Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Diphenyl-2-pyridylphosphine, is researched, Molecular C17H14NP, CAS is 37943-90-1, about Bright photo- and triboluminescence of centrosymmetric Eu(III) and Tb(III) complexes with phosphine oxides containing azaheterocycles.Electric Literature of C17H14NP.
Six centrosym. mononuclear Eu3+ and Tb3+ complexes of the type [LnL2(hfac)3] were synthesized employing diphenyl(pyridin-2-yl)phosphine oxide (Ph2P(O)Py), diphenyl(pyridimin-2-yl)phosphine oxide (Ph2P(O)Pym), and diphenyl(pyrazin-2-yl)phosphine oxide (Ph2P(O)Pyr) as supporting ligands (L). The complexes [LnL2(hfac)3] (L = Ph2P(O)Py and Ph2P(O)Pyr) comprise an eight-coordinate Ln3+ ion with two monodentate O-donor phosphine oxides and three bidentate hfac- anions. In the [Ln{Ph2P(O)Pym}2(hfac)3] complexes, the Ln3+ ion is nine-coordinated by three bidentate hfac- anions and two Ph2P(O)Pym ligands, one of which is bound to Ln in a N,O-bidentate chelating mode, and the other acts as a monodentate O-donor ligand. The complexes display bright solid-state photoluminescence with emission quantum yields up to 56%. The integral intensity of 5D0 → 7F2 transition in the emission spectra of the Eu(III) complexes strongly depends on the coordination environment of the Eu3+ ion. The asym. coordination geometry around Eu3+ results in the large radiative rate constants The crystals of the Eu(III) and Tb(III) complexes exhibit triboluminescence upon breaking under ambient conditions. The relation between the triboluminescent properties and crystal structures of the complexes is discussed.
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Reference:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem