The effect of macromolecular architecture in nanomaterials: A comparison of site isolation in porphyrin core dendrimers and their isomeric linear analogues
2002 (English)In: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 124, no 15, 3926-3938 p.Article, review/survey (Refereed) Published
The influence of macromolecular architecture on the physical properties of polymeric materials has been studied by comparing poly(benzyl ether) dendrons with their exact linear analogues. The results clearly confirm the anticipation that dendrimers are unique when compared to other architectures. Physical properties, from hydrodynamic volume to crystallinity, were shown to be different, and in a comparative study of core encapsulation in macromolecules of different architecture, energy transduction from the polymer backbone to a porphyrin core was shown to be different for dendrimers as compared to that of isomeric four- or eight-arm star polymers. Fluorescence excitation revealed strong, morphology dependent intramolecular energy transfer in the three macromolecular isomers investigated, Even at high generations, the dendrimers exhibited the most efficient energy transfer, thereby indicating that the dendritic architecture affords superior site isolation to the central porphyrin it surrounds.
Place, publisher, year, edition, pages
2002. Vol. 124, no 15, 3926-3938 p.
proton-transfer polymerization, dendritic macromolecules, hyperbranched polymers, convergent approach, block-copolymers, star polymers, molecules, micelles, binding, metalloporphyrins
IdentifiersURN: urn:nbn:se:kth:diva-21467DOI: 10.1021/ja025536uISI: 000175014000035OAI: oai:DiVA.org:kth-21467DiVA: diva2:340165
QC 201005252010-08-102010-08-102011-10-28Bibliographically approved