The design and synthesis of electroactive and magnetic polymers
Ring-opening metathesis polymerization (ROMP) remains a valuable tool in polymer synthesis because it affords structurally well-defined, functionalized materials with highly unsaturated polymer backbones. The power and flexibility of organic and polymer chemistry are used here to create fully conjugated, electroactive organic polymers. A series of electroactive poly(norbornadienebenzoquinone-imine) and poly(norbornadienebenzoquinone) polymers have been synthesized by the ring-opening metathesis polymerization (ROMP) of functionalized bicyclo[2.2.1]hepta-2,5-dienes using alkylidene metathesis catalysts. Incorporation of these quinone and imine redox units into organic norbornadiene polymers generates highly reactive and conductive materials capable of charge storage and electrochromism. An improved precursor polymer route is described to polyparaphenylene (PPP) based upon the ring-opening metathesis polymerization (ROMP) chemistry of cis-di(3,4-dihydroxymethyl)cyclobutene dicarbonate. These precursor polybutenamers undergo a final conversion to insoluble polyparaphenylene (PPP) without destroying or disturbing the existing polymer structure. These polybutenamers are of great interest because they incorporate high degrees of acid, oxygen, and heteroatom functionality into a soluble 1,4-poly(butadiene) structure. Organic magnets offer new insights into the nature of magnetism and lead to the development of materials with unique optical, electrical, and magnetic properties. To test the Topological Coupling Model an organic-based ferromagnetic polymer was designed around the ring-opening metathesis polymerization (ROMP) of 3-diphenylmethylenecyclobutene. Doping, the generation of charged species along the polymer, generates a radical spin (1,2) on every monomer unit in the polymer chain, resulting in a fully conjugated polybutenamer polymer. Oxidative doping of this material evokes ferromagnetic couplings among unpaired spins in the material.
- Research Organization:
- California Inst. of Tech., Pasadena, CA (United States)
- OSTI ID:
- 7274157
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360601* -- Other Materials-- Preparation & Manufacture
360606 -- Other Materials-- Physical Properties-- (1992-)
ALKENES
AROMATICS
BENZOQUINONES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CYCLOALKENES
ELECTRIC CONDUCTORS
ELECTRICAL PROPERTIES
HYDROCARBONS
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
MATERIALS
NORBORNADIENE
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
PHYSICAL PROPERTIES
POLYMERIZATION
POLYMERS
QUINONES
SYNTHESIS