A comparison of para, meta, and ortho-carborane centred non-fullerene acceptors for organic solar cells

Abstract

We report the first examples of carborane-containing non-fullerene acceptors (NFAs), and their use in organic photovoltaic (OPV) devices. NFAs employing an A-D-A’-D-A type design centred around a central electron withdrawing...

A Conjugated Carboranyl Main Chain Polymer with Aggregation-Induced Emission in the Near-Infrared

“…64 This was achieved by coupling the dibrominated IDT core with di(5-(trimethylstannyl)thiophen-2-yl)-carborane comonomers under Stille polymerization conditions using microwave heating. 65,66 Here, the flanking thiophenes play a dual role; while facilitating the polymerization, they also extend the conjugated π-system, further narrowing the optical gap of the final polymer. Following polymerization, the polymers were isolated by precipitation followed by sequential solvent extraction with methanol, acetone, and hexane.…”

“…In pursuit of a narrow optical gap material, indacenodithiophene (IDT) was chosen as the central aromatic moiety due to its extended π-conjugated core and high density solubilizing side chain. , Furthermore, its frequent use as an electron donating moiety makes it well suited to promote efficient ICT with the carboranyl unit. , A polymeric structure was chosen for the benefit of processability and quality of fabricated devices . This was achieved by coupling the dibrominated IDT core with di­(5-(trimethylstannyl)­thiophen-2-yl)-carborane comonomers under Stille polymerization conditions using microwave heating. , Here, the flanking thiophenes play a dual role; while facilitating the polymerization, they also extend the conjugated π-system, further narrowing the optical gap of the final polymer. Following polymerization, the polymers were isolated by precipitation followed by sequential solvent extraction with methanol, acetone, and hexane.…”

From alkaline earth to coinage metal carboranyls

“…The o-carborane (o-C 2 B 10 H 12 ) isomer for example, is more prominent in light-emitting applications, driven by the aggregation-induced emission that is typically observed for o-carborane containing materials. 8 Similarly, o-carborane has attracted significant attention in future antitumour therapeutics, specifically boron neutron capture therapy (BNCT). [9][10][11] Much research, therefore, has focused upon the modification of carboranes as a means to enhance their biologically relevant properties, commonly via ligand or indeed metal functionalisation.…”

Anchoring Effect of Hyperbranched Carborane in Highly Cross-Linked Cyclosiloxane Networks toward High-Performance Polymers

“…This would enhance the thermal stability of CHP and build inter-sheet linkages between CHP layers, which in turn improves its mechanical properties. Icosahedral carborane has a unique cage structure, high boron content, and high thermal stability, making it one of the most classical synthons for the synthesis of hybrid materials with unusual properties. − Each site on the carborane cage can be functionalized. The high electronegativity and electron affinity of the carbon atom of the carborane cage render the hydrogen atom acidic .…”