Unusual response to environmental polarity in a nonlinear-optical benzylidene-type chromophore containing a 1,3-bis(dicyanomethylidene)indane acceptor fragment

2018 ◽  
Vol 20 (1) ◽  
pp. 404-413 ◽  
Author(s):  
Kaspars Traskovskis ◽  
Arturs Bundulis ◽  
Igors Mihailovs
Keyword(s):  
Torsion Angle ◽  
Nonlinear Optical ◽  
Surrounding Medium ◽  
Medium Polarity ◽  
Donor And Acceptor

The torsion angle between the planes of donor and acceptor fragments in 1,3-bis(dicyanomethylidene)indane based benzylidene increases with the surrounding medium polarity.

scholarly journals Push–pull pyropheophorbides for nonlinear optical imaging

2017 ◽  
Vol 15 (4) ◽  
pp. 947-956 ◽  
Author(s):  
Anjul Khadria ◽  
Yovan de Coene ◽  
Przemyslaw Gawel ◽  
Cécile Roche ◽  
Koen Clays ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Lipid Membranes ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Two Photon ◽  
Donor And Acceptor ◽  
Nonlinear Optical Imaging ◽  
Pyropheophorbide A ◽  
Electron Donor And Acceptor ◽  
Derivatives Of

We have synthesized derivatives of pyropheophorbide-a with electron donor and acceptor groups which localize in lipid membranes and can be used for multi-photon imaging via second harmonic generation and two-photon excited fluorescence.

Second-order nonlinear-optical properties of donor- and acceptor-substituted aromatic compounds

1989 ◽  
Vol 6 (7) ◽  
pp. 1339 ◽  
Author(s):  
K. D. Singer ◽  
H. E. Katz ◽  
C. W. Dirk ◽  
J. E. Sohn ◽  
L. A. King ◽  
...  
Keyword(s):  
Optical Properties ◽  
Aromatic Compounds ◽  
Nonlinear Optical ◽  
Second Order ◽  
Nonlinear Optical Properties ◽  
Donor And Acceptor

scholarly journals Modulation of benzofuran structure as a fluorescent probe to optimize linear and nonlinear optical properties and biological activities

2020 ◽  
Vol 26 (10) ◽  
Author(s):  
Przemysław Krawczyk
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Nonlinear Response ◽  
Biological Activities ◽  
Aldehyde Group ◽  
Biological Imaging ◽  
Nonlinear Optical Properties ◽  
Donor And Acceptor ◽  
Structure Modulation ◽  
Linear And Nonlinear

Abstract The study presents the influence of structure modulation by introducing selected donor and acceptor substituents on optical properties of benzofuran used in biological imaging. As the starting form, 2-(5-formylbenzofuran-2-yl)acetamide described experimentally was used. This molecule contains an aldehyde group as reactive site, through which conjugation with protein occurs. Structure modulation was carried out by attaching additional electron-donating and electron-withdrawing substituents to the amino group, namely -NH2, -NHCH3, -NO2, -OH, and -OCH3. Studies have shown that the -NH2, -NHCH3, -OH, and -OCH3 substituents do not induce a significant change in the position of maximum absorption and fluorescence relative to each other. They also do not change the parameters describing the nonlinear response. Only the presence of the -NO2 substituent results in significant solvatochromic shifts. Changing substituents also does not significantly affect the LD50 value, and all tested fluorescent probes should not be considered toxic to humans. Modulation of the benzofuran derivative structure also does not change the active center in which the biocomplex with the protein is formed. In each case, the conjugation takes place via LYS114. In addition, the study was prompted to analyze the linear and nonlinear optical properties of conjugates formed after the reaction with Concanavalin A. Graphical abstract

Intermolecular Coupling Enhancement of the Molecular Hyperpolarizability in Multi-chromophoric Dipolar Dendrons

1999 ◽  
Vol 598 ◽  
Author(s):  
Shiyoshi Yokoyama ◽  
Akira Otomo ◽  
Shinro Mashiko
Keyword(s):  
Nonlinear Optical ◽  
Rayleigh Scattering ◽  
Second Harmonic ◽  
Second Order ◽  
Donor And Acceptor ◽  
Nonlinear Optical Chromophore ◽  
Scattering Technique ◽  
Molecular Hyperpolarizability ◽  
Azobenzene Chromophore ◽  
Electron Donor And Acceptor

ABSTRACTNonlinear optical dendritic macromolecules, called “azobenzene dendrons”, having a branching structure modified with a second-order nonlinear optical chromophore has been synthesized. An electron donor and acceptor azobenzene chromophore having a large molecular hyperpolarizability of β0=150E-30 esu, was chosen. The electronic structure of synthesized dendrons, which were expected to become dipolar due to their intermolecular attractive interaction, was proven by second-order nonlienar optical properties. The molecular hyperpolarizabilities of azobenzene dendrons were measured by the hypr-Rayleigh scattering technique. The highest molecular hyperpoalrizability was found to be 3,010E-30 esu for an azobenzene dendron having 15 chromophoric unit, where each chromophore coherently contribute to the second harmonic generation. This level of the molecular hyperpolarizability was much larger than that for a monomeric azobenzene chromophore.

Ultrafast third order nonlinear optical response of donor and acceptor codoped and compensated silicon quantum dots

2012 ◽  
Vol 101 (4) ◽  
pp. 041112 ◽  
Author(s):  
Kenji Imakita ◽  
Masahiko Ito ◽  
Ryo Naruiwa ◽  
Minoru Fujii ◽  
Shinji Hayashi
Keyword(s):  
Quantum Dots ◽  
Nonlinear Optical ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
Third Order ◽  
Silicon Quantum Dots ◽  
Donor And Acceptor

Large Nonlinear Optical Responses of Dimers Bearing a Donor and Acceptor: Long, Intradimer Multicenter Bonding

2014 ◽  
Vol 118 (49) ◽  
pp. 28746-28756 ◽  
Author(s):  
Wen-Yong Wang ◽  
Yu-He Kan ◽  
Li Wang ◽  
Shi-Ling Sun ◽  
Yong-Qing Qiu
Keyword(s):  
Nonlinear Optical ◽  
Optical Responses ◽  
Donor And Acceptor ◽  
Multicenter Bonding
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