Technique
  • 1.4 Radiation Chemistry of DNA - Direct end Indirect Effect
  • 1.5 Femtochemistry: Real Time Measurements
  • Fig.1.8 Principle of fluorescence upconversion
  • Fig.1.9 Schematic diagram of fluorescence upconversion setup
  • Fig.1.10 Schematic diagram of time-correlated single Photon counting technique
  • Fig.1.11 Schematic diagram of transient absorption setup. M: mirror, L: Lens
  • 1.6 Objectives
  • References
  • 2. Materials and Methods
  • 2.1 Materials
  • 2.2 Radiation Chemical Studies
  • Fig.2.1 Pulse radiolysis setup at BARC, Mumbai
  • 2.3 Femtosecond Spectroscopy
  • Fig. 2.2 Schematic representations of the cavity-dumped near infraredoptical parametric oscillator
  • Fig.2.3 Near IR cavity dumped femtosecond optical parametric oscillator
  • Fig.2.4 Schematic representation of Ferntosecond fluorescence upconversion setup
  • Fig.2.5 Schematic representation of Time correlated single photon counting setup
  • 2.4 Steady State Absorption and Fluorescence Measurements
  • References
  • 3. Properties of the Radical Cation and Radical Anion of 2-Aminopurine and its Charge Transfer Reactions in the Presence of Nucleobases in Aqueous Medium
  • Publications from this chapter
  • 3.1 Charge Transfer in Supramolecular Assemblies of DNA
  • 3.2 Reactions of Hydrated Electron (eaq) with 2-Aminopurine and the Properties of the Electron Adduct
  • 3.3 Reactions of Sulfate Radical Anion (SO4) with 2-Aminopurine and the Properties of the Radical Cation
  • 3.4. Reactions of Hydroxyl Radical (OH) with 2-Aminopurine
  • 3.5 Reactions of Oxide Radical Anion (O) with 2-Aminopurine
  • 3.6 Charge Transfer to Thymine and Guanosine
  • 3.7 Conclusion
  • Reference
  • 4. Reduction Reactions of Some Amino Pyrimidines
  • 4.1 Reaction of Hydrated Electron with Nucleobases
  • 4.2 Kinetics
  • 4.3 Properties of the Transient Absorption Spectra of Aminopyrimidines
  • 4.4 Conclusion
  • Reference
  • 5. Ultrafast Charge Transfer Dynamics in 2-Aminopurine Modified Double Helical DNA
  • Publications from this chapter
  • 5.1 Charge Transport in DNA
  • 5.2 Steady State Spectroscopy
  • Fig.5.1 UV-VIS spectra
  • Fig.5.2 Fluorescence spectra of duplexes:
  • Fig.5.3 Fluorescence spectra of single strands
  • 5.3 Decay Kinetics: Femtosecond Fluorescence Upconversion Technique
  • 5.4 Decay Kinetics: Time correlated Single Photon Counting (TCSPC)
  • 5.5 Dynamics of Charge Transfer evaluation from Upconversion and TCSPC Data
  • 5.6 Conclusion
  • References
  • LIST OF PUBLICATIONS
  • Publications from the thesis
  • Other Publications
  • Papers published in the proceedings of conferences/symposia