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D-A-π-D Synthetic approach for thienyl chalcones – NLO – a structure activity study

Paper ID Volume ID Publish Year Pages File Format Full-Text
26052 43932 2016 7 PDF Available
Title
D-A-π-D Synthetic approach for thienyl chalcones – NLO – a structure activity study
Abstract

•Based on D-A-π-D SYNTHETIC APPROACH we could synthesize nine novel thienyl chalcones with high effective 3 photon absorption coefficient (3 PA) of order 10−28 m3/W2.•Of these, T-CHL-NDM was found to have the highest 3PA coefficient of about 105.0 × 10−28 m3/W2.•Structure activity relationship based on the functional group vis-à-vis its NLO properties was established, and making minor modifications in the structure of the chalcones, desired 3PA values could be obtained.•Structures of all compounds have been characterized adequately.•These compounds will be useful in various applications like optical devices, communications, etc.

With the growing interest for organic molecules in Nonlinear Optical (NLO) applications, we have synthesized nine novel thienyl chalcones based on the D-A-π-D design. In order to establish the identity, these have been characterized in detail. Having followed the design based synthetic route, we have focused on two prime criteria for comparison; namely second harmonic generation (SHG) and non-linear absorption. In this work the role of the electron withdrawing groups, electron donating groups and extended conjugation, have been extensively studied vis-à-vis the NLO properties. The change in these properties by virtue of the molecular structure has been elucidated in this work as the structure activity relationship. Optical nonlinearity is studied using ultrafast (100 fs) laser pulses at 800 nm, employing the open aperture Z-scan technique. The compounds exhibit large effective three-photon absorption (3PA) coefficients, in the order of 10−28 m3/W2. These observations show that these compounds possess potential for application in all-optical limiting and switching devices.

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Keywords
Thienyl chalcones; Z-Scan; Nonlinear optical properties (NLO); Three photon absorption; Second harmonic generation (SHG)
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 324, 30 June 2016, Pages 33–39
Authors
, , , , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us