Supramolecular hierarchy among halogen and hydrogen bond donors in light-induced surface patterning
Halogen bonding, a noncovalent interaction possessing several unique features compared to the more familiar hydrogen bonding, is emerging as a powerful tool in functional materials design. Herein, we unambiguously show that one of these characteristic features, namely high directionality, renders halogen bonding the interaction of choice when developing azobenzene-containing supramolecular polymers for light-induced surface patterning. The study is conducted by using an extensive library of azobenzene molecules that differ only in terms of the bond-donor unit. We introduce a new tetrafluorophenol-containing azobenzene photoswitch capable of forming strong hydrogen bonds, and show that an io…
Supramolecular control of liquid crystals by doping with halogen-bonding dyes
Introducing photochromic or polymeric dopants into nematic liquid crystals is a well-established method to create stimuli-responsive photonic materials with the ability to "control light with light". Herein, we demonstrate a new material design concept by showing that specific supramolecular interactions between the host liquid crystal and the guest dopants enhance the optical performance of the doped liquid crystals. By varying the type and strength of the dopant-host interaction, the phase-transition temperature, the order parameter of the guest molecules, and the diffraction signal in response to interference irradiation, can be accurately engineered. Our concept points out the potential…
CCDC 1535157: Experimental Crystal Structure Determination
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CCDC 1025655: Experimental Crystal Structure Determination
Related Article: Marco Saccone, Valentina Dichiarante, Alessandra Forni, Alexis Goulet-Hanssens, Gabriella Cavallo, Jaana Vapaavuori, Giancarlo Terraneo, Christopher J. Barrett, Giuseppe Resnati, Pierangelo Metrangolo, Arri Priimagi|2015|J.Mater.Chem.C|3|759|doi:10.1039/C4TC02315C
CCDC 1025656: Experimental Crystal Structure Determination
Related Article: Marco Saccone, Valentina Dichiarante, Alessandra Forni, Alexis Goulet-Hanssens, Gabriella Cavallo, Jaana Vapaavuori, Giancarlo Terraneo, Christopher J. Barrett, Giuseppe Resnati, Pierangelo Metrangolo, Arri Priimagi|2015|J.Mater.Chem.C|3|759|doi:10.1039/C4TC02315C