J-aggregates / editor, T. Kobayashi.

Format:

Book

Contributor:

Kobayashi, T. (Takayoshi)

Language:

English

Subjects (All):

Aggregation (Chemistry).

Dyes and dyeing.

Physical Description:

1 online resource (237 p.)

Place of Publication:

Singapore ; River Edge, N.J. : World Scientific, c1996.

Language Note:

English

Summary:

J-aggregates have a long history of research but so far no books have been published on this group of very interesting materials. The book is on the structures, electronic states, linear and nonlinear optical properties and spectroscopies of the J-aggregates. Various properties and processes of J-aggregates such as superradiance, excitons, photon echo, geometrical structure, electron transfer and femtosecond spectroscopy are also discussed. The contributors are those actively working in the field.

Contents:

Preface; CONTENTS; CHROMOPHORE COUPLING EFFECTS; 1. Absorption of Isolated Molecules; 2. Interaction of two dye molecules in proximity.; 2.1 Sandwich dimers; 2.2 Arbitrary arrangement of two equal dye molecules; 2.3 Extended dipole model; 3. Absorption of J-aggregates; 3.1 Absorption of aggregates of N molecules.; 3.2 The Scheibe coin-pile model; 3.3 The brickstone model of J-aggregates; 3.4 Purposely constructed brickstone arrangement; 3.5 J-band shift in electric field to probe π-electron distribution; 4. Emission of J-aggregates; 4.1 Life Time of Emission. Superradiance

4.2 Estimating N and its temperature dependence. Size and shape of coherent exciton4.3 Soliton Motion through aggregate: test by incorporating acceptor as exciton trap; 4.4 Modelling exciton motion; 4.5 Long range energy transfer from J-aggregate to acceptor; 4.6 Aggregates of finite size; 4.7 Oscillating charge distribution in exciton; 4.8 J-band shape for N = 9; 5. Brickstone model extension; 5.1 Spectral features; 5.2 Exciton motion; 5.3 Fluorescence lifetime and delocalization; Conclusions; References; Hierarchical Structure in Oriented J-aggregates; 1. Introduction; 2. Experimental

2.1. Vertical spin-coating2.2. Hole-burning; 2.3. Electroabsorption; 3. Linear Dichroism; 3.1. Concentration dependence of the absorption spectrum; 3.2. Two components in the J-band; 3.3. Extracted spectra; 3.4. Morphological comparison of the absorption spectra; 4. Hole-burning; 4.1. Results; 4.2. Mechanism of the hole-burning; 5. Electroabsorption; 5.1. Possible mechanisms of EO response in J-aggregates; 5.2. Dual-phase detection; 5.3. Polarization dependence of electroabsorption; 5.4. Large static dipole moment; 5.5. Electric Held induced absorption

5.6. Polarizability change and size estimate6. Hierarchical structure; References; STRUCTURE AND EXCITON EMISSION DYNAMICS OF MOLECULAR AGGREGATES: CYANINES AND PORPHYRINS; I. Introduction; II. Raman Scattering by Aggregated Molecules: Synopsis; A. Theoretical Concepts; B. Experimental Determinations; III. Exciton Emission Dynamics; IV. Structure and Emission Dynamics of Aggregated Tetrakis(p-Sulfonatophenyl)Porphyrin; A. Background; B. Experimental; 1. Absorption and Fluorescence Apparatus; 2. Fluorescence Lifetime Apparatus; 3. Raman Apparatus; C. Results and Discussions

1. Fluorescence and Decay Kinetics of the TSPP Aggregate2. Resonance Raman Spectra and Band Assignments of Aggregated TSPP; V. Summary; Acknowledgments; References; MOLECULAR AGGREGATE SPECTRA; 1 Introduction; 2 The aggregate Hamiltonian; 3 One-exciton states in a perfect aggregate; 4 Exciton-phonon coupling; 5 Solvent fluctuations; 6 Electronic excitations beyond the simple exciton picture; 7 References; Theory of Pump-Probe Spectroscopy of Molecular J-Aggregates; 1. Introduction; 2 General theory of the pump-probe spectrum

2.1 Relation of the pump-probe spectrum to optical response functions

Notes:

Description based upon print version of record.

Includes bibliographical references.

ISBN:

9789812830029

9812830022