supporting information · 2015-02-18 · supporting information diphenylether based derivatives as...
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Supporting information
Diphenylether based derivatives as Fe (III) chemosensors:Spectrofluorimetry, Electrochemical and Theoretical studies
Rashmi Sharma, Manmohan Chhibber*, Susheel K MittalThapar University, Patiala.
Table S1 Comparison of chemosensors used for detection of Fe3+ by various techniques
Table S2 Binding energies between DPE molecules and Fe3+
Figure S1 (a) 1H NMR spectra of DPE-I.
Figure S1 (b) 13C NMR spectra of DPE-I.
Figure S2 (a) 1H NMR spectra of DPE-II.
Figure S1 (b) 13C NMR spectra of DPE-II.
Figure S3 UV-Visible absorption spectra of (A) DPE-I (20 µM) and (B) DPE-II (20 µM)
upon addition of a particular metal salt in HEPES buffered ACN/H2O (9:1, v/v)
solvent system.
Figure S4 Ratiometric behavior of DPE-I and DPE-II in presence of various Fe3+ ions conc.
in HEPES buffered ACN/H2O (9:1, v/v) solvent system.
Figure S5 CV and DPV graphs of DPE-I and DPE-II with increase in scan rate in HEPES
buffered ACN/H2O (9:1, v/v) solvent system.
Figure S6 CV and DPV graphs of DPE-I and DPE-II with various concentrations of active
species in HEPES buffered ACN/H2O (9:1, v/v) solvent system.
Figure S7 CV and DPV graphs of DPE-I and DPE-II with different solvent systems.
Electronic Supplementary Material (ESI) for RSC Advances.This journal is © The Royal Society of Chemistry 2015
Table S1: Comparison of chemosensors used for detection of Fe3+ by various techniques
S. No. Receptors Technique used Interference Linear range Reference
12-amino-6-methyl-4-phenyl-nicotinonitrile
Fluorescence Hg2+ 2×10-4 to 7×10-4M 42
2 Aminobisulfonate receptor Fluorescence Cu2+ 16×10−6 to
63×10−6 M 7
3 Diphenylfluorenes UV, Fluorescence Co2+ 1×10−6 to
8×10−6 M 3
4Dimethyliminocinnamyl linked rhodamine
Voltammetry NA 1.0×10−1 to 1.0×10−5M 43
5 Terpyridine based UV,Colorimetry Ag+ 2.0×10−5 to
8.0×10−5M 44
6 Proposed chemosensor
UV, Fluorescence,
CV, DPV
No interference
1×10−6 to2.5×10−6 M
Present work
Table S2 Binding energies between DPE molecules and Fe3+
Receptor Energy in a.u
DPE-I -1175
DPE-I+Fe3+ -1298
DPE-II -1177
DPE-II+Fe3+ -1299
OCH3
OHC
ONO2
NO2
Figure S1 (a) 1H NMR spectra of DPE-I.
OCH3
OHC
ONO2
NO2
Figure S1 (b) 13C NMR spectra of DPE-I.
OCH3
HOH2C
ONO2
NO2
Figure S2 (a) 1H NMR spectra of DPE-II.
OCH3
HOH2C
ONO2
NO2
Figure S1 (b) 13C NMR spectra of DPE-II.
200 300 400 500 600 700 8000.0
0.5
1.0
1.5Ab
sorb
ance
Wavelength(nm)
Ligand Na2+
K+
Ni2+
Cu2+
Hg2+
Co2+
Zn2+
Ba2+
Fe3+
200 300 400 500 600 700 800
0.0
0.5
1.0
1.5
2.0
Abso
rban
ce
Wavelength(nm)
Ligand Ba2+
Pb2+
K+
Fe2+
Cu2+
Co2+
Ni2+
Hg2+
Na2+
Zn2+
Figure S3 UV-Visible absorption spectra of (a) DPE-I (20 µM) and (b) DPE-II (20 µM) upon addition of a particular metal salt in HEPES buffered ACN/H2O (9:1, v/v) solvent system.
(a)
(b)
0 2 4 6 8 10
0
200
400
600
800
1000F.
I. (a
.u)
Conc. of Fe3+ (1 × 10-4 M)
0 1 2 3 4 5 6
0
5
10
15
20
25
I 424/I 31
4 (a.u
.)
Conc. of Fe3+(1 × 10-4
R2 =0.998
Figure S4 Ratiometric behavior of (a) DPE-I (b) DPE-II in presence of various Fe3+ ions conc. in HEPES buffered ACN/H2O (9:1, v/v) solvent system.
(a)
(b)
Figure S5 CV and DPV graphs of DPE-I and DPE-II with increase in scan rate in HEPES buffered ACN/H2O (9:1, v/v) solvent system.
Figure S6 CV and DPV graphs of DPE-I and DPE-II with various concentrations of active species in HEPES buffered ACN/H2O (9:1, v/v) solvent system.
Figure S7 CV and DPV graphs of DPE-I and DPE-II with different solvent systems.