Natalie Suhan
University of Windsor
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Natalie Suhan.
Journal of the American Chemical Society | 2013
Natalie Suhan; Stephen J. Loeb; S. Holger Eichhorn
Two types of liquid crystalline [2]rotaxanes based on a conventional tetracatenar motif (a rod-shaped molecule with two side chains at each end) have been prepared. Dicationic compounds with ester stoppers and tetracationic materials with pyridinium stoppers are compared to each other and their dumbbell shaped analogs. Since the ionic core contributes about 70% to the overall length and molecular weight of the molecules, sheltering the ionic cores with an interlocked neutral macrocycle has considerable effect on the mesomorphism and thermal stability of the materials. The influence of the sheltering macrocycle, the numbers of charges on the core and the size and nature of the side chains (aliphatic vs siloxane) were probed. [2]Rotaxanes with linear side chains and minimum ratios of chain-to-core volumes of about 0.35 and 0.30 for tetra- and dicationic compounds, respectively, display smectic liquid crystal phases. Larger ratios increase the temperature range of the smectic A phases beyond the decomposition temperatures; a disadvantage for processing because no stable isotropic liquid phase is available. The change from tetra- to dicationic [2]rotaxanes increased not only the fluidity of their smectic A phases but also their thermal and chemical stability. Branched side chains (2-hexyldecyl) disfavor the formation of lamellar mesophases and, instead, induce higher ordered soft crystal phases. No liquid crystal phases but soft crystal phases are observed for the analogous di- and tetracationic compounds without an ion sheltering interlocked macrocycle (dumbbells).
Chemistry: A European Journal | 2010
David A. Tramontozzi; Natalie Suhan; S. Holger Eichhorn; Stephen J. Loeb
Fréchet-type dendrons (G0-G3) were added as both axle stoppering units and cyclic wheel appendages in a series of [2]rotaxanes, [3]rotaxanes, and molecular shuttles that employ 1,2-bis(pyridinium)ethane axles and 24-membered crown ethers wheels. The addition of dendrimer wedges as stoppering units dramatically increased the solubility of simple [2]rotaxanes in nonpolar solvents. The X-ray structure of a G1-stoppered [2]rotaxane shows how the dendritic units affect the structure of the interlocked components. Increased solubility allows observation of how the interaction of dendritic units on separate components in interlocked molecules influences switching properties and molecular size. In a series of [2]rotaxane molecular shuttles incorporating two recognition sites, it was demonstrated that an increase in generation on either the stoppering unit or cyclic wheel could influence both the rate of shuttling and the site preference of the wheel on the axle.
Chemical Communications | 2011
Natalie Suhan; Laura Allen; Mireille T. Gharib; Elizabeth Viljoen; Sarah J. Vella; Stephen J. Loeb
European Journal of Organic Chemistry | 2011
Darren J. Mercer; Sarah J. Vella; Lianne Guertin; Natalie Suhan; Jorge Tiburcio; V. Nicholas Vukotic; James A. Wisner; Stephen J. Loeb
Advanced Functional Materials | 2016
Akhil Vohra; Heather L. Filiatrault; Stanley D. Amyotte; R. Stephen Carmichael; Natalie Suhan; Conrad Siegers; Lorenzo Ferrari; Gregory J. E. Davidson; Tricia Breen Carmichael
Journal of Applied Polymer Science | 2015
Qiuquan Guo; Maxim Paliy; Brad Kobe; Tomas Trebicky; Natalie Suhan; Gilles J. Arsenault; Lorenzo Ferrari; Jun Yang
Journal of Applied Polymer Science | 2016
Maxim Paliy; Tomas Trebicky; Qiuquan Guo; Brad Kobe; Natalie Suhan; Gilles J. Arsenault; Lorenzo Ferrari; Jun Yang
Advanced Functional Materials | 2016
Akhil Vohra; Heather L. Filiatrault; Stanley D. Amyotte; R. Stephen Carmichael; Natalie Suhan; Conrad Siegers; Lorenzo Ferrari; Gregory J. E. Davidson; Tricia Breen Carmichael
Archive | 2013
Tricia Breen Carmichael; Akhil Vohra; Lorenzo Ferrari; Natalie Suhan
Archive | 2013
Lorenzo Ferrari; Natalie Suhan; Tricia Breen Carmichael; Conrad Siegers