Utilization of intramolecular energy and electron transfer processes in bichromophoric molecules for electro-optics applications

Shammai Speiser

doi:10.1117/12.328183

16 October 1998 Utilization of intramolecular energy and electron transfer processes in bichromophoric molecules for electro-optics applications

Shammai Speiser

Author Affiliations +

Proceedings Volume 3473, Third-Order Nonlinear Optical Materials; (1998) https://doi.org/10.1117/12.328183
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

In recent years bichromophoric compounds have emerged as promising candidates for electro-optics applications. A bichromophoric molecule D-B-A may be defined as a molecule built of two distinguishable molecular units D and A connected by a molecular bridge B. The properties of the bridge determine the flexibility of the whole bichromophoric structure. For a bichromophoric molecule the electronic absorption spectrum can be described by a simple superposition of the absorption spectra of the two chromophores. The bridge serves as a molecular spacer unit which does not influence the basic electronic structure of the two chromophores while preventing intrachromophore interaction in their ground state. However, electronic excitation of either chromophore may lead to intramolecular electronic interactions and to the observation of phenomena such as intramolecular complex formation intramolecular proton transfer, intramolecular electron transfer intramolecular electronic energy transfer. The main problem is to differentiate between all these processes which may act simultaneously and competitively and to be able utilize the various transfer processes for information storage or information transfer, thus performing a switching act on the molecular level as being done in nature in various biological systems. Several examples will be discussed.

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Shammai Speiser "Utilization of intramolecular energy and electron transfer processes in bichromophoric molecules for electro-optics applications", Proc. SPIE 3473, Third-Order Nonlinear Optical Materials, (16 October 1998); https://doi.org/10.1117/12.328183

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