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Results for “conjugated polymers”
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Understanding Bipolarons in Conjugated Polymers Using a Multiparticle Holstein Approach
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Role of Interfacial Interactions in the Graphene-Directed Assembly of Monolayer Conjugated Polymers
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Understanding the Aggregation and Flow Response of Donor–Acceptor Conjugated Polymers
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Increasing Volume in Conjugated Polymers to Facilitate Electrical Doping with Phosphomolybdic Acid
Molecular p-type electrical dopants have been proven useful to fine-tune the optoelectronic properties of bulk organic semiconductors and their interfaces. In this work, the volume in polymer films and its role in solution-based electrical p-type doping using phosphomolybdic acid (PMA) are studied. The polymer film volume was controlled using two approaches. One is based on heating both the PMA solution and the film prior to immersion. The second is based on coating the polymer film with a liquid blend that contains the PMA solution and a swelling solvent. 31 P NMR and FTIR experiments indicate that the Keggin structure appears to be preserved throughout the doping process. Results show that increasing the polymer volume facilitates the infiltration of the PMA Keggin structure, which results in an increased electrical p-type doping level.
Role of Multivalent Interactions in Dynamic-Template-Directed Assembly of Conjugated Polymers
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Polymer Domains Control Diffusion in Protein-Polymer Conjugate Biosensors
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Evidence of Preformed Lewis Acid–Base and Wheland-Type Complexes Acting as Dopants for p-Type Conjugated Polymers
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Development of design strategies for conjugated polymer binders in lithium-ion batteries
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Natural optical activity as the origin of the large chiroptical properties in π-conjugated polymer thin films
Polymer thin films that emit and absorb circularly polarised light have been demonstrated with the promise of achieving important technological advances; from efficient, high-performance displays, to 3D imaging and all-organic spintronic devices. However, the origin of the large chiroptical effects in such films has, until now, remained elusive. We investigate the emergence of such phenomena in achiral polymers blended with a chiral small-molecule additive (1-aza[6]helicene) and intrinsically chiral-sidechain polymers using a combination of spectroscopic methods and structural probes. We show that – under conditions relevant for device fabrication – the large chiroptical effects are caused by magneto-electric coupling (natural optical activity), not structural chirality as previously assumed, and may occur because of local order in a cylinder blue phase-type organisation. This disruptive mechanistic insight into chiral polymer thin films will offer new approaches towards chiroptical materials development after almost three decades of research in this area.
Chiral emergence in multistep hierarchical assembly of achiral conjugated polymers
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Supramolecular chirality largely modulates chemical doping of conjugated polymers
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