Schematic representation of the IR-DOSY setup (left) and its operation (right). (IMAGE)
Caption
Schematic representation of the IR-DOSY setup (left) and its operation (right). A sample solution (M) and pure solvent (S) are pumped into a channel (4 mm wide). The flow rates of the sample solution and solvent are the same, so at the midpoint of the channel an interface I establishes. When measuring the IR absorption in the solvent-filled half (the green bordered region), a time-dependent spectrum is observed in which the absorption peaks of the smaller S2 molecules (red) appear before those of the larger S1 molecules (blue)
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