Spin Glass-like Behavior of Poly(phenylacetylene) Prepared with a Rh Complex Catalyst, 1

✍ Scribed by Masayoshi Tabata; Yuji Watanabe; Shunichi Muto

• Book ID: 102486624
• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 246 KB
• Volume: 205
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.200300256

✦ Synopsis

Abstract

Summary: Magnetic field dependence of poly(phenylacetylene) (PPA) that has been stereoregularly prepared with a Rh complex catalyst was investigated in detail between 2 K and 300 K. The data showed a spin glass‐like magnetic behavior, i.e., two cusps were clearly observed when PPA was zero‐field‐cooled together with slow increasing of the magnetization (called an ageing effect) at 45 K. The observed spin glass‐like behavior has been discussed in terms of an ageing effect, which may have been caused by weak anti‐ferromagnetic interactions between intra‐ and/or inter‐magnetic spins produced by cis‐to‐trans isomerization through the rotational scission of the cis CC bond of the PPA polymer during polymerization.

Intra‐molecular anti‐ferromagnetic interactions.

magnified imageIntra‐molecular anti‐ferromagnetic interactions.