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Issue 3, 2017
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Replacement of quinolines with isoquinolines affords target metal ion switching from Zn2+ to Cd2+ in the fluorescent sensor TQLN (N,N,N′,N′-tetrakis(2-quinolylmethyl)-2,6-bis(aminomethyl)pyridine)

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Abstract

A quinoline-based heptadentate ligand, N,N,N′,N′-tetrakis(2-quinolylmethyl)-2,6-bis(aminomethyl)pyridine (TQLN), exhibits a Zn2+-specific fluorescence increase at 428 nm, which is assigned to excimer emission (IZn/I0 = 38, ICd/IZn = 24%, ϕZn = 0.069). In contrast, the isoquinoline counterpart 1-isoTQLN exhibits a Cd2+-specific fluorescence increase at 365 nm attributable to monomer emission (ICd/I0 = 83, IZn/ICd = 19%, ϕCd = 0.015).

Graphical abstract: Replacement of quinolines with isoquinolines affords target metal ion switching from Zn2+ to Cd2+ in the fluorescent sensor TQLN (N,N,N′,N′-tetrakis(2-quinolylmethyl)-2,6-bis(aminomethyl)pyridine)

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Publication details

The article was received on 13 Oct 2016, accepted on 08 Dec 2016 and first published on 08 Dec 2016


Article type: Communication
DOI: 10.1039/C6DT03948K
Citation: Dalton Trans., 2017,46, 632-637

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    Replacement of quinolines with isoquinolines affords target metal ion switching from Zn2+ to Cd2+ in the fluorescent sensor TQLN (N,N,N′,N′-tetrakis(2-quinolylmethyl)-2,6-bis(aminomethyl)pyridine)

    Y. Mikata, A. Takekoshi, M. Kaneda, H. Konno, K. Yasuda, M. Aoyama and S. Tamotsu, Dalton Trans., 2017, 46, 632
    DOI: 10.1039/C6DT03948K

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