A highly selective on-off-on responsive lanthanide(III) based probe for recognition of copper and hydrogen sulfide was written by Yip, Yuk-Wang;Law, Ga-Lai;Wong, Wing-Tak. And the article was included in Dalton Transactions in 2016.Application In Synthesis of (4-Bromopyridin-2-yl)methanol This article mentions the following:
The development of a europium(III) based probe (EuL1) for the detection of Cu(II) ions and hydrogen sulfide is presented. With the addition of Cu(II) ions, EuL1 displayed the greatest quenching among the other cations examined The binding constant was 74 026 ± 2899 M-1. Once combined with Cu(II) ions, EuL1Cu demonstrated high specificity for hydrogen sulfide compared to other organic and inorganic sulfur compounds EuL1Cu exhibited an on-off-on type luminescence change with the alternate addition of Cu(II) ions and H2S along with reversible forming-separating of the complex. In the experiment, the researchers used many compounds, for example, (4-Bromopyridin-2-yl)methanol (cas: 131747-45-0Application In Synthesis of (4-Bromopyridin-2-yl)methanol).
(4-Bromopyridin-2-yl)methanol (cas: 131747-45-0) belongs to pyridine derivatives. Pyridine has a dipole moment and a weaker resonant stabilization than benzene (resonance energy 117 kJ·mol−1 in pyridine vs. 150 kJ·mol−1 in benzene). Reduced pyridines, namely tetrahydropyridines, dihydropyridines and piperidines, are found in numerous natural and synthetic compounds. The synthesis and reactivity of these compounds have often been driven by the fact many of these compounds have interesting and unique pharmacological properties. Application In Synthesis of (4-Bromopyridin-2-yl)methanol