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)

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)

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 counterp...

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Veröffentlicht in:Dalton transactions : an international journal of inorganic chemistry 2017-01, Vol.46 (3), p.632-637
Hauptverfasser: Mikata, Yuji, Takekoshi, Ayaka, Kaneda, Minori, Konno, Hideo, Yasuda, Keiko, Aoyama, Masato, Tamotsu, Satoshi
Format: Artikel
Sprache:eng
Schlagworte:
Emission
Excimers
Fluorescence
Ligands
Monomers
Organic compounds
Sensors
Switching
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Zusammenfassung: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).
ISSN:1477-9226
1477-9234
DOI:10.1039/c6dt03948k