Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/2258
Title: Optical transition rates of a meso-substituted thiacarbocyanine in methanol-in-oil reverse micelles
Authors: Özçelik, Serdar
Atay, N. Zeynep
Keywords: Micelles
Cyanine dyes
Enhanced fluorescence
Methanol-in-oil-droplet
Spatial confinement
Issue Date: May-2005
Publisher: Elsevier Ltd.
Source: Özçelik, S., and Atay, N. Z. (2005). Optical transition rates of a meso-substituted thiacarbocyanine in methanol-in-oil reverse micelles. Journal of Luminescence, 113(1-2), 1-8. doi:10.1016/j.jlumin.2004.07.009
Abstract: We report the photophysical properties of 3,3′-diethyl-5,5′-dichloro-9-phenylthiacarbocyanine (DDPT) in methanol-in-oil (m/o) reverse micellar systems which form methanol droplets stabilized with anionic surfactant aerosol-OT (AOT) in n-heptane. The fluorescence quantum yield of DDPT is enhanced by a factor of 17 in the methanol droplet in comparison with bulk methanol. The fluorescence lifetimes of DDPT in m/o reverse micelles are prolonged up to 2.2 ns with increasing molar ratio of methanol to surfactant (w0=[MeOH]/[AOT]), whereas the fluorescence lifetime of DDPT in bulk methanol is 75 ps. The non-radiative rate constants of DDPT in the droplets are decreased by a factor of 40, resulting in a remarkable enhancement in quantum yields, indicating that internal motions of DDPT in the droplets are significantly reduced due to strong electrostatic interactions between the positively charged DDPT and the negatively charged sulfonate head-groups of AOT and the spatial confinement induced by the reverse micellar structure.
URI: http://doi.org/10.1016/j.jlumin.2004.07.009
http://hdl.handle.net/11147/2258
ISSN: 0022-2313
Appears in Collections:Chemistry / Kimya
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Files in This Item:
File Description SizeFormat 
2258.pdfMakale412.9 kBAdobe PDFThumbnail
View/Open
Show full item record

CORE Recommender

SCOPUSTM   
Citations

6
checked on Aug 10, 2022

WEB OF SCIENCETM
Citations

8
checked on Jun 21, 2022

Page view(s)

88
checked on Aug 8, 2022

Download(s)

84
checked on Aug 8, 2022

Google ScholarTM

Check

Altmetric


Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.