Computed association strengths for 43 purine and pteridine quartets (38 to 100 kcal mol) show excellent linear correlation with π-conjugation gain in the assembled monomers (r = 0.965). Even quartets having the same secondary electrostatic interactions can display very different association strengths depending on the π-conjugation patterns of the monomeric units.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7053557PMC
http://dx.doi.org/10.1039/c9ob02412cDOI Listing

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