Results 11 to 20 of about 5,195 (200)

Rotaxane Formation under Thermodynamic Control

, 2016
Thermodynamic control operates in the synthesis of a [2]rotaxane based upon the dibenzylammonium ion/crown ether recognition motif. When dibenzo[24]crown-8 is added to an acetonitrile solution containing a diimine dumbbell-like component, the dynamic ...
Stuart J. Rowan (1535368), Stuart J. Cantrill (2490490), J. Fraser Stoddart (547860)   +2 more
core   +14 more sources

A Mechanical Planar Chiral Rotaxane Induces Single-Handed Helicity in a Twisted Perylene Diimide. [PDF]

Angew Chem Int Ed Engl
A mechanical planar chiral rotaxane (Rmp) is used to induce single‐handed helical chirality (M) in a perylene diimide chromophore, resulting in persistent circular dichroism (CD) and circularly polarised luminescence (CPL). ABSTRACT The twisting of chromophores such as perylene diimides (PDIs) into helical structures affords chiroptical properties from
Lawson TE, Hartmann D, Krimovs A, Sun Q, Pal R, Barendt TA.   +5 more
europepmc   +3 more sources

Dual stimuli-responsive rotaxane-branched dendrimers with reversible dimension modulation

Nature Communications, 2018
Mechanically interlocked molecules are extensively applied as artificial molecular machines but rotaxane-branched dendrimers are rarely explored because of synthetic challenges.
Xu-Qing Wang, Wei Wang, Wei-Jian Li, Li-Jun Chen, Rui Yao, Guang-Qiang Yin, Yu-Xuan Wang, Ying Zhang, Junlin Huang, Hongwei Tan, Yihua Yu, Xiaopeng Li, Lin Xu, Hai-Bo Yang   +13 more
doaj   +2 more sources

Force-Induced Control of Circularly Polarized Luminescence With Rotaxane Architecture. [PDF]

Angew Chem Int Ed Engl
Force‐induced reversible on/off switching of circularly polarized luminescence is achieved with a rotaxane‐based supramolecular mechanophore. The mechanophore, featuring a chiral helicene luminophore, is incorporated as a first network cross‐linker into a double‐network organogel.
Nonaka K, Kuroda T, Masuda K, Nishitani T, Enokido M, Tsurui M, Kitagawa Y, Hasegawa Y, Noguchi K, Nakano K, Sagara Y.   +10 more
europepmc   +3 more sources

Rotaxane-Based Mechanophores Enable Polymers with Mechanically Switchable White Photoluminescence

, 2019
Three mechanoresponsive polyurethane elastomers whose blue, green, and orange photoluminescence can be reversibly turned on by mechanical force were prepared and combined to create a blend that exhibits deformation-induced white photoluminescence.
Marc Karman (4795059), Atsushi Seki (6629732), Yoshimitsu Sagara (1831909), Nobuyuki Tamaoki (1281180), Christoph Weder (1314585), Mehboobali Pannipara (6629735)   +5 more
core   +6 more sources

Mechanically Interlocked Molecules: A Supramolecular Computational Picture of Rotaxane-Based Switches, Shuttles, and Tristable Devices in Solution. [PDF]

ChemistryOpen
This contribution highlights recent studies focused on mechanically interlocked molecules. By combining density functional theory‐converged wavefunctions with highly effective real‐space algorithms for visualizing and quantifying covalent bonds and noncovalent interactions, a first‐principles description of the driving forces governing molecular motion,
Zazza C.
europepmc   +2 more sources

Hydroxy groups enhance [2]rotaxane anion binding selectivity [PDF]

, 2022
We report the synthesis of two [2]rotaxanes containing an interlocked three dimensional binding cavity formed from a pyridinium bis(amide) axle component containing two phenol donors, and an isophthalamide based macrocycle.
Andrew, Docker, Megan, O\u27Mara, Rosemary, Goodwin, Heather, Aitken, Hugo, MacDermott-Opeskin, Nicholas, White, Paul, Beer   +6 more
core   +2 more sources

Synthesis of a [2]rotaxane through first- and second-sphere coordination [PDF]

, 2006
In an effort to expand the application of a new template from interpenetrated to interlocked molecular species, we report the synthesis of a new [2]rotaxane by means of both first- and second-sphere coordination of a palladium(II) dichloride ...
Wisner, James A., Blight, Barry A., Jennings, Michael C.   +2 more
core   +1 more source

Rotaxane-based transition metal complexes: Effect of the mechanical bond on structure and electronic properties [PDF]

, 2018
Early work by Sauvage revealed that mechanical bonding alters the stability and redox properties of their original catenane metal complexes. However, despite the importance of controlling metal ion properties for a range of applications, these effects ...
Kaur, A, Lewis, James E.M., Zhihui Zhang, Stephen M. Goldup, Kaur, Amanpreet, Jonathan A. Kitchen (1645219), Amanpreet Kaur, Kitchen, JA, James E. M. Lewis, Stephen M. Goldup (1300062), Amanpreet Kaur (539697), Jonathan A. Kitchen, Goldup, Stephen M, Roessler, MM, Maxie M. Roessler, Maxie M. Roessler (1361220), Lewis, James EM, Zhihui Zhang (325243), Goldup, Stephen M., Kitchen, Jonathan A., Martina Cirulli (6169238), Cirulli, M, Zhang, Z, Goldup, Stephen M.; id_orcid, Roessler, Maxie M., James E. M. Lewis (2566354), Zhang, Zhihui, Lewis, JEM, Goldup, SM, Roessler, Maxie M, Cirulli, Martina, Lewis, James E.M.; id_orcid, Kitchen, Jonathan A, Martina Cirulli   +33 more
core   +1 more source

Ring-Over-Ring Deslipping From Imine-Bridged Heterorotaxanes

Frontiers in Chemistry, 2022
Ring-over-ring slippage and ring-through-ring penetration are important processes in the construction of ring-in-ring multiple interlocked architectures.
Sayaka Hoshino, Kosuke Ono, Hidetoshi Kawai   +2 more
doaj   +1 more source