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Janus Dendrimer from Poly(Aryl Ether) Linked PAMAM for Supergelation and Guest Release
Author(s) -
Prabakaran Palani,
Prasad Edamana
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201601335
Subject(s) - dendrimer , janus , rhodamine b , polymer chemistry , rhodamine 6g , aryl , ether , chemistry , rhodamine , chemical engineering , materials science , organic chemistry , nanotechnology , catalysis , fluorescence , molecule , alkyl , physics , photocatalysis , quantum mechanics , engineering
The present work reports an easy‐to‐make procedure of Janus dendrimers containing two most widely used dendrons [poly(aryl ether) and poly(amido amine) {PAMAM}], and utilize them, for the first time, to form a hydrogel with supergelation ability. The first generation (G 1 G 1 ) Janus dendrimer forms hydrogel with a critical gelation concentration (CGC) of 6.5 mg/mL, whereas the CGC for G 1 G 1.5 dendrimer went as low as 0.90 mg/mL in DMSO‐H 2 O mixture. Judicious choice of solvent medium (ethanol‐water) led to the formation of flexible morphology (long fibres to vesicles) by the Janus dendrimers, suggesting the possibility of tuning the mechanism of self‐assembly in the system. The dye (rhodamine B) loading efficiency in the gel was successfully carried out using different generations {G 1 G 1 and G 1 G 1.5 } of the Janus dendrimer. Generation G 1 G 1 hydrogel (1 wt%) showed maximum dye loading efficiency of 4 mg/mL. Rhodamine B release profiles from the Janus dendrimers were determined and the results indicate that slow release kinetics was observed in the case of G 1 G 1 , where the self‐assembly is robust.