Europium(III) Macrocyclic Chelates Appended with Tyrosine‐based Chromophores and Di‐(2‐picolyl)amine‐based Receptors: Turn‐On Luminescent Chemosensors Selective to Zinc(II) Ions | Zendy

Wang Gaoji | Zendy; PlatasIglesias Carlos | Zendy; Angelovski Goran | Zendy

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Europium(III) Macrocyclic Chelates Appended with Tyrosine‐based Chromophores and Di‐(2‐picolyl)amine‐based Receptors: Turn‐On Luminescent Chemosensors Selective to Zinc(II) Ions

Author(s) -

Wang Gaoji,

PlatasIglesias Carlos,

Angelovski Goran

Publication year - 2020

Publication title -

chempluschem

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.801

H-Index - 61

ISSN - 2192-6506

DOI - 10.1002/cplu.201900731

Subject(s) - moiety , chemistry , chromophore , luminescence , amine gas treating , lanthanide , zinc , europium , photoinduced electron transfer , metal ions in aqueous solution , combinatorial chemistry , photochemistry , chelation , fluorescence , electron transfer , ion , stereochemistry , inorganic chemistry , organic chemistry , materials science , physics , optoelectronics , quantum mechanics

Zinc ions play an important role in many biological processes in the human body. To selectively detect Zn 2+ , two EuDO3A‐based complexes (DO3A=1,4,7,10‐tetraazacyclododecane‐1,4,7‐tricarboxylic acid) appended with tyrosine as a chromophore and di‐(2‐picolyl)amine (DPA) as the Zn 2+ recognition moiety were developed as suitable luminescent sensors. Their luminescence intensity is affected by the photoinduced electron transfer mechanism. Upon addition of Zn 2+ , both probes display an up to sevenfold enhancement in Eu 3+ emission. Competition experiments demonstrated their specificity toward Zn 2+ over other metal ions, while also revealing the nonspecificity of the derivatives lacking the DPA‐moiety, thus confirming the essential role of the DPA for the recognition of Zn 2+ . The induced emission changes of Eu 3+ allow for precise quantitative analysis of Zn 2+ , establishing these lanthanide‐based complexes as viable chemosensors for biological applications.

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