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Synthesis and Photophysical Studies of Calixarene‐Based Alkynylplatinum(II) Terpyridine Complexes with Various Receptor Sites for Colorimetric and Luminescence Sensing of Anions
Author(s) -
Hau Franky KaWah,
Lo HiuSuet,
Yam Vivian WingWah
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201503401
Subject(s) - chemistry , terpyridine , stacking , luminescence , amide , intramolecular force , ion , absorption (acoustics) , calixarene , absorption spectroscopy , photochemistry , proton nmr , stereochemistry , crystallography , molecule , metal , organic chemistry , materials science , physics , optoelectronics , quantum mechanics , composite material
A series of mononuclear and dinuclear platinum(II) terpyridine complexes with amide‐, sulfonamide‐, and urea‐containing ligands ( 1 – 9 ) has been successfully designed and synthesized, and their photophysical and anion‐binding properties have been studied. The anion‐binding properties of the complexes were studied by electronic absorption, emission, and 1 H NMR spectroscopy. Upon the binding with anions, the dinuclear complexes 1 – 3 exhibit large electronic absorption and emission spectral changes, while for the mononuclear analogues 4 – 6 much smaller spectral changes were observed. Interesting colorimetric responses towards different anions were observed in dinuclear complexes 1 – 3 . Dinuclear complexes 7 – 9 are found to be insensitive to anion‐binding, which could be attributed to the presence of intramolecular Pt⋅⋅⋅Pt interactions and/or π–π stacking in the complexes that led to the reduced anion‐binding affinity.