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)?
Dalton Transactions Pub Date: 2016-12-08 DOI: 10.1039/C6DT03948K
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%, ?Zn = 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%, ?Cd = 0.015).
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Journal Name：Dalton Transactions
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CAS no.: 89640-58-4
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