Dithiols as Liquid Crystalline Building Blocks for Smart Polymers via Thiol–yne Click Chemistry

2021 ◽  
Vol 3 (3) ◽  
pp. 1602-1609
Author(s):  
Flavia Lupi ◽  
Daniele Martella ◽  
Sara Nocentini ◽  
Diego Antonioli ◽  
Michele Laus ◽  
...  
Keyword(s):  
Click Chemistry ◽  
Liquid Crystalline ◽  
Building Blocks ◽  
Smart Polymers

Highly regioselective surface acetylation of cellulose and shaped cellulose constructs in the gas-phase

2021 ◽  
Author(s):  
Tetyana Koso ◽  
Marco Beaumont ◽  
Blaise Tardy ◽  
Daniel Rico del Cerro ◽  
Samuel Eyley ◽  
...  
Keyword(s):  
Gas Phase ◽  
Liquid Crystalline ◽  
Computational Modelling ◽  
Building Blocks ◽  
Cellulosic Materials ◽  
Gas Phase Chemistry ◽  
Liquid Crystalline Phases ◽  
Phase Chemistry ◽  
Cholesteric Liquid Crystalline ◽  
Surface Acetylation

Gas-phase acylation of cellulose is an attractive method for modifying the surface properties of cellulosics. However, little is known concerning the regioselectivity of the chemistry, in terms of which cellulose positions are preferentially acylated and if acylation can be restricted to the surface, preserving crystallinities/morphologies. Consequently, we reexplore simple gas-phase acetylation of modern-day cellulosic building blocks – cellulose nanocrystals, pulps, regenerated fibre and aerogels. The gas-phase acetylation is shown to be highly regioselective for the C6-OH, is further supported with computational modelling. This contrasts with liquid-state acetylation, highlighting that the gas-phase chemistry is much more controllable, yet with similar kinetics to the uncatalyzed liquid-phase reactions. Furthermore, this method preserves both the native crystalline structure of cellulose and the supramolecular morphologies of even delicate cellulosic constructs (aerogel exhibiting retention of chiral cholesteric liquid crystalline phases). Therefore, we are convinced that this methodology will lead to more rapid adoption of precisely tailored and cellulosic materials

Cyclopropyl Building Blocks in Organic Synthesis. Part 96. Novel Liquid Crystalline Compounds Containing Bicyclo[3.1.0]hexane Core Units.

ChemInform ◽  
2004 ◽  
Vol 35 (21) ◽  
Author(s):  
Sergei I. Kozhushkov ◽  
Rainer Langer ◽  
Dmitrii S. Yufit ◽  
Judith A. K. Howard ◽  
Heiko Schill ◽  
...  
Keyword(s):  
Organic Synthesis ◽  
Liquid Crystalline ◽  
Building Blocks

Synthesis and properties of a novel family of liquid crystalline building blocks based on 5,5′-substituted-2,2′-bipyridine

1995 ◽  
Vol 18 (1) ◽  
pp. 157-159 ◽  
Author(s):  
Laurent Douce ◽  
Raymond Ziessel ◽  
Rachid Seghrouchni ◽  
Antoine Skoulios ◽  
Eduardo Campillos ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Building Blocks

Luminescent liquid crystalline hybrid materials by embedding octahedral molybdenum cluster anions with soft organic shells derived from tribenzo[18]crown-6

2018 ◽  
Vol 47 (40) ◽  
pp. 14340-14351 ◽  
Author(s):  
Philipp Ehni ◽  
Kevin Guy ◽  
Max Ebert ◽  
Stuart Beardsworth ◽  
Korinna Bader ◽  
...  
Keyword(s):  
Crown Ethers ◽  
Hybrid Materials ◽  
Liquid Crystalline ◽  
Building Blocks ◽  
Cluster Anions ◽  
Supramolecular Materials ◽  
Molybdenum Cluster

Crown ethers and their derivatives are versatile building blocks for the design of supramolecular materials.

The synthesis and characterization of liquid crystalline oligoimides and polyimides

1995 ◽  
Vol 7 (4) ◽  
pp. 421-431 ◽  
Author(s):  
P Alder ◽  
J G Dolden ◽  
P Smith
Keyword(s):  
Liquid Crystalline ◽  
Solution Method ◽  
Molar Mass ◽  
Building Blocks ◽  
Decomposition Temperature ◽  
Synthesis And Characterization ◽  
Scanning Calorimetry ◽  
Nematic Phases ◽  
Optical Polarizing Microscopy

There are few examples of thermotropic polyimides reported in the literature. In the present article the authors report the synthesis and characterization of some novel oligoand poly-imides which exhibit mesogenic behaviour. The solution method of Yamazaki et al (Yamazaki N, Higashi F and Kawasaki J 1974 J. Polym. Sci., Polym. Chem. Ed. 12 2149) for the preparation of polyamides was successfully applied to the formation of imide compounds and oligomers. Liquid crystal phases were characterized by optical polarizing microscopy and by differential scanning calorimetry. Two anhydrides were employed which were considered to be suitable building blocks for preparing potentially mesogenic polyimides, namely biphenyl tetracarboxytic dianhydride and pyromellitic dianhydride. Low-molar-mass materials were first synthesized with monoanhydride units to endcap the chains. using nadic and maleic anhydrides. Nematic phases Awere observed in several nadic diimide compounds containing multicyclic cores and in some low-molar-mass diimides and polyimides which contained a biphenylene unit in conjunction with at least one other unsaturated ring When the nadlmldes were heated above 220 C cross-linking and decomposition occurred with loss of mesogenic properties. A fusible polyimide was synthesized containing a flexible chain which exhibited thermotropic behaviour below its decomposition temperature.

Non-Nucleoside Building Blocks for Copper-Assisted and Copper-Free Click Chemistry for the Efficient Synthesis of RNA Conjugates

2010 ◽  
Vol 12 (23) ◽  
pp. 5410-5413 ◽  
Author(s):  
K. N. Jayaprakash ◽  
Chang Geng Peng ◽  
David Butler ◽  
Jos P. Varghese ◽  
Martin A. Maier ◽  
...  
Keyword(s):  
Click Chemistry ◽  
Building Blocks ◽  
Efficient Synthesis

scholarly journals Synthesis of mono-, di- and triporphyrin building blocks by click chemistry for photodynamic therapy application

Tetrahedron ◽  
2017 ◽  
Vol 73 (5) ◽  
pp. 532-541 ◽  
Author(s):  
Amirah Mohd Gazzali ◽  
Ludovic Colombeau ◽  
Philippe Arnoux ◽  
Habibah A. Wahab ◽  
Céline Frochot ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Click Chemistry ◽  
Building Blocks
Sign in / Sign up

Export Citation Format

Share Document