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Three octopolar molecules

Prior to discussing the properties of octopolar molecules, it is instructive to consider first some of the basic properties of tensors. In general, any tensor of rank n can be decomposed in a sum of so-called irreducible tensors that are invariant under three-dimensional rotation [99] ... [Pg.3438]

For the hyperpolarizability of purely octopolar molecules, all irreducible tenso-rial components of weight strictly lower than three cancel due to symmetry requirements and P = P [99]. For other molecules, the hyperpolarizability can contain contributions of all irreducible tensor components, depending on the symmetry of the molecule. [Pg.3439]

The area of molecular nonlinear optics has been rejuvenated by efforts to investigate three-dimensional multipolar systems, functionalized polymers as optoelectronic materials, near infrared optical parametric oscillators and related aspects.71 There have been some advances in chromophore design for second-order nonlinear optical materials 72 these include onedimensional CT molecules, octopolar compounds and organometallics. Some of the polydiacetylenes and poly(/>-phenylenevinylene)s appear to possess the required properties for use as third-order nonlinear optical materials for photonic switching.73... [Pg.12]

Some examples of intuition-based or modeling-based advances in nonlinear properties, specifically the first hyperpolarizability response p, have been developed in the past three decades. These include the bond-length alternation motif, the idea of octopolar molecular structures, the stronger responses of excited states and the use of purposely twisted -ir-electron molecules to modify the admixture of quinoid and aromatic structures. [Pg.692]


See other pages where Three octopolar molecules is mentioned: [Pg.3438]    [Pg.845]   
See also in sourсe #XX -- [ Pg.264 ]




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Octopolar molecules

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