scholarly journals Phase Transitions and Crystal Structures of Ionic Plastic Crystals Comprising Quaternary Ammonium Cations and Carborane Anion

2019 ◽  
Vol 48 (8) ◽  
pp. 859-862 ◽  
Author(s):  
Hironori Kimata ◽  
Ryo Sumitani ◽  
Tomoyuki Mochida
Keyword(s):  
Phase Transitions ◽  
Crystal Structures ◽  
Quaternary Ammonium ◽  
Plastic Crystals ◽  
Quaternary Ammonium Cations

scholarly journals Paramagnetic ionic plastic crystals containing the octamethylferrocenium cation: counteranion dependence of phase transitions and crystal structures

2018 ◽  
Vol 20 (5) ◽  
pp. 3019-3028 ◽  
Author(s):  
Tomoyuki Mochida ◽  
Mai Ishida ◽  
Takumi Tominaga ◽  
Kazuyuki Takahashi ◽  
Takahiro Sakurai ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Crystal Structures ◽  
Room Temperature ◽  
Plastic Crystals

Octamethylferrocenium salts with various anions exhibit paramagnetic plastic phases at or above room temperature.

scholarly journals Phase Transitions, Crystal Structures, and Magnetic Properties of Ferrocenium Ionic Plastic Crystals with CF3 BF3 and Other Anions

2019 ◽  
Vol 4 (4) ◽  
pp. 1410-1415 ◽  
Author(s):  
Hironori Kimata ◽  
Takahiro Sakurai ◽  
Hitoshi Ohta ◽  
Tomoyuki Mochida
Keyword(s):  
Magnetic Properties ◽  
Phase Transitions ◽  
Crystal Structures ◽  
Plastic Crystals

scholarly journals Crystal Structures and Phase Sequences of Metallocenium Salts with Fluorinated Anions: Effects of Molecular Size and Symmetry on Phase Transitions to Ionic Plastic Crystals

2016 ◽  
Vol 22 (44) ◽  
pp. 15725-15732 ◽  
Author(s):  
Tomoyuki Mochida ◽  
Yusuke Funasako ◽  
Mai Ishida ◽  
Shingo Saruta ◽  
Takashi Kosone ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Crystal Structures ◽  
Molecular Size ◽  
Plastic Crystals

scholarly journals Rational Design of Molecularly Imprinted Polymers Using Quaternary Ammonium Cations for Glyphosate Detection

Sensors ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 296
Author(s):  
Mashaalah Zarejousheghani ◽  
Alaa Jaafar ◽  
Hendrik Wollmerstaedt ◽  
Parvaneh Rahimi ◽  
Helko Borsdorf ◽  
...  
Keyword(s):  
Molecularly Imprinted Polymers ◽  
Quaternary Ammonium ◽  
Photoelectron Spectroscopy ◽  
Rational Design ◽  
Water Soluble ◽  
Trimethylammonium Chloride ◽  
Molecularly Imprinted ◽  
Functional Monomers ◽  
Imprinted Polymers ◽  
Quaternary Ammonium Cations

Molecularly imprinted polymers have emerged as cost-effective and rugged artificial selective sorbents for combination with different sensors. In this study, quaternary ammonium cations, as functional monomers, were systematically evaluated to design imprinted polymers for glyphosate as an important model compound for electrically charged and highly water-soluble chemical compounds. To this aim, a small pool of monomers were used including (3-acrylamidopropyl)trimethylammonium chloride, [2-(acryloyloxy)ethyl]trimethylammonium chloride, and diallyldimethylammonium chloride. The simultaneous interactions between three positively charged monomers and glyphosate were preliminary evaluated using statistical design of the experiment method. Afterwards, different polymers were synthesized at the gold surface of the quartz crystal microbalance sensor using optimized and not optimized glyphosate-monomers ratios. All synthesized polymers were characterized using atomic force microscopy, contact angle, Fourier-transform infrared, and X-ray photoelectron spectroscopy. Evaluated functional monomers showed promise as highly efficient functional monomers, when they are used together and at the optimized ratio, as predicted by the statistical method. Obtained results from the modified sensors were used to develop a simple model describing the binding characteristics at the surface of the different synthesized polymers. This model helps to develop new synthesis strategies for rational design of the highly selective imprinted polymers and to use as a sensing platform for water soluble and polar targets.

scholarly journals Self-Assembly of Shape-Tunable Oblate Colloidal Particles into Orientationally Ordered Crystals, Glassy Crystals and Plastic Crystals

Soft Matter ◽  
2021 ◽  
Author(s):  
Jiawei Lu ◽  
Xiangyu Bu ◽  
Xinghua Zhang ◽  
Bing Liu
Keyword(s):  
Crystal Structures ◽  
Self Assembly ◽  
Colloidal Particles ◽  
Building Blocks ◽  
Fundamental Question ◽  
The Self ◽  
Plastic Crystals ◽  
Self Assembled ◽  
Glassy Crystals ◽  
The Relationship

The shapes of colloidal particles are crucial to the self-assembled superstructures. Understanding the relationship between the shapes of building blocks and the resulting crystal structures is an important fundamental question....

scholarly journals Crystal structures of three newN-halomethylated quaternary ammonium salts

2015 ◽  
Vol 71 (10) ◽  
pp. 1230-1235
Author(s):  
Carolina Múnera-Orozco ◽  
Rogelio Ocampo-Cardona ◽  
David L. Cedeño ◽  
Rubén A. Toscano ◽  
Luz Amalia Ríos-Vásquez
Keyword(s):  
Crystal Structures ◽  
Intermolecular Interactions ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Compound I ◽  
Nlo Properties ◽  
Π Interactions

In the crystals of the titleN-halomethylated quaternary ammonium salts, C19H23IN+·I−, (I) [systematic name:N-(4,4-diphenylbut-3-en-1-yl)-N-iodomethyl-N,N-dimethylammonium iodide], C20H25IN+·I−, (II) [systematic name:N-(5,5-diphenylpent-4-en-1-yl)-N-iodomethyl-N,N-dimethylammonium iodide], and C21H27IN+·I−, (III) [systematic name:N-(6,6-diphenylhex-5-en-1-yl)-N-iodomethyl-N,N-dimethylammonium iodide], there are short I...I−interactions of 3.564 (4), 3.506 (1) and 3.557 (1) Å for compounds (I), (II) and (III), respectively. Compound (I) crystallizes in the Sohncke groupP21as an `enantiopure' compound and is therefore a potential material for NLO properties. In the crystal of compound (I), molecules are linked by C—H...I−and C—H...π interactions which, together with the I...I−interactions, lead to the formation of ribbons along [100]. In (II), there are only C—H...I−interactions which, together with the I...I−interactions, lead to the formation of helices along [010]. In (III), apart from the I...I−interactions, there are no significant intermolecular interactions present.

Sign in / Sign up

Export Citation Format

Share Document