Issues concerning the investigation of hyperpolarizability tensor of organic molecules by depolarized hyper-Rayleigh scattering

1996 ◽  
Author(s):  
K. Y. Wong ◽  
S. W. Wong
Keyword(s):  
Rayleigh Scattering ◽  
Organic Molecules

FUNDAMENTAL LIMITS: DEVELOPING NEW TOOLS FOR A BETTER UNDERSTANDING OF SECOND-ORDER MOLECULAR NONLINEAR OPTICS

2009 ◽  
Vol 18 (03) ◽  
pp. 401-440 ◽  
Author(s):  
JAVIER PÉREZ-MORENO ◽  
KOEN CLAYS
Keyword(s):  
Nonlinear Optical ◽  
Rayleigh Scattering ◽  
Organic Molecules ◽  
Sum Rules ◽  
Thomas Kuhn ◽  
Fundamental Limits ◽  
Fundamental Parameters ◽  
Organic Chromophores ◽  
Scattering Measurements ◽  
Optical Behavior

The generalized Thomas-Kuhn sum rules are used to characterize the nonlinear optical response of organic chromophores in terms of fundamental parameters that can be measured experimentally. The nonlinear optical performance of organic molecules is evaluated from the combination of hyper-Rayleigh scattering measurements and the analysis in terms of the fundamental limits. Different strategies for the enhancement of nonlinear optical behavior at the molecular and supramolecular level are evaluated and new paradigms for the design of more efficient nonlinear optical molecules are proposed and investigated.

First-order hyperpolarizability of organic molecules: hyper-Rayleigh scattering and applications

2020 ◽  
pp. 275-314
Author(s):  
Marcelo G. Vivas ◽  
Daniel L. da Silva ◽  
Cleber R. Mendonca ◽  
Leonardo De Boni
Keyword(s):  
Rayleigh Scattering ◽  
Organic Molecules ◽  
First Order

Evaluation of Hyperpolarizability of Nonlinear Optical Organic Molecules by Hyper-Rayleigh Scattering

1996 ◽  
Vol 35 (Part 1, No. 12A) ◽  
pp. 6074-6078 ◽  
Author(s):  
Takuo Kodaira ◽  
Akira Watanabe ◽  
Osamu Ito ◽  
Minoru Matsuda ◽  
Koen Clays ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Rayleigh Scattering ◽  
Organic Molecules

scholarly journals The anisotropy of the aliphatic C-C bond

1974 ◽  
Vol 27 (2) ◽  
pp. 399 ◽  
Author(s):  
RK Pierens
Keyword(s):  
Conformational Analysis ◽  
Rayleigh Scattering ◽  
Organic Molecules ◽  
Fundamental Importance ◽  
Electric Birefringence ◽  
Experimental Parameters

In the conformational analysis of organic molecules by electric birefringence and Rayleigh scattering techniques, the value assigned to the aliphatic C-C bond, γC-C, is of fundamental importance. Thiscommunication discusses the implications of recent changes in the experimental parameters used to derive γC-C.

High Resolution Replication of Organoclay Surfaces

1982 ◽  
Vol 40 ◽  
pp. 576-577
Author(s):  
W. W. Barker ◽  
W. E. Rigsby ◽  
V. J. Hurst ◽  
W. J. Humphreys
Keyword(s):  
Clay Mineral ◽  
Organic Molecule ◽  
Organic Molecules ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
X Ray ◽  
Naturally Occurring ◽  
Silicate Layers ◽  
Mineral Identification

Experimental clay mineral-organic molecule complexes long have been known and some of them have been extensively studied by X-ray diffraction methods. The organic molecules are adsorbed onto the surfaces of the clay minerals, or intercalated between the silicate layers. Natural organo-clays also are widely recognized but generally have not been well characterized. Widely used techniques for clay mineral identification involve treatment of the sample with H2 O2 or other oxidant to destroy any associated organics. This generally simplifies and intensifies the XRD pattern of the clay residue, but helps little with the characterization of the original organoclay. Adequate techniques for the direct observation of synthetic and naturally occurring organoclays are yet to be developed.

Direct phase determination in electron crystallography: small organic molecules

1992 ◽  
Vol 50 (2) ◽  
pp. 1166-1167
Author(s):  
Douglas L. Dorset
Keyword(s):  
Organic Molecules ◽  
Data Sets ◽  
Temperature Structure ◽  
3D Analysis ◽  
Intensity Data ◽  
Electron Crystallography ◽  
Phase Determination ◽  
Measured Intensity ◽  
3D Data

The quantitative use of electron diffraction intensity data for the determination of crystal structures represents the pioneering achievement in the electron crystallography of organic molecules, an effort largely begun by B. K. Vainshtein and his co-workers. However, despite numerous representative structure analyses yielding results consistent with X-ray determination, this entire effort was viewed with considerable mistrust by many crystallographers. This was no doubt due to the rather high crystallographic R-factors reported for some structures and, more importantly, the failure to convince many skeptics that the measured intensity data were adequate for ab initio structure determinations.We have recently demonstrated the utility of these data sets for structure analyses by direct phase determination based on the probabilistic estimate of three- and four-phase structure invariant sums. Examples include the structure of diketopiperazine using Vainshtein's 3D data, a similar 3D analysis of the room temperature structure of thiourea, and a zonal determination of the urea structure, the latter also based on data collected by the Moscow group.

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