Synthesis of thermotropic liquid crystalline all‐ Trans‐p ‐Phenylenevinylene oligomers via two‐step metathesis | Zendy

ThornCsányi Emma | Zendy; Kraxner Peter | Zendy

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Synthesis of thermotropic liquid crystalline all‐ Trans‐p ‐Phenylenevinylene oligomers via two‐step metathesis

Author(s) -

ThornCsányi Emma,

Kraxner Peter

Publication year - 1997

Publication title -

macromolecular symposia

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.257

H-Index - 76

eISSN - 1521-3900

pISSN - 1022-1360

DOI - 10.1002/masy.19971220113

Subject(s) - metathesis , thermotropic crystal , condensation polymer , polymer chemistry , carbene , acyclic diene metathesis , materials science , ring opening metathesis polymerisation , liquid crystal , polymerization , chemistry , organic chemistry , liquid crystalline , polymer , catalysis , optoelectronics

Liquid crystalline products of oligomeric p ‐phenylenevinylene derivates were prepared metathetically using a stable molybdenum carbene complex (Mo(NAr Me 2 )(CHCMe 2 Ph)[OCMe(CF 3 ) 2 ] 2 ). The synthesis was conducted via two steps: 1. Metathesis polycondensation of 2, 5‐dialkyl‐1, 4‐divinylbenzenes to oligo‐(2, 5‐dialkyl‐1, 4‐phenylenevinylene)s, 2. Endcapping of the vinyl groups via cross‐metathesis using 3‐hexene. The products were characterized by 1 H‐NMR and UV/Vis spectroscopy, as well as by DSC.

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