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Download fileUnraveling Confined Dynamics of Guests Trapped in Self-Assembled Pd6L4 Nanocages by Ultrafast Mid-IR Polarization-Dependent Spectroscopy
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posted on 18.02.2019, 21:18 authored by Rahul Gera, Stephen L. Meloni, Jessica M. AnnaSelf-assembled coordination
cages form host–guest complexes
through weak noncovalent interactions. Knowledge of how these weak
interactions affect the structure, reactivity, and dynamics of guest
molecules is important to further the design principles of current
systems and optimize their specific functions. We apply ultrafast
mid-IR polarization-dependent pump–probe spectroscopy to probe
the effects of two Pd6L4 self-assembled nanocages
on the properties and dynamics of fluxional group-VIII metal carbonyl
guest molecules. We find that the interactions between the Pd6L4 nanocages and guest molecules act to alter the
ultrafast dynamics of the guests, restricting rotational diffusional
motion and decreasing the vibrational lifetime.
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diffusional motionPd 6 L 4 nanocagesnoncovalent interactionsguest molecules actPd 6 L 4 self-assembled nanocagesfluxional group-VIII metal carbonyl guest moleculesvibrational lifetimeUnraveling Confined Dynamicsultrafast dynamicsultrafast mid-IR polarization-dependentdesign principlesguest moleculesSelf-Assembled Pd 6 L 4 Nanocages