Relation Between Bond-Length Alternation and Second Electronic Hyperpolarizability of Conjugated Organic Molecules
- 9 July 1993
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 261 (5118) , 186-189
- https://doi.org/10.1126/science.261.5118.186
Abstract
The solvent dependence of the second hyperpolarizability, γ, of a variety of unsaturated organic compounds has been measured by third harmonic generation at 1907 nanometers. It is seen that the measured γ is a function of solvent polarity. These solvent-dependent hyperpolarizabilities are associated with changes in molecular geometry from a highly bond-length alternated, polyene-like structure for a formyl-substituted compound in non-polar solvents, to a cyanine-like structure, with little bond-length alternation, for a dicyanovinyl-substituted compound in polar solvents. By tuning bond-length alternation, γ can be optimized in either a positive or negative sense for polymethine dyes of a given conjugation length.Keywords
This publication has 21 references indexed in Scilit:
- Direct observation of reduced bond-length alternation in donor/acceptor polyenesJournal of the American Chemical Society, 1993
- A simplified three‐level model describing the molecular third‐order nonlinear optical susceptibilityInternational Journal of Quantum Chemistry, 1992
- The role of soliton—antisoliton configurations with Ag symmetry in the nonlinear optical response of polyacetyleneChemical Physics Letters, 1992
- Experimental investigations of organic molecular nonlinear optical polarizabilities. 2. A study of conjugation dependencesThe Journal of Physical Chemistry, 1991
- Experimental investigations of organic molecular nonlinear optical polarizabilities. 1. Methods and results on benzene and stilbene derivativesThe Journal of Physical Chemistry, 1991
- The effectiveness of solvents as hydrogen bond donorsJournal of Solution Chemistry, 1991
- Approaches for Optimizing the First Electronic Hyperpolarizability of Conjugated Organic MoleculesScience, 1991
- Applications requirements for nonlinear-optical devices and the status of organic materialsJournal of the Optical Society of America B, 1989
- Structure of α,ω-diphenyl-polyenes. IV. Crystal and molecular structure of 1,8-diphenyl-1,3,5,7-octatetraeneActa Crystallographica, 1955
- Color and Constitution. X.1 Absorption of the Merocyanines2Journal of the American Chemical Society, 1951