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Characterization of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([Emim][Tf2N])/TX-100/cyclohexane ternary microemulsion: Investigation of photoinduced electron transfer in this RTIL containing microemulsion
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10.1063/1.3548834
/content/aip/journal/jcp/134/7/10.1063/1.3548834
http://aip.metastore.ingenta.com/content/aip/journal/jcp/134/7/10.1063/1.3548834

Figures

Image of Scheme 1.
Scheme 1.

Structure of the Coumarin dyes, dimethyl aniline, the RTIL, and TX-100.

Image of FIG. 1.
FIG. 1.

Phase diagram of [Emim][Tf2N]/TX-100/cyclohexane microemulsion (in weight fraction) at 25 °C.

Image of FIG. 2.
FIG. 2.

Electrical conductivity of [Emim][Tf2N]/TX-100/cyclohexane microemulsion as a function of cyclohexane weight fraction at (a) R = 0.14 and (b) R = 0.50.

Image of FIG. 3.
FIG. 3.

Size distribution of the droplets (measured by dynamic light scattering) in [Emim][Tf2N]/TX-100/cyclohexane microemulsion at (a) R = 0.01 and (b) R = 0.14.

Image of FIG. 4.
FIG. 4.

Dependence of the droplet radius (R c ) on R value for the [Emim][Tf2N]/TX-100/cyclohexane microemulsion at 25 °C.

Image of FIG. 5.
FIG. 5.

(a) Absorption spectra of (i) C-153 in neat [Emim][Tf2N], (ii) C-153 at R = 0.01 (iii) C-153 in cyclohexane, and (iv) neat [Emim][Tf2N]/TX-100/cyclohexane microemulsion (b) Normalized emission spectra of C-153 in (i) [Emim][Tf2N]/TX-100/cyclohexane microemulsion at (i) R = 0.01, (ii) R = 0.14, (iii) neat IL [Emim][Tf2N], and (iv) cyclohexane.

Image of FIG. 6.
FIG. 6.

(a) Steady state fluorescence quenching spectra in [Emim][Tf2N]/TX-100/cyclohexane microemulsion with increasing total DMA concentration of C-151 at R = 0.14 and (b) Time resolved fluorescence decays in [Emim][Tf2N]/TX-100/cyclohexane microemulsion with increasing total DMA concentration of C-151 at R = 0.14.

Image of FIG. 7.
FIG. 7.

Stern–Volmer plots of Coumarin dyes in [Emim][Tf2N]//TX-100/cyclohexane microemulsion at (a) R = 0.01 and (b) R = 0.14 at λ ex = 440 nm for C-522 (red solid square, ▪), C-151 (blue solid circle, ●), C-152A (○), C-153 (pink diamond, ◊), and C-152 (green solid triangle, ▲).

Image of FIG. 8.
FIG. 8.

Decay of fluorescence anisotropy r(t) of C-151 (dark green solid triangle, ▲) and its analogue C152 (○) and C152A (red solid square, ▪) at (a) R = 0.01 and (b) R = 0.14 (λ ex = 440 nm).

Image of FIG. 9.
FIG. 9.

lnk q vs ΔG 0 plot of all the Coumarin dyes at (a) R = 0.01 and (b) R = 0.14 at λ ex = 440 nm.

Image of FIG. 10.
FIG. 10.

The plot of D L vs ΔG 0 for different probe at R = 0.01 excited at 440 nm.

Tables

Generic image for table
Table I.

The absorption and emission maxima of different Coumarin dyes in [Emim][Tf2N]/TX-100/cyclohexane microemulsions at different R value (R = [Emim][Tf2N]/TX-100) and the absorption maxima of different Coumarin dyes in cyclohexane.

Generic image for table
Table II.

Lifetime, quenching constants for different Coumarin–amine systems studied in [Emim][Tf2N]/TX-100/cyclohexane microemulsions at different R values at λex = 440 nm.a

Generic image for table
Table III.

Initial anisotropy values (r0) and rotational relaxation time (τr) of Coumarin dyes in [Emim][Tf2N]/TX-100/cyclohexane microemulsions at different R values at λex = 440 nm.

Generic image for table
Table IV.

Redox potential values, E00 values, and ΔG0 values for different Coumarin–amine systems studied in [Emim][Tf2N]/TX-100/cyclohexane microemulsions at different R values at λex = 440 nm.a

Generic image for table
Table V.

Analytical parameters obtained from the anisotropy decays of the Coumarin dyes in [Emim][Tf2N]/TX-100/cyclohexane microemulsions at different R values at λ ex = 440 nm.

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/content/aip/journal/jcp/134/7/10.1063/1.3548834
2011-02-18
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Characterization of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([Emim][Tf2N])/TX-100/cyclohexane ternary microemulsion: Investigation of photoinduced electron transfer in this RTIL containing microemulsion
http://aip.metastore.ingenta.com/content/aip/journal/jcp/134/7/10.1063/1.3548834
10.1063/1.3548834
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