Research output: Contribution to Journal/Magazine › Journal article › peer-review
The comparison of fac and mer ruthenium(II) trischelate complexes in anion binding. / Baker, Naomi C. A.; McGaughey, Neil; Fletcher, Nicholas C. et al.
In: Dalton Transactions, No. 6, 2009, p. 965-972.Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - The comparison of fac and mer ruthenium(II) trischelate complexes in anion binding
AU - Baker, Naomi C. A.
AU - McGaughey, Neil
AU - Fletcher, Nicholas C.
AU - Chernikov, Aleksey V.
AU - Hortonb, Peter N.
AU - Hursthouse, Michael B.
PY - 2009
Y1 - 2009
N2 - The synthesis of three new homoleptic trischelate ruthenium( II) complexes bearing new 2,2'-bipyridine ligands, 5,5'-dibenzylamido-2,2'-bipyridine (L1) and 5-benzylamido-2,2'- bipyridine (L2) has been achieved. In the case of [Ru(L2)(3)](2+), the mer and fac isomers have been separated. H-1 NMR spectroscopic anion binding studies indicate that the two C-3-symmetric pockets provided by [ Ru(L1)(3)](2+) is conducive to receive a range of anions, although this is not readily reflected in the photophysical behaviour. The fac-isomer of [Ru(L2)(3)](2+) does appear to have an enhancement in the binding interactions over the mer form with dihydrogenphosphate salts, although the difference is much less marked with the spherical chloride ions. From X-ray crystallographic evidence, the ability to hold water in the "anion" binding cleft can inhibit the strength of the interactions with anions, giving rise to the observed selectivity for directional oxoanions such as dihydrogen phosphate.
AB - The synthesis of three new homoleptic trischelate ruthenium( II) complexes bearing new 2,2'-bipyridine ligands, 5,5'-dibenzylamido-2,2'-bipyridine (L1) and 5-benzylamido-2,2'- bipyridine (L2) has been achieved. In the case of [Ru(L2)(3)](2+), the mer and fac isomers have been separated. H-1 NMR spectroscopic anion binding studies indicate that the two C-3-symmetric pockets provided by [ Ru(L1)(3)](2+) is conducive to receive a range of anions, although this is not readily reflected in the photophysical behaviour. The fac-isomer of [Ru(L2)(3)](2+) does appear to have an enhancement in the binding interactions over the mer form with dihydrogenphosphate salts, although the difference is much less marked with the spherical chloride ions. From X-ray crystallographic evidence, the ability to hold water in the "anion" binding cleft can inhibit the strength of the interactions with anions, giving rise to the observed selectivity for directional oxoanions such as dihydrogen phosphate.
KW - BIPYRIDYL RECEPTOR MOLECULES
KW - TRIPLE-HELICAL ARRAY
KW - TRANSITION-METAL
KW - SECONDARY FUNCTIONALIZATION
KW - RECOGNITION
KW - LIGANDS
KW - ISOMERS
KW - DNA
U2 - 10.1039/b816149f
DO - 10.1039/b816149f
M3 - Journal article
SP - 965
EP - 972
JO - Dalton Transactions
JF - Dalton Transactions
SN - 1477-9226
IS - 6
ER -