Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Functionalization of Biphenylcarbazole (CBP) with Siloxane-hybrid Chains for Solvent-Free Liquid Materials

Version 1 : Received: 13 December 2021 / Approved: 14 December 2021 / Online: 14 December 2021 (10:54:36 CET)

How to cite: Shaya, J.; Correia, G.; heinrich, B.; Ribierre, J.; Polychronopoulou, K.; Mager, L.; Méry, S. Functionalization of Biphenylcarbazole (CBP) with Siloxane-hybrid Chains for Solvent-Free Liquid Materials. Preprints 2021, 2021120222 (doi: 10.20944/preprints202112.0222.v1). Shaya, J.; Correia, G.; heinrich, B.; Ribierre, J.; Polychronopoulou, K.; Mager, L.; Méry, S. Functionalization of Biphenylcarbazole (CBP) with Siloxane-hybrid Chains for Solvent-Free Liquid Materials. Preprints 2021, 2021120222 (doi: 10.20944/preprints202112.0222.v1).

Abstract

We report herein the synthesis of siloxane-functionalized CBP molecules (4,4’-bis(carbazole)-1,1′-biphenyl) for liquid optoelectronic applications. The room-temperature liquid state is obtained through a convenient functionalization of the molecules with heptamethyltrisiloxane chains via hydrosilylation of alkenyl spacers. The synthesis comprises screening of metal-catalyzed methodologies to introduce alkenyl linkers into carbazoles (Stille and Suzuki Miyaura cross-couplings), incorporate the alkenylcarbazoles to dihalobiphenyls (Ullmann coupling), and finally introduce the siloxane chains. The used conditions allowed the synthesis of the target compounds, despite the high reactivity of the alkenyl moieties bound to π-conjugated systems toward undesired side reactions such as polymerization, isomerization, and hydrogenation. The features of these solvent-free liquid CBP derivatives make them potentially interesting for fluidic optoelectronic applications.

Keywords

molecular liquid; allyl isomerization; Stille coupling; Ullmann coupling; hydrosilylation; liquid optoelectronics; liquid semiconductor

Subject

CHEMISTRY, Organic Chemistry

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