Premium
Decoration of Terpyridine with Electron‐Rich Unit THDTAP: an Efficient Way to Explore Fluorescence Sensors for Recognizing Metal Ions
Author(s) -
Xu Taoshan,
Li Dongxu,
Yan Chaoxian,
Wu Yuewei,
Yuan ChengShan,
Shao Xiangfeng
Publication year - 2019
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201900226
Subject(s) - chemistry , moiety , terpyridine , intramolecular force , metal ions in aqueous solution , fluorescence , photochemistry , ion , metal , electron transfer , electrochemistry , electron acceptor , excited state , ligand (biochemistry) , acceptor , electron donor , stereochemistry , electrode , organic chemistry , catalysis , biochemistry , physics , receptor , quantum mechanics , nuclear physics , condensed matter physics
Summary of main observation and conclusion The electron‐donating unit 2,3,4,6‐tetrahydro‐1,6‐dithia‐3a‐azaphenalene (THDTAP) was introduced onto terpyridine (TPy) to give a donor‐acceptor (D‐A) type TPy‐ligand (compound 2 ). Upon selective oxidation of two sulfur atoms on the THDTAP moiety of 2 , the ligands 3 — 6 were created. The electronic structures of 2 — 6 were evaluated by theoretical, electrochemical, and spectroscopic investigations. The oxidation on the sulfur atoms brings significant influence on the electron‐donating ability of THDTAP moiety, subsequently, leads to fine modulations on intramolecular charge‐transfer (ICT) of 2 — 6 and the electronically excited states of the complexes of 2 — 6 with metal ions. Based on the optical response of 2 — 6 toward metal ions, the step‐by‐step recognition of Zn 2+ , Cd 2+ , and Ag + ions is set up by employing 2 and 3 as combined fluorescence sensors.