Structure-property relationships in third-order nonlinear optical chromophores

Article Abstract:

The structure-function relationships in third-order nonlinear optical chromophores were investigated using third harmonic generation. A series of donor and/or acceptor substituted analogues of 1,2-diethynylethenes and tetraethynylethenes was measured to examine the pathways leading to enhanced optical nonlinearities. The molecular properties that were found to affect the second hyperpolarizability include heteroaromatic conjugation, conjugation length, degree of donor-acceptor substitution, geminal donor-acceptor conjugation, cis, trans and molecular asymmetry.

Molecular structure, Nonlinear optics, Inorganic compounds

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One- and two-dimensionally conjugated tetraethynylethenes: structure versus second-ordeer optical polarizabilities

Article Abstract:

Completely conjugated donor-acceptor derivatives of organic molecules have broad technological applications. Scientific investigations were performed to examine the structure-property relationships of the tetraethynylethenes (TEEs). The structure, dipole moments and first-order hyperpolarizability of the TEE beta samples were likewise analyzed. An electric-field-induced second-harmonic (EFISH) generation method was utilized. A betaEFISH equal to (510 plus or equal to 100) x 10(super-40) m4/V was recorded.

Organic compounds, Electron donor-acceptor complexes, Dipole moments

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Ionic transport in glassy networks with high electronic polarizabilities: Conductivity spectroscopic results indicating a vacancy-type transport mechanism

Article Abstract:

The influence of electronic polarizability of a glass network on ion dynamics and transport was studied. The results suggested that the electronic polarizability of a glass network strongly influences the distribution of ionic site energies.

Science & research, Electric properties, Ions

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