First Homopolymerizable Monomer Containing [C₆₀]Fullerene as a Monoadduct Substituent

Abstract

Summary: The hydrosilylation of C60 with 2,4,6,8‐tetramethylcyclotetrasiloxane in the presence of platinum/carbon catalyst produced the cationically polymerizable (C60HsiMeO)4 along with [(C60HsiMeO)3SiMeO]2C60H2 and a polymer consisting of C60 and (SiMeO)4 units. The synthesis and characterization of this first polymerizable tetracyclosiloxane ring system containing C60 as a monoadduct substituent are also reported.Synthesis and polymerization of 2,4,6,8‐tetramethyl‐2,4,6,8‐tetrafulleryl‐cyclotetrasiloxane.imageSynthesis and polymerization of 2,4,6,8‐tetramethyl‐2,4,6,8‐tetrafulleryl‐cyclotetrasiloxane.

Fullerene Polymers: Synthesis and Properties

“…239 Again, C 60 was loaded into the polymer by means of pendant amino-fishing groups, giving rise to low weight macromolecules with moderate C 60 content (184a, 2.5%; 184b, 3.9%). However, the first example in which a C 60 - containing siloxane monomer (186) was polymerized to give the corresponding homopolymer 187 was recently reported, 240 as depicted in Scheme 44. Polymerization was carried out using triflic acid as initiator, and GPC revealed a high M n value (95 000).…”

Chapter 4. Fullerene-Containing Polymers

“…47 Finally, Pt-catalysed hydrosilation has been used to link fullerene to 2,4,6,8-tetramethylcyclotetrasiloxane 33. 48 The subsequent polymerisation of 34 took place by means of triflic acid affording polymer 35.…”

Fullerenes

“…164 Polymers A polymerisable tetracyclosiloxane [60]fullerene monomer has been prepared which after treatment with triflic acid results in the formation of polysiloxane with an average molecular weight of 95 000. 165 Electropolymerisation of [60]fullerene in the presence of oxygen is proposed to proceed via initial nucleophilic attack of superoxide on [60]fullerene to form a radical anion, C 60 O 2 dÀ , which then reacts further with another molecule of [60]fullerene resulting in the formation of the epoxide C 60 O and C 60 O dÀ , C 60 2À is then formed and [60]fullerene polymerised. 166 [60]Fullerene end-capped isotactic poly(methyl methacrylate) with an average molecular weight of 115 000 has been prepared by initial stereospecific anionic living polymerisation followed by [60]fullerene end capping.…”