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Size-tunable exciton chirality and fluorescence emission in (R)-(−)-2,2′-bis-(p-toluenesulfonyloxy)-1,1′-binaphthalene nanoparticles

Paper ID Volume ID Publish Year Pages File Format Full-Text
29121 44122 2006 5 PDF Available
Title
Size-tunable exciton chirality and fluorescence emission in (R)-(−)-2,2′-bis-(p-toluenesulfonyloxy)-1,1′-binaphthalene nanoparticles
Abstract

The organic nanoparticles from a chiral auxiliary, (R)-(−)-2,2′-bis-(p-toluenesulfonyloxy)-1,1′-binaphthalene (R-BTBN), were fabricated with a range of particle size from 40 to 160 nm through the reprecipitation method. The exciton chirality and the fluorescence emission of the particles display size-tunable behaviors. The circular dichroism (CD) spectra of the nanoparticles experience a bathochromic shift with an increase in the particle size and the intensity ratio of the first to the third cotton effect (CE) increases as the nanoparticle size increases to 60 nm. And also the nanoparticles show excimer emission that enhances as the particle size grows. CD spectra accompanied with UV, fluorescence emission spectra, reveal that the size-tunable optical properties are attributed to the synergetic effect of the change of dihedral angle in the initial stage and the more effective formation of excimer between the two naphthalene chromophores in adjacent molecules as nanoparticles grow.

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Keywords
Nanoparticle; Chirality; Circular dichroism; Excimer
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Size-tunable exciton chirality and fluorescence emission in (R)-(−)-2,2′-bis-(p-toluenesulfonyloxy)-1,1′-binaphthalene nanoparticles
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 181, Issue 1, 5 July 2006, Pages 94–98
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
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