On the molecular optical nonlinearity of halogen-bond-forming azobenzenes

2018 ◽  
Vol 20 (45) ◽  
pp. 28810-28817 ◽  
Author(s):  
Matti Virkki ◽  
Anthony Maurice ◽  
Alessandra Forni ◽  
Maurizio Sironi ◽  
Valentina Dichiarante ◽  
...  
Keyword(s):  
Rayleigh Scattering ◽  
Halogen Bond ◽  
Optical Nonlinearity ◽  
Bond Forming ◽  
Molecular Hyperpolarizability

We study hyper-Rayleigh scattering and computed molecular hyperpolarizability in a series of azobenzene chromophores in chloroform and dimethylformamide as solvents.

Theoretical Framework of 1,3-Thiazolium-5-Thiolates Mesoionic Compounds: Exploring the Nature of Photophysical Properties and Molecular Nonlinearity

2020 ◽  
Author(s):  
Zeyu Liu ◽  
Shugui Hua ◽  
Tian Lu ◽  
Ziqi Tian
Keyword(s):  
Optical Properties ◽  
Rational Design ◽  
Rayleigh Scattering ◽  
Function Analysis ◽  
Theoretical Calculations ◽  
Photophysical Properties ◽  
Optical Nonlinearity ◽  
Nonlinear Properties ◽  
Photoelectric Performance ◽  
Wave Function Analysis

Inspired by a previous experimental study on the first-order hyperpolarizabilities of 1,3-thiazolium-5-thiolates mesoionic compounds using Hyper-Rayleigh scattering technique, we theoretically investigated the UV-Vis absorption spectra and every order polarizabilities of these mesoionic molecules. Based on the fact that the photophysical and nonlinear properties observed in the experiment can be perfectly replicated, our theoretical calculations explored the essential characteristics of the optical properties of the mesoionic compounds with different electron-donating groups at the level of electronic structures through various wave function analysis methods. The influence of the electron-donating ability of the donor on the optical properties of the molecules and the contribution of the mesoionic ring moiety to their optical nonlinearity are clarified, which have not been reported by any research so far. This work will help people understand the nature of optical properties of mesoionic-based molecules and provide guidance for the rational design of molecules with excellent photoelectric performance in the future.

Second-order optical nonlinearity study of CdS nanoparticles via hyper-Rayleigh scattering

2001 ◽  
Vol 62 (5) ◽  
pp. 903-906 ◽  
Author(s):  
Yu Zhang ◽  
Xin Wang ◽  
Degang Fu ◽  
Jiqi Cheng ◽  
Yaochun Shen ◽  
...  
Keyword(s):  
Rayleigh Scattering ◽  
Optical Nonlinearity ◽  
Second Order ◽  
Cds Nanoparticles

Oxidatively Induced Carbon−Halogen Bond-Forming Reactions at Nickel

2009 ◽  
Vol 28 (21) ◽  
pp. 6142-6144 ◽  
Author(s):  
Andrew T. Higgs ◽  
Paul J. Zinn ◽  
Sarah J. Simmons ◽  
Melanie S. Sanford
Keyword(s):  
Halogen Bond ◽  
Bond Forming ◽  
Bond Forming Reactions

scholarly journals QUANTUM CHANNELS IN NONLINEAR OPTICAL PROCESSES

2009 ◽  
Vol 18 (02) ◽  
pp. 285-299 ◽  
Author(s):  
DAVID S. BRADSHAW ◽  
DAVID L. ANDREWS
Keyword(s):  
Quantum Electrodynamics ◽  
Nonlinear Optical ◽  
Rayleigh Scattering ◽  
Third Harmonic Generation ◽  
Optical Nonlinearity ◽  
Quantum Channels ◽  
Third Harmonic ◽  
New Type ◽  
Specific Quantum ◽  
Illustrative Application

Quantum electrodynamics furnishes a new type of representation for the characterisation of nonlinear optical processes. The treatment elicits the detailed role and interplay of specific quantum channels, information that is not afforded by other methods. Following an illustrative application to the case of Rayleigh scattering, the method is applied to second and third harmonic generation. Derivations are given of parameters that quantify the various quantum channels and their interferences; the results are illustrated graphically. With given examples, it is shown in some systems that optical nonlinearity owes its origin to an isolated channel, or a small group of channels.

scholarly journals Selective Halogenation of Pyridines Using Designed Phosphine Reagents

2019 ◽  
Author(s):  
Jeffrey N. Levy ◽  
Ren-Rong Liu ◽  
Andrew McNally
Keyword(s):  
Metal Complexes ◽  
Late Stage ◽  
Halogen Bond ◽  
Building Blocks ◽  
Phosphonium Salts ◽  
Bond Forming

Halopyridines are key building blocks for synthesizing pharmaceuticals, agrochemicals, and ligands for metal complexes, but strategies to selectively halogenate pyridine C–H precursors are lacking. We designed a set of heterocyclic phosphines that are selectively installed at the 4-position of pyridines as phosphonium salts and then displaced with halide nucleophiles. A broad range of unactivated pyridines can be halogenated, and the method is viable for late-stage halogenation of complex pharmaceuticals. The study concludes that both tuning the phosphonium electrophilicity and pyridine substitution patterns influence the efficiency of the carbon-halogen bond-forming step.<br>

Multifunctional Hyper-Structured Molecules

1997 ◽  
Vol 488 ◽  
Author(s):  
T. Wada ◽  
Y. Zhang ◽  
T. Aoyama ◽  
Y. Kubo ◽  
H. Sasabe
Keyword(s):  
Rayleigh Scattering ◽  
Molecular Design ◽  
Phase Conjugation ◽  
Three Dimensional ◽  
Target Function ◽  
Molecular Systems ◽  
Optical Image Processing ◽  
Electro Optic ◽  
Molecular Hyperpolarizability ◽  
Cyclic Oligomers

AbstractTo fill the gap between molecular design and the architecture of three-dimensional functional structures, we propose novel hyper-structured molecules (HSMs) based on welldefined and topologically controlled molecular systems. To this end we have developed carbazole dendrimers, trimers, cyclic oligomers and chromogenic calix[4]arenes as HSMs. Photorefractivity was selected as the primary target function of these HSMs. Oligomers developed in our laboratory exhibit intrinsic photocarrier generation, transport, electro-optic, film-forming and poling properties. These multifunctional properties allow us to demonstrate optical image processing using optical phase conjugation. The topological shapes of indoaniline-derived calix[4]arenes were studied by hyper-Rayleigh scattering. The two indoaniline moieties in calix[4]arene derivatives were pre-aligned so as to enhance the net molecular hyperpolarizability. Besides dendric oligomers, cyclic oligomers can be used as a molecular platform which allows molecular level tuning of shape, size and topology for superior opto-electronic functions.

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