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New insight into the synthesis of a novel azo-based optically active polyamidoamine side chain dendritic polyester
Samaresh Ghosh1, Ajit K Banthia, Bhaskar G Maiya
1Materials Science Centre, Indian Institute of Technology, Kharagpur, 721302, India.
Organic Letters
|October 12, 2002
Abstract:
[reaction: see text] A novel chiral polyamidoamine side chain dendritic polyester 4 has been synthesized and found to be a photoresponsive system undergoing reversible E/Z photochemical/thermal isomerization of azo units. Thorough characterization (IR,UV-vis, NMR, FAB-MS, elemental analysis, optical rotation, etc.) were performed to ascertain the structures of dendrimers 2, 3, and 4. The intrinsic viscosity of 4 at 36 degrees C in CHCl(3) was found to be 0.48 dl/g.