showing 9 related works from this author
Surface-relief gratings in halogen-bonded polymer-azobenzene complexes A concentration-dependence study
2017
In recent years, supramolecular complexes comprising a poly(4-vinylpyridine) backbone and azobenzene-based halogen bond donors have emerged as a promising class of materials for the inscription of light-induced surface-relief gratings (SRGs). The studies up to date have focused on building supramolecular hierarchies, i.e., optimizing the polymer–azobenzene noncovalent interaction for efficient surface patterning. They have been conducted using systems with relatively low azobenzene content, and little is known about the concentration dependence of SRG formation in halogen-bonded polymer–azobenzene complexes. Herein, we bridge this gap, and study the concentration dependence of SRG formation…
Supramolecular hierarchy among halogen and hydrogen bond donors in light-induced surface patterning
2015
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…
Photoresponsive ionic liquid crystals assembled: Via halogen bond: En route towards light-controllable ion transporters
2017
We demonstrate that halogen bonding (XB) can offer a novel approach for the construction of photoresponsive ionic liquid crystals. In particular, we assembled two new supramolecular complexes based on 1-ethyl-3-methylimidazolium iodides and azobenzene derivatives containing an iodotetrafluoro-benzene ring as XB donor, where the iodide anion acted as an XB acceptor. DSC and X-ray diffraction analyses revealed that the preferred stoichiometry between the XB donors and acceptors is 2 : 1, and that the iodide anions act as bidentate XB-acceptors, binding two azobenzene derivatives. Due to the high directionality of the XB, calamitic superanions are obtained, while the segregation occurring betw…
Supramolecular control of liquid crystals by doping with halogen-bonding dyes
2017
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
2017
Related Article: Jaana Vapaavuori, Antti Siiskonen, Valentina Dichiarante, Alessandra Forni, Marco Saccone, Tullio Pilati, Christian Pellerin, Atsushi Shishido, Pierangelo Metrangolo, Arri Priimagi|2017|RSC Advances|7|40237|doi:10.1039/C7RA06397K
CCDC 1541305: Experimental Crystal Structure Determination
2017
Related Article: Marco Saccone, Francisco Fernandez Palacio, Gabriella Cavallo, Valentina Dichiarante, Matti Virkki, Giancarlo Terraneo, Arri Priimagi, Pierangelo Metrangolo|2017|Faraday Discuss.|203|407|doi:10.1039/C7FD00120G
CCDC 1541306: Experimental Crystal Structure Determination
2017
Related Article: Marco Saccone, Francisco Fernandez Palacio, Gabriella Cavallo, Valentina Dichiarante, Matti Virkki, Giancarlo Terraneo, Arri Priimagi, Pierangelo Metrangolo|2017|Faraday Discuss.|203|407|doi:10.1039/C7FD00120G
CCDC 1025655: Experimental Crystal Structure Determination
2014
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
2014
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