ꢀꢀꢀꢀꢁꢀQ. Zhang and K. Duan: Fluorescence chemosensor for K and Ba2+ꢁ ions
+ꢁ
4
and the filtrate was concentrated. The residue was washed with water
[3] Gupta, V. K.; Jain, A. K.; Kumar, P.; Agarwal, S.; Maheshwari, G.
Chromium(III) – selective sensor based on tri-o-thymotide in
PVC matrix. Sens. Actuators B 2006, 113, 182–186.
and crystallized from ethanol to give colorless flakes; yield 93%; mp
1
9
8.4–99.5°C; H NMR (CDCl ): δ 1.33 (t, 3H, Jꢀ=ꢀ7.0 Hz), 2.43 (s, 3H), 4.29
3
(
q, 2H, Jꢀ=ꢀ7.0 Hz), 4.71 (s, 2H), 6.19 (s, 1H), 6.81 (d, 1H, Jꢀ=ꢀ2.5 Hz), 6.93
dd, 1H, J ꢀ=ꢀ8.5 Hz, J ꢀ=ꢀ2.5 Hz), 7.56 (d, 1H, Jꢀ=ꢀ8.5 Hz). Anal. Calcd for
C H O : C, 64.12; H, 5.38. Found: C, 64.17; H, 5.28.
[4] Jain, A. K.; Gupta, V. K.; Singh, L. P.; Raisoni, J. R. A comparative
2
+
(
study of Pb selective sensors based on derivatized tetrapyra-
1
2
zole and calix[4]arene receptors. Electrochim. Acta 2006, 51,
14
14
5
2
547–2553.
[
[
5] Gupta, V. K.; Mergu, N.; Singh, A. K. Fluorescent chemosensors
2
+
Coumarin derivative 6
for Zn ions based on flavonol derivatives. Sens. Actuators B
014, 202, 674–682.
2
6] Gupta, V. K.; Mangla, R.; Khurana, U.; Kumar, P. Determina-
tion of uranyl ions using poly(vinylchloride) based 4-tert-
butylcalix[6]arene membrane sensor. Electroanalysis 1999, 11,
A solution of compound 5 (524 mg, 2 mmol) in ethanol (4 mL) was
stirred and treated dropwise for 15 min with hydrazine hydrate (80%,
0
.17 mL, 2.7 mmol) and then the mixture was heated under reflux
5
73–576.
for an additional 3 h. The resultant white precipitate was filtered,
[
[
[
7] Khani, H.; Rofouei, K.; Arab, P.; Gupta, V. K.; Vafaei, Z. Multi-
walled carbon nanotubes-ionic liquid-carbon paste electrode as
a super selectivity sensor: application to potentiometric moni-
toring of mercury ion(II). J. Hazard. Mater. 2010, 183, 402–409.
8] Jain, A. K.; Gupta, V. K.; Khurana, U.; Singh, L. P. A new
crystallized from methanol and dried in vacuo; yield 59%; mp 201.4–
1
2
03.0°C; H NMR (DMSO-d ): δ 2.40 (s, 3H), 4.35 (m, 2H), 4.62 (s, 2H),
6
6
.23 (s, 1H), 6.97 (d, 1H, Jꢀ=ꢀ2.5 Hz), 7.01 (dd, 1H, J ꢀ=ꢀ8.5 Hz, J ꢀ=ꢀ2.5 Hz),
1
2
7.70 (d, 1H, Jꢀ=ꢀ8.5 Hz), 9.43 (s, 1H). Anal. Calcd for C H N O : C, 58.06;
12
12
2
4
H, 4.87; N, 11.29. Found: C, 58.17; H, 4.78; N, 11.19.
2
+
membrane sensor for UO2 ions based on 2-hydroxyacetophe-
noneoxime-thiourea-trioxane resin. Electroanalysis 1997, 9,
857–860.
Sensor 1
9] Gupta, V. K.; Jain, A. K.; Singh, L. P.; Khurana, U. Porphyrins
as carrier in PVC based membrane potentiometric sensors for
nickel(II). Anal. Chim. Acta 1997, 355, 33–41.
