2,4,6-Triamino-triazine/barbiturate

Fig. 47 Assembly of calix[4]arenes via 2,4,6-triamino-triazine/barbiturate interactions. Reprinted with permission from [165]...

Figure 3.20 Continued) (c) Formation of toroidal aggregates via assembly of barbituric acid/2,4,6-triamino-1,3,5-triazine building blocks. (Reproduced with permission from S. Yagai, S. Mahesh, Y. Kikkawa et aL, Toroidal nanoobjects from rosette assemblies of melamine-linked oligo(p-phenyleneethynylene)s and cyanurates., Angewandte Chemie International Edition, 2008, 47, 4691-4694. Wiley-VCH Verlag GmbH Co. KGaA.)...

A final example of complex assembly of small molecules via H bonds is shown in Figure 3.20c (Yagai et al, 2008). The formation of a toroidal aggregate is described via a combination of (a) hydrogen bonds of the barbituric acid/2,4,6-triamino-1,3,5-triazine system (Whitesides and Grzybowski, 2002) (b) pi-pi stacking interactions and (c) steric constraints of... 

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