title: Mechano- and Thermoresponsive Photoluminescent Supramolecular Polymer.
abstract: Mechanoresponsive luminescent (MRL) materials change their emission color upon application of external forces. Many dyes with MRL behavior are known, but they normally do not display useful mechanical properties. Here, we introduce a new approach to overcome this problem, which relies on combining MRL compounds with the concept of supramolecular polymerization. As a first embodiment, a cyano-substituted oligo(p-phenylenevinylene), whose MRL behavior is associated with different solid-state assemblies, was derivatized with two ureido-4-pyrimidinone groups, which support the formation of a dynamic supramolecular polymer. The new material displays the thermomechanical characteristics of a supramolecular polymer glass, offers three different emission colors in the solid state, and exhibits both MRL and thermoresponsive luminescent behavior.
authors.affiliation: Adolphe Merkle Institute, University of Fribourg , Chemin des Verdiers 4, 1700 Fribourg, Switzerland.
authors.forename: Anna
authors.initials: A
authors.lastname: Lavrenova
authors.affiliation: Adolphe Merkle Institute, University of Fribourg , Chemin des Verdiers 4, 1700 Fribourg, Switzerland.|Department of Bioengineering and Materials Science and Engineering, University of California Berkeley , Hearst Mining Building, Berkeley, California 94720-1760, United States.
authors.forename: Diederik W R
authors.initials: DW
authors.lastname: Balkenende
authors.affiliation: Research Institute for Electronic Science, Hokkaido University , N20, W10, Kita-Ku, Sapporo 001-0020, Japan.
authors.forename: Yoshimitsu
authors.initials: Y
authors.lastname: Sagara
authors.affiliation: Adolphe Merkle Institute, University of Fribourg , Chemin des Verdiers 4, 1700 Fribourg, Switzerland.
authors.forename: Stephen
authors.initials: S
authors.lastname: Schrettl
authors.affiliation: Adolphe Merkle Institute, University of Fribourg , Chemin des Verdiers 4, 1700 Fribourg, Switzerland.|School of Polymers and High Performance Materials, The University of Southern Mississippi , 118 College Drive, Box 5050, Hattiesburg, Mississippi 39406, United States.
authors.forename: Yoan C
authors.initials: YC
authors.lastname: Simon
authors.affiliation: Adolphe Merkle Institute, University of Fribourg , Chemin des Verdiers 4, 1700 Fribourg, Switzerland.
authors.forename: Christoph
authors.identifier: 0000-0001-7183-1790
authors.initials: C
authors.lastname: Weder