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Title: Photochemistry of squaraine dyes. 8. Photophysical properties of crown ether squaraine fluoroionophores and their metal ion complexes

Abstract

The photophysical properties of a series of red-sensitive, highly fluorescent bis[4-(monoaza-crown ether)-phenyl]squaraine fluoroionophores are reported. These dyes are soluble in both polar and nonpolar solvents with fluorescence quantum yield varying from 0.01 to 0.85. These dyes readily form aggregates in aqueous solutions. These aggregates dissociate in [beta]-cyclodextrin solutions as the dye molecules form 1:1 complex with [beta]-cyclodextrin. This complexation process is accompanied by a significant enhancement in the fluorescence yields of these dyes. Complexation of the fluoroionophores with alkali-metal ions brings about drastic reductions in their fluorescence quantum yield as well as significant changes in their redox properties. 35 refs., 9 figs., 3 tabs.

Authors:
; ;  [1];  [2];  [3]
  1. Regional Research Lab., Trivandrum (India)
  2. Univ. of Notre Dame, IN (United States)
  3. Regional Research Lab., Trivandrum (India) Univ. of Notre Dame, IN (United States) Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore (India)
Publication Date:
OSTI Identifier:
6835218
Resource Type:
Journal Article
Journal Name:
Journal of Physical Chemistry; (United States)
Additional Journal Information:
Journal Volume: 98:37; Journal ID: ISSN 0022-3654
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; COMPLEXES; FLUORESCENCE; INFRARED SPECTRA; MASS SPECTROSCOPY; NUCLEAR MAGNETIC RESONANCE; REDOX REACTIONS; DYES; ALKALI METAL COMPOUNDS; COMPILED DATA; CROWN ETHERS; DEXTRIN; MATHEMATICAL MODELS; PHOTOLYSIS; CARBOHYDRATES; CHEMICAL REACTIONS; DATA; DECOMPOSITION; ETHERS; INFORMATION; LUMINESCENCE; MAGNETIC RESONANCE; NUMERICAL DATA; ORGANIC COMPOUNDS; ORGANIC OXYGEN COMPOUNDS; PHOTOCHEMICAL REACTIONS; POLYSACCHARIDES; RESONANCE; SACCHARIDES; SPECTRA; SPECTROSCOPY; 400201* - Chemical & Physicochemical Properties; 400500 - Photochemistry; 400102 - Chemical & Spectral Procedures; 990200 - Mathematics & Computers

Citation Formats

Das, S, Thomas, K G, Thomas, K J, Kamat, P V, and George, M V. Photochemistry of squaraine dyes. 8. Photophysical properties of crown ether squaraine fluoroionophores and their metal ion complexes. United States: N. p., 1994. Web. doi:10.1021/j100088a033.
Das, S, Thomas, K G, Thomas, K J, Kamat, P V, & George, M V. Photochemistry of squaraine dyes. 8. Photophysical properties of crown ether squaraine fluoroionophores and their metal ion complexes. United States. https://doi.org/10.1021/j100088a033
Das, S, Thomas, K G, Thomas, K J, Kamat, P V, and George, M V. 1994. "Photochemistry of squaraine dyes. 8. Photophysical properties of crown ether squaraine fluoroionophores and their metal ion complexes". United States. https://doi.org/10.1021/j100088a033.
@article{osti_6835218,
title = {Photochemistry of squaraine dyes. 8. Photophysical properties of crown ether squaraine fluoroionophores and their metal ion complexes},
author = {Das, S and Thomas, K G and Thomas, K J and Kamat, P V and George, M V},
abstractNote = {The photophysical properties of a series of red-sensitive, highly fluorescent bis[4-(monoaza-crown ether)-phenyl]squaraine fluoroionophores are reported. These dyes are soluble in both polar and nonpolar solvents with fluorescence quantum yield varying from 0.01 to 0.85. These dyes readily form aggregates in aqueous solutions. These aggregates dissociate in [beta]-cyclodextrin solutions as the dye molecules form 1:1 complex with [beta]-cyclodextrin. This complexation process is accompanied by a significant enhancement in the fluorescence yields of these dyes. Complexation of the fluoroionophores with alkali-metal ions brings about drastic reductions in their fluorescence quantum yield as well as significant changes in their redox properties. 35 refs., 9 figs., 3 tabs.},
doi = {10.1021/j100088a033},
url = {https://www.osti.gov/biblio/6835218}, journal = {Journal of Physical Chemistry; (United States)},
issn = {0022-3654},
number = ,
volume = 98:37,
place = {United States},
year = {Thu Sep 15 00:00:00 EDT 1994},
month = {Thu Sep 15 00:00:00 EDT 1994}
}