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Bithiophenesilane-Based Dendronized Polymers: Facile Synthesis and Properties of Novel Highly Branched Organosilicon Macromolecular Structures

The synthesis of two novel bithiophenesilane-based dendronized polymers by a chain growth Kumada polymerization, their molecular properties in dilute solutions and thermal properties in the bulk are described and compared with those of bithiophenesilane dendrimers. GPC equipped with a dual light scattering detector has shown that the polymers exhibit narrow polydispersity indices (PDI = 1.22–1.23) and have a weight-average polymerization degree of 44 for P1 and 30 for P2, which correspond to 88 and 120 bithiophenesilane fragments, respectively. Spectral-luminescent investigations showed that both polymers among with the bithiophenesilanes contain from 1 to 4 terthiophenesilane fragments in every macromolecule, which leads to the so-called “dendritic molecular antenna” effect. The intramolecular energy transfer efficiency was measured to be 50 and 70% for polymers P1 and P2 respectively, which, alongside with the results of viscometric studies, points out to the compact conformation of these macromolecules...

Authors:   S. A. Ponomarenko; N. N. Rasulova; Y. N. Luponosov; N. M. Surin; M. I. Buzin; I. Leshchiner; S. M. Peregudova; A. M. Muzafarov
Journal:   Macromolecules
Year:   2012
DOI:   10.1021/ma2024045
Publication date:   10-Feb-2012
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