Effect of Dendritic Architecture on Photochromism of Spiropyran Functionalized Dendrigraft Polybutadiene

Abstract:

This paper demonstrated the photochromic behavior of two novel spiropyran functionalized dendrigraft polybutadiene with linear-comb and star-comb architectures (LC-PB-Sp and SC-PB-Sp, respectively). LC-PB-Sp and SC-PB-Sp were synthesized via the combination of anionic polymerization and click chemistry methodology. The photochromic behavior was investigated based on UV-Vis spectroscopy. The results showed that the coloring speed was in an order of v (Sp) >v (SC-PB-Sp) >v (LC-PB-Sp), while the discoloration speed exhibited in an order of v (SC-PB-Sp) >v (LC-PB-Sp) >v (Sp), suggesting that the nonpolar dendritic PB matrices tended to stabilize the nonpolar closed form of spiropyran. Furthermore, the retrieval rate of SC-PB-Sp was much faster than its corresponding LC-PB-Sp due to its more compact structure.

• Periodical: Advanced Materials Research (Volumes 884-885)
• Pages: 51-54
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.884-885.51
• Online since: January 2014
• Authors: Yu Zhang, Tian Jiao Yu, Yan Zhang, Yang Li*
• Keywords: Dendrigraft, Dendritic Effect, Photochromic, Spiropyran

References

[1] S. Hecht, J.M.J. Fréchet: Angew Chem Int Ed. Vol 40 (2001), p.74.

[2] S. Li, C. Gao: Polym. Chem. Vol 40 (2013), p.4450.

[3] D.C. Tully, J.M. J Fréchet: Chem. Commun Vol 14 (2001), p.1229.

[4] S. Peleshanko, V.V. Tsukruk: Prog. Polym. Sci. Vol 33(2008), p.532.

[5] H.X. Zhang, Y. Li, C.Q. Zhang, Z.S. Li, X. Li,Y.R. Wang: Macromolecules Vol 42 (2009), p.5073.

[6] Y. Zhang, K.H. Shen, F. Guo, Y.F. Wang, Y.S. Wang, Y.R. Wang, Y. Li: RSC Adv. Vol 43 ( 2013), p.20345.