A Novel Mechanochromic and Photochromic Polymer Film: When Rhodamine Joins Polyurethane. (24th September 2015)

• Record Type: Journal Article
• Authors: Wang, Zhijian; Ma, Zhiyong; Wang, Yao; Xu, Zejun; Luo, Yiyang; Wei, Yen; Jia, Xinru
• Is Part Of: Advanced materials. Volume 27:Number 41(2015)
• Page Start: 6469
• Page End: 6474
• Publication Date: 2015-09-24
• Subjects: crosslinking -- mechanochromism -- photochromism -- polymer film -- rhodamine derivative; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.201503424
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract : A rhodamine‐based molecule, Rh‐OH, is synthesized . Rh‐OH exhibits a reversible mechanochromic luminescent character but a passivating response to UV light. An elastomeric polymer film based on polyurethane with embedded Rh‐OH is prepared via a polycondensation reaction. The film shows mechanochromic and photochromic properties with reversible color change, which originates from the isomerization of the Rh‐OH molecule from a twisted spirolactam in the ring‐closed form to a planarized zwitterionic structure in the ring‐open state.