Three polymer-amphiphile complexes were prepared by combining poly(allylamine hydrochloride)(PAH) with the potassium salt of mono-,di-,and trisubstituted benzoic acid dendrons(4-octyloxybenzoic acid,3,5-dioctyloxybenzoic acid,and 3,4,5- trioctyloxybenzoic acid).The solid structure and properties were monitored with FT-IR,XRD,TG,DSC,and polarized optical microscope(POM).Difference in the tail chain number of the dendritic amphiphile induced two different mesomorphous structures: lamella for the mono-,disubstituted dendron containing complexes and hexagonal column for the trisubstituted dendron containing complexes.These corresponded to the ionic thermotropic liquid crystal SmA andΦ_h phases,respectively.This finding is significant for design of functional nanostructures based on the ionic complexation of polymers and amphiphiles.
Zhi Yu Cheng Bi Ye Ren Shu Ying He Xin Xing Liu Zhen Tong
Three novel redox-active percec-type dendrons were synthesized by mucleophilic substitution reaction of 11-bromoundecyl ferrocene and substituted benzoate.All the resultant ferrocenyl-modified dendrons were confirmed through FT-IR,NMR,and elemental analysis,etc.Furthermore,the thermal properties and electrochemical behavior of these dendrons were monitored with thermogravimetry analysis(TG),differential scanning calorimetry(DSC),polarized optical microscope(POM),and cyclic voltammetry(CV). Abound phase behavior and reversible electrochemical redox reaction process in the DMF solution of these dendrons was observed.
