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. 2022 Nov 10;13(46):10688–10696. doi: 10.1021/acs.jpclett.2c02721

Figure 4.

Figure 4

Schematic representation of the influence of linker length on an equilibrium between isomers of the stacked HJ covalently templating squaraine dimers. The transitional open conformation of HJ is not shown. (a) Unlabeled HJ at the dynamic equilibrium between Iso I and Iso II isomers. (b) Iso I and Iso II are equally favorable when dyes are covalently tethered to the HJ via equal-length linkers resulting in a racemic mixture of dimer enantiomorphs. (c) Noncovalent binding of dye dimer to the HJ arm in Iso I and Iso II isomers that feature opposite base pairing. (d,e) A shift in equilibrium toward a dominant HJ isomer when dyes are covalently tethered to the HJ via unequal-length linkers. A dominant isomer is the isomer where a dye–dye distance is shorter [i.e., Iso I in (d) and Iso II in (e)].