2,6-diamino-triazine/thymine

Binder et al. [92,93] have reported on the formation of poly(etherketone) poly(isobutylene) networks formed by the respective endgroup-modified telechelics. The relevant interactions investigated relied on the 2,6-diamino-1,3,5-triazine/thymine and the much weaker cytosine/2,6-diamino-1,3,5-triazine-modified polymers (Fig. 18). In addition to the pure hydrogenbonding interaction, phase-separation energies resulting from the strongly microphase separating PEK- and PIB polymers were expected. The association behavior was followed in solution via NMR-association experiments. 

Fig. 21 Assembly of polymers via triple-hydrogen bonds, a Formula of the flavine/2,6-diamino-triazine and thymine/2,6-diaminotriazine interactions, b Formation of nanopar-ticles/polymer aggregates, c Polymersome formation by aggregation of poly(norbornenes) and poly(styrenes) bearing N-bisacyl-2,6-diamino-pyridine and thymine side-chains, respectively. Reprinted with permission from [104,105]...

Many supramolecular polymers are derived directly from DNA s nucleobases adenine (A), cytosine (C), guanine (G), and thymine (T) [9]. Although each nucleobase can homodimerize, as described in the previous section, heterodynamic complexation is favored to different degrees. The G-C complex involves three H-bonds, and it is two or three orders of magnitude more stable than the A-T complex, involving only two H-bonds. 2,6-Diamino triazine derivatives strongly associate with thymine, and this pair has formed the basis for many studies. 

As a result, we prepare strong multiple hydrogen-bonding interactions between the 2,4-diaminotriazine groups of the PVDAT units and the T groups of the poly(vinylbenzylthymine) (PVBT) units in blends of poly(2-vinyl-4,6-diamino-l,3,5-triazine-co-methyl methacrylafe) (PVDAT-co-PMMA) and poly(vinylbenzyl thymine-co-methyl methacrylate) (PVBT-co-PMMA) as shown in Figure 2.13 [91]. 

Butyl methacrylate-c< -vinylbenzyl thymine Styrene-c< -2-vinyl-4,6-diamino- 1,3,5-triazine Single Tg, FTIR I had <93 mol% butyl methacrylate II had <93 mol% styrene Kuo and Hsu (2010)... 

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