Abstract
A highly selective recognition system for zinc(II) and pyrophosphate ions is constructed using a single conical nanochannel covalently functionalized with N'-(4-[(2,2':6',2''-terpyridine)-4-yl]benzyl)ethane-1,2-diamine (TPYD). The immobilized TPYD acts as a specific coordination site for Zn2+ to form TPYD-Zn2+ complexes in preference over other metal ions, and subsequently, the resulting Zn2+-coordinated nanochannel can be used as a selective recognition element for the pyrophosphate ion based on the coordination reaction between hydroxyl oxygen atoms of pyrophosphate and Zn2+. Ion recognition is monitored by measuring the current-voltage curves of the solutions. The ionic current of the TPYD-functionalized system at -2.0V undergoes a clear decrease after exposure to Zn2+ ions and is followed with an obvious increase after subsequent treatment with a pyrophosphate solution. The change of ionic current can be primarily attributed to the variation of charge density of the nanochannel. This functionalized single nanochannel might provide a simple and universal means to recognize other targets by modifying different functional molecules onto the inner surfaces of nanochannels.
| Original language | English |
|---|---|
| Pages (from-to) | 253-259 |
| Number of pages | 7 |
| Journal | ChemPhysChem |
| Volume | 18 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 18 Jan 2017 |
| Externally published | Yes |
Keywords
- Asymmetric nanochannels
- Chemical functionalization
- Pyrophosphate
- Recognition
- Zinc
Cite this
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Sequential recognition of zinc and pyrophosphate ions in a terpyridine-functionalized single nanochannel. / Zhang, Yuqi; Zhou, Ru; Zhao, Zhiju; Kong, Xiang-Yu; Xie, Ganhua; Liu, Qian; Li, Pei; Zhang, Zhen; Xiao, Kai; Liu, Zhengping; Wen, Liping; Jiang, Lei.
In: ChemPhysChem, Vol. 18, No. 2, 18.01.2017, p. 253-259.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Sequential recognition of zinc and pyrophosphate ions in a terpyridine-functionalized single nanochannel
AU - Zhang, Yuqi
AU - Zhou, Ru
AU - Zhao, Zhiju
AU - Kong, Xiang-Yu
AU - Xie, Ganhua
AU - Liu, Qian
AU - Li, Pei
AU - Zhang, Zhen
AU - Xiao, Kai
AU - Liu, Zhengping
AU - Wen, Liping
AU - Jiang, Lei
PY - 2017/1/18
Y1 - 2017/1/18
N2 - A highly selective recognition system for zinc(II) and pyrophosphate ions is constructed using a single conical nanochannel covalently functionalized with N'-(4-[(2,2':6',2''-terpyridine)-4-yl]benzyl)ethane-1,2-diamine (TPYD). The immobilized TPYD acts as a specific coordination site for Zn2+ to form TPYD-Zn2+ complexes in preference over other metal ions, and subsequently, the resulting Zn2+-coordinated nanochannel can be used as a selective recognition element for the pyrophosphate ion based on the coordination reaction between hydroxyl oxygen atoms of pyrophosphate and Zn2+. Ion recognition is monitored by measuring the current-voltage curves of the solutions. The ionic current of the TPYD-functionalized system at -2.0V undergoes a clear decrease after exposure to Zn2+ ions and is followed with an obvious increase after subsequent treatment with a pyrophosphate solution. The change of ionic current can be primarily attributed to the variation of charge density of the nanochannel. This functionalized single nanochannel might provide a simple and universal means to recognize other targets by modifying different functional molecules onto the inner surfaces of nanochannels.
AB - A highly selective recognition system for zinc(II) and pyrophosphate ions is constructed using a single conical nanochannel covalently functionalized with N'-(4-[(2,2':6',2''-terpyridine)-4-yl]benzyl)ethane-1,2-diamine (TPYD). The immobilized TPYD acts as a specific coordination site for Zn2+ to form TPYD-Zn2+ complexes in preference over other metal ions, and subsequently, the resulting Zn2+-coordinated nanochannel can be used as a selective recognition element for the pyrophosphate ion based on the coordination reaction between hydroxyl oxygen atoms of pyrophosphate and Zn2+. Ion recognition is monitored by measuring the current-voltage curves of the solutions. The ionic current of the TPYD-functionalized system at -2.0V undergoes a clear decrease after exposure to Zn2+ ions and is followed with an obvious increase after subsequent treatment with a pyrophosphate solution. The change of ionic current can be primarily attributed to the variation of charge density of the nanochannel. This functionalized single nanochannel might provide a simple and universal means to recognize other targets by modifying different functional molecules onto the inner surfaces of nanochannels.
KW - Asymmetric nanochannels
KW - Chemical functionalization
KW - Pyrophosphate
KW - Recognition
KW - Zinc
UR - http://www.scopus.com/inward/record.url?scp=85007188142&partnerID=8YFLogxK
U2 - 10.1002/cphc.201600923
DO - 10.1002/cphc.201600923
M3 - Article
C2 - 27897377
AN - SCOPUS:85007188142
VL - 18
SP - 253
EP - 259
JO - ChemPhysChem
JF - ChemPhysChem
SN - 1439-4235
IS - 2
ER -