Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - The coordination chemistry of fluorescent pyridinyl- and quinolinyl-phthalimide ligands with the {Au-I-PPh3} cationic unit
AU - Mullice, Lucy A.
AU - Thorp-Greenwood, Flora L.
AU - Laye, Rebecca H.
AU - Coogan, Michael
AU - Kariuki, BM
AU - Pope, Simon J. A.
PY - 2009
Y1 - 2009
N2 - The new mono-dentate ligands, 2-(2-aminoethyl)-N-phthalimido-pyridine (L4) and 8-amino-N-phthalimido-quinoline (L6), were synthesised using a solvent-free melt method. These ligands together with L1–3,5 (3-amino-N-phthalimido-pyridine; 3-aminomethyl-N-phthalimido-pyridine; 4-aminomethyl-N-phthalimido-pyridine; 3-amino-N-phthalimido-quinoline) were then used to access six luminescent AuI complexes of the generic type {Ph3P–Au–Ln}(OTf). X-Ray crystallography has been used to structurally characterise three of the complexes showing that in the cases of L1 and L3 the complexes adopt an approximately linear P–Au–N coordination geometry. However, in the case of the sterically demanding L6 the structure shows distortions within the ligand and deviations from a linear coordination geometry. Solution state 1H and 31P{1H} NMR confirmed that the proposed formulations and coordination modes exist in solution. At room temperature the photophysical studies showed that the emission from each of the six complexes was in the visible region (395–475 nm) and assigned to a ligand-centred fluorescence (τ < 10 ns) in each case.
AB - The new mono-dentate ligands, 2-(2-aminoethyl)-N-phthalimido-pyridine (L4) and 8-amino-N-phthalimido-quinoline (L6), were synthesised using a solvent-free melt method. These ligands together with L1–3,5 (3-amino-N-phthalimido-pyridine; 3-aminomethyl-N-phthalimido-pyridine; 4-aminomethyl-N-phthalimido-pyridine; 3-amino-N-phthalimido-quinoline) were then used to access six luminescent AuI complexes of the generic type {Ph3P–Au–Ln}(OTf). X-Ray crystallography has been used to structurally characterise three of the complexes showing that in the cases of L1 and L3 the complexes adopt an approximately linear P–Au–N coordination geometry. However, in the case of the sterically demanding L6 the structure shows distortions within the ligand and deviations from a linear coordination geometry. Solution state 1H and 31P{1H} NMR confirmed that the proposed formulations and coordination modes exist in solution. At room temperature the photophysical studies showed that the emission from each of the six complexes was in the visible region (395–475 nm) and assigned to a ligand-centred fluorescence (τ < 10 ns) in each case.
U2 - 10.1039/b905123f
DO - 10.1039/b905123f
M3 - Journal article
VL - 38
SP - 6836
EP - 6842
JO - Dalton Transactions
JF - Dalton Transactions
SN - 1477-9234
IS - 34
ER -