Release Time:2019-03-11  Hits:

Indexed by: Journal Article

Date of Publication: 2013-12-12

Journal: Advanced Materials Research

Included Journals: Scopus、SCIE、CPCI-S、EI

Volume: 884-885

Page Number: 51-54

ISSN: 9783037859957

Key Words: dendritic effect; dendrigraft; photochromic; spiropyran

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.