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- W2015403345 abstract "A series of dinuclear platinum(II) complexes, [(dien)Pt(NH 2 (CH 2 ) n NH 2 )Pt(dien)]Cl 4 (dien = diethylenetriamine, n = 8, 9, 10, and 12) and their corresponding [2]rotaxanes with α-cyclodextrin (α-CD), [(dien)Pt{NH 2 (CH 2 ) n NH 2 ·α-CD}Pt(dien)]Cl 4 , have been synthesized and characterized by 1 H, 13 C, and 195 Pt NMR spectroscopy and electrospray mass spectrometry. The rotaxanes were prepared by reacting the {NH 2 (CH 2 ) n NH 2 ·α-CD} pseudorotaxanes with [Pt(dien)]Cl, to stopper the included linear α,ω-diaminoalkane chains with the inert Pt(II) end groups. The kinetics of the self-assembly and dissociation of the β-CD rotaxane, [(dien)Pt{NH 2 (CH 2 ) 10 NH 2 ·β-CD}Pt(dien)] 4+ , were investigated by using 1 H NMR and are indicative of a slippage mechanism, owing to the comparable sizes of the β-CD cavity and the [Pt(dien)] + end group. A relatively weak inclusion of the end group in the β-CD cavity precedes a thermally promoted passage of the β-CD over the [Pt(dien)] + end group onto the hydrophobic polymethylene chain of the bridging ligand of the thread. Key words: rotaxanes, pseudorotaxanes, cyclodextrin, platinum complexes, slippage mechanism." @default.
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- W2015403345 date "2005-12-01" @default.
- W2015403345 modified "2023-10-10" @default.
- W2015403345 title "α- and β-Cyclodextrin [2]rotaxanes with (diethylenetriamine)platinum(II) stoppers" @default.
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- W2015403345 doi "https://doi.org/10.1139/v05-226" @default.
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