PAMAM, mesomorphism

Note that this behavior is in marked contrast to that of the zeroth to the second generation of related PAMAM and PPI dendrimers (Nc = 3, Mb = 2) with 4 -cyanobiphenyl hydrogen glutarate that did not produce any mesomorphic behavior, except a lyotropic nematic phase in 80 wt % N,N -dimethylformamide (DMF) solutions containing lithium bromide [204,205]. 

Fig. 29 Mesomorphism of PAMAM (left) and PPl (right) dendrimers functionalized by Li...

In order fo furfher invesfigafe fhe influence of fhe sfrucfure of the mesogenic units on the mesomorphic behavior of the dendrimers, bulky units have been introduced at the periphery of the third and fourth generations of amino-terminated PAMAM and PPI (Fig. 39, L3, Le, L9), wifh the aim of achieving cubic mesophases, since the increased volume around the dendritic core could in principle force the dendrimer to adopt a globular conformation [199,222],... 

---