Many five membered etherocyclic rings attract attention as their non planar structures leads to a variety of desirable unique features in the so called “banana” mesogens, for their slightly bent structures. Thiophene in particular has emerged as a core unit that is receiving increasing attention, both in organic and in coordination compounds. Thiophene based polymers are often employed in optics and opto-electronics for its unique properties. Here we present the synthesis of two types of polymers. Their LC behaviour is investigated. The polymers are characterized by the presence of flexible chains and of a thiophene unit in the rigid molecular segment: -C6H4-CH=N-2,5-(C4H2S)-N=N-C6H4-. One type of polymer is a simply organic main-chain LC polymer, eventually bearing functions suited for crosslinking. The second type is a coordination polymer of Pd(II) or Cu(II) where the coordination environment is given by two chelating N,O- moieties.

NEW LC THIOPHENE BASED ORGANIC AND COORDINATION POLYMERS

CARUSO, UGO;PANUNZI, BARBARA;ROVIELLO, ANTONIO;TINGOLI, MARCO
2009

Abstract

Many five membered etherocyclic rings attract attention as their non planar structures leads to a variety of desirable unique features in the so called “banana” mesogens, for their slightly bent structures. Thiophene in particular has emerged as a core unit that is receiving increasing attention, both in organic and in coordination compounds. Thiophene based polymers are often employed in optics and opto-electronics for its unique properties. Here we present the synthesis of two types of polymers. Their LC behaviour is investigated. The polymers are characterized by the presence of flexible chains and of a thiophene unit in the rigid molecular segment: -C6H4-CH=N-2,5-(C4H2S)-N=N-C6H4-. One type of polymer is a simply organic main-chain LC polymer, eventually bearing functions suited for crosslinking. The second type is a coordination polymer of Pd(II) or Cu(II) where the coordination environment is given by two chelating N,O- moieties.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11588/364692
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