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- W2332555765 abstract "The four heteronuclear clusters [Ag2Au2(μ-dpppy)3(C≡CC6H4R-4)2](ClO4)2 (R = H (1) CH3 (2), COOCH3 (3), CHO (4)) were prepared by the self-assembly reaction between (AuC≡C6H4R-4)n (R = H, CH3, COOCH3, CHO) and [Ag2(μ-dpppy)3]2+ (dpppy = 2,6-bis(diphenylphosphino)pyridine) and characterized by elemental analyses, electrospray ionization mass spectrometry (ESI-MS), and 1H NMR and 31P{1H} NMR spectroscopy and by X-ray crystallography for 1, 3, and 4. It is revealed that the complexes exhibit bright blue (1–3) and green (4) luminescence in the solid state and in solution with the luminescent lifetimes in the microsecond range, indicating that the luminescence is most likely associated with a spin-forbidden triplet parentage. Interestingly, only complex 4 displays distinctly mechanical grinding responsive emission switching. The recognition interactions of complex 4 containing aldehyde groups with homocysteine (Hcy) and cysteine (Cys) have been studied by UV–vis and emission titrations. A strong luminescence quench was found upon reaction of complex 4 only with Hcy or Cys, but not with other amino acids, proteins, and common anions, indicating a high specificity for recognition of Hcy and Cys." @default.
- W2332555765 created "2016-06-24" @default.
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- W2332555765 date "2013-08-20" @default.
- W2332555765 modified "2023-09-28" @default.
- W2332555765 title "New Luminescent Ag<sub>2</sub>Au<sub>2</sub> Heteronuclear Alkynyl–Phosphine Complexes and Recognition of Homocysteine and Cysteine" @default.
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- W2332555765 doi "https://doi.org/10.1021/om400646p" @default.
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