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Synthesis, Characterization, and Selective Sr 2+ Sensing Study of Copper(I)‐Bridged Calix[4]arene‐Based Binuclear Alkynylplatinum(II) Complexes
Author(s) -
Chen YuZhe,
Pan Dun,
Chen Bin,
Wang GeXia,
Tung ChenHo,
Wu LiZhu
Publication year - 2017
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201700672
Subject(s) - chemistry , copper , characterization (materials science) , calixarene , inorganic chemistry , stereochemistry , combinatorial chemistry , crystallography , polymer chemistry , nanotechnology , organic chemistry , molecule , materials science
Three copper(I)‐bridged p ‐ tert ‐butylcalix[4]arene‐tethered binuclear 6‐aryl‐2,2′‐bipyridine (C ^ N ^ N) alkynylplatinum(II) complexes were designed and synthesized. Their photophysical properties and sensing ability to strontium ions (Sr 2+ ) were investigated in terms of UV/Vis absorption, emission, and 1 H NMR spectroscopy and MS. The binuclear complex bearing aza[15]crown‐5 pendants exhibited a unique emission enhancement at ca. 750 nm toward Sr 2+ ions, a result of altering the lowest excited state from the nonemissive ligand‐to‐ligand charge‐transfer state to the emissive metal–metal‐to‐ligand charge‐transfer state. A 1:1 sandwiched binding mode between Sr 2+ and the two aza[15]crown‐5 moieties in the complex was proposed.