A solution of compound 6 (212 mg, 0.85 mmol) in absolute ethanol
23 mL) under a nitrogen atmosphere was stirred and treated drop-
wise for 30 min with a solution of aza-15-crown-5 derivative 3 (276 mg,
.85 mmol) in absolute ethanol (23 mL) and then with two drops of
(
[
10] Prasad, R.; Gupta, V. K.; Kumar, A. Metallo-tetraazaporphyrin
based anion sensors: regulation of sensor characteristics
through central metal ion coordination. Anal. Chim. Acta 2004,
0
glacial acetic acid. Upon stirring, the mixture was heated under reflux
for 6 h. The resultant white precipitate was filtered, crystallized from
5
08, 61–70.
[
[
11] Gupta, V. K.; Singh, A. K.; Khayat, M. A.; Gupta, B. Neutral car-
riers based polymeric membrane electrodes for selective deter-
mination of mercury (II). Anal. Chim. Acta 2007, 590, 81–90.
12] Jain, A. K.; Gupta, V. K.; Singh, L. P.; Khurana, U. Macrocycle
based membrane sensors for the determination of cobalt(II)
ions. Analyst 1997, 122, 583–586.
n-heptane and dried in vacuo: white needles; yield 70%; mp 177.1–
1
1
78°C; H NMR (DMSO-d ): δ 2.41 (s, 3H), 3.51–3.56 (m, 16H), 3.64–3.66
6
(
m, 4H), 4.76 and 5.24 (2s, 2H), 6.22–6.25 (m, 1H), 6.68–6.71 (m, 2H),
6
.95–7.06 (m, 2H), 7.48–7.51 (m, 2H), 7.69–7.75 (m, 1H), 7.87 and 8.15 (2s,
+
1
H), 11.32 and 11.38 (2s, 1H); ESI-MS: m/z 576.30 (Mꢀ+ꢀNa ). Anal. Calcd
for C H N O : C, 62.92; H, 6.37; N, 7.59. Found: C, 62.68; H, 6.30; N, 7.43.
29
35
3
8
[13] Gupta, V. K.; Singh, L. P.; Singh, R.; Upadhyay, N.; Kaur, S. P.;
Sethi, B. A novel copper(II) selective sensor based on Dimethyl
4
, 4′-(o-phenylene) bis(3-thioallophanate) in PVC matrix. J. Mol.
Liq. 2012, 174, 11–16.
Supporting information
Supplementary data for this article can be found in the
online version.
[14] Gupta, V. K.; Ganjali, M. R.; Norouzi, P.; Khani, H.; Nayak, A.;
Agarwal, S. Electrochemical analysis of some toxic metals
by ion-selective electrodes. Crit. Rev. Anal. Chem. 2011, 41,
2
82–313.
[
15] Gupta, V. K.; Nayak, A.; Agarwal, S.; Singhal, B. Recent
advances on potentiometric membrane sensors for pharmaceu-
tical analysis. Comb. Chem. High T. Scr. 2011, 14, 284–302.
Acknowledgments: This work was supported by the
Natural Science Foundation Project of Inner Mongolia [16] Gupta, V. K.; Jain, A. K.; Maheshwari, G. Aluminum(III) selective
potentiometric sensor based on morin in poly(vinyl chloride)
matrix. Talanta 2007, 72, 1469–1473.
17] Gupta, V. K.; Karimi-Maleh, H.; Sadegh, R. Simultaneous deter-
mination of hydroxylamine, phenol and sulfite in water and
waste water samples using a voltammetric nanosensor. Int. J.
Electrochem. Sci. 2015, 10, 303–316.
(2013MS0219).
[
References
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1] Gupta, V. K.; Mergua, N.; Kumawata, L. K.; Singh, A. K. Selective
naked-eye detection of Magnesium (II) ions using a coumarin-
derived fluorescent probe. Sens. Actuators B 2015, 207,
[18] Goyal, R. N.; Gupta, V. K.; Bachheti, N. Fullerene-C60-modified
electrode as a sensitive voltammetric sensor for detection of
nandrolone-An anabolic steroid used in doping. Anal. Chim.
Acta 2007, 597, 82–89.
[19] Srivastava, S. K.; Gupta, V. K.; Jain, S. PVC-based
2,2,2-cryptand sensor for zinc ions. Anal. Chem. 1996, 68,
1272–1275.
2
16–223.
[2] Gupta, V. K.; Jain, A. K.; Agarwal, S.; Maheshwari, G. An iron (III)
ion-selective sensor based on a bis(tridentate) ligand. Talanta
2007, 71, 1964–1968.
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