SUPPLEMENTARY INFORMATION
A fluorescent sensor based on binaphthol-quinoline Schiff base for relay recognition of
Zn2+ and oxalate in aqueous media
LIJUN TANG, DI WU, ZHENLONG HUANG, YANJIANG BIAN
Department of Chemistry, Bohai University, Jinzhou 121013, China
e-mail: [email protected]
Table of Contents
Figure S1. 1H NMR spectrum of L1 in DMSO-d6. ························································· S2
Figure S2. 1H NMR spectrum of control compound L2 in DMSO-d6. ······························ S3
Figure S3. Fluorescence responses of sensor L1 (10 μM) and control compound L2 (10 μM)
to Zn2+.······················································································································· S3
Figure S4. Job’s plot for evaluating the binding ratio of Zn2+ and L1 with a total
concentration of 20 μM. ····························································································· S4
Figure S5. UV-vis absorption spectrum changes of L1 in the presence of different
concentrations of Zn2+. CL1 = 40 μM. ············································································S4
Figure S6. Normalized fluorescence intensity of the ensemble solution (10 μM) to
Log[oxalate]. ·············································································································· S4
S1
Supplementary figures (Figure S1-S6)
Figure S1. 1H NMR spectrum of L1 in DMSO-d6.
S2
Figure S2. 1H NMR spectrum of control compound L2 in DMSO-d6.
1000
2+
Fluorescence Intensity (a.u.)
L1+Zn
800
600
400
200
2+
L2, L2+Zn
0
400
450
500
550
600
650
700
Wavelength (nm)
Figure S3. Fluorescence responses of sensor L1 (10 μM) and control compound L2 (10 μM)
to Zn2+.
S3
Fluorescence Intensity (a.u.)
800
600
400
200
0
0.0
0.2
0.4
2+
0.6
0.8
1.0
2+
[Zn ]/[Zn ]+[L1]
Figure S4. Job’s plot for evaluating the binding ratio of Zn2+ and L1 with a total
concentration of 20 μM.
0.5
Aborbance
0.4
0.3
10 equiv.
Zn2+
0.2
0
0.1
0.0
350
400
450
500
Wavelength (nm)
Figure S5. UV-vis absorption spectrum changes of L1 in the presence of different
concentrations of Zn2+. CL1 = 40 μM.
0.95
0.90
Y=2.53+0.54X
R=0.998
[(Imax-I)/(Imax-Imin)]
0.85
0.80
0.75
0.70
0.65
0.60
-3.5
-3.4
-3.3
-3.2
-3.1
-3.0
Log[oxalate]
Figure S6. Normalized fluorescence intensity of the ensemble solution (10 μM) to
Log[oxalate].
S4