Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (12): 1431-1436.DOI: 10.11944/j.issn.1000-0518.2015.12.150147

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Synthesis and Property of Symmetrical Bispyridylthienylethenes Photochromic Compound

SUN Aibing,YU Chuanming,HU Bingcheng()   

  1. Institute of Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China
  • Received:2015-04-27 Accepted:2015-07-13 Published:2015-12-01 Online:2015-12-01
  • Contact: HU Bingcheng

Abstract:

Photochromic bisthienylethene has advantages of thermal-stability and fatigue-resistance. This paper reported a new 3-stage synthesis of 1,2-bis(5-pyridyl-2-methylthien-3-yl)cyclopentene in 61% total yield via Suzuki coupling, Friedel-Crafts acylation and McMurry coupling by using 2-methylthiophene as the starting material. The intermediates and the target compound were confirmed by 1H NMR, 13C NMR, MS and IR. This synthetic method is concise, high yielding and easy for scaling up. Photochromic properties of the target compound and its interaction with Ni2+, Sn2+ were also investigated by UV-Vis spectroscopy and fluorescent emission spectroscopy. Symmetrical 1,2-bis(5-pyridyl-2-methylthien-3-yl)cyclopentene displayed different colors and UV-Vis spectra by coordinated with metal ions. The response to ions allowed the material to be used as a new kind of probe for metal ions.

Key words: photochromism, diarylethene, pyridine, probe