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Enhancement of two photon absorption properties by charge transfer in newly synthesized aza-boron-dipyrromethene compounds containing triphenylamine, 4-ethynyl-N,N-dimethylaniline and methoxy moieties

Paper ID Volume ID Publish Year Pages File Format Full-Text
27171 44006 2013 6 PDF Available
Title
Enhancement of two photon absorption properties by charge transfer in newly synthesized aza-boron-dipyrromethene compounds containing triphenylamine, 4-ethynyl-N,N-dimethylaniline and methoxy moieties
Abstract

The effects of substitution and charge transfer on linear and nonlinear optical absorption (especially two photon absorption) properties of aza-BODIPY containing triphenylamine, 4-ethynyl-N,N-dimethylaniline and methoxy moieties were investigated by ultrafast pump probe spectroscopy technique. Fluorescence and ultrafast pump probe spectroscopy experiments revealed that aza-BODIPY compounds with good electron donating moieties (triphenylamine and 4-ethynyl-N,N-dimethylaniline moieties) have charge transfer from electron donating parts of the molecules to aza-BODIPY core. The two photon absorption cross sections increase with the electron donating strength. Maximum two photon absorption cross section is obtained as 126 GM at telecommunication wavelength (1310 nm) for aza-BODIPY compound containing triphenylamine, 4-ethynyl-N,N-dimethylaniline. Our results indicate that charge transfer enhances two photon absorption properties.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Linear and nonlinear optical absorptions of aza-BODIPY were investigated. ► Charge transfer occurs from electron donating parts of the molecules to aza-BODIPY core. ► Charge transfer enhances two photon absorption properties. ► Compounds show TPA cross sections are 25, 37 and 83 GM at 1200 nm. ► TPA cross section property increase with the increasing electron donor strength.

Keywords
Aza-BODIPY; Charge transfer; Fluorescence; Ultrafast pump probe spectroscopy technique; Two-photon absorption
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Enhancement of two photon absorption properties by charge transfer in newly synthesized aza-boron-dipyrromethene compounds containing triphenylamine, 4-ethynyl-N,N-dimethylaniline and methoxy moieties
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 256, 15 March 2013, Pages 23–28
Authors
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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