In:
ChemPhysChem, Wiley, Vol. 18, No. 2 ( 2017-01-18), p. 253-259
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 Zn 2+ to form TPYD–Zn 2+ complexes in preference over other metal ions, and subsequently, the resulting Zn 2+ ‐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 Zn 2+ . Ion recognition is monitored by measuring the current–voltage curves of the solutions. The ionic current of the TPYD‐functionalized system at −2.0 V undergoes a clear decrease after exposure to Zn 2+ 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.
Type of Medium:
Online Resource
ISSN:
1439-4235
,
1439-7641
DOI:
10.1002/cphc.201600923
Language:
English
Publisher:
Wiley
Publication Date:
2017
detail.hit.zdb_id:
2025223-7
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