Structure and gas sorption properties of an aromatic polyamide with long alkyl side chains

2005 ◽  
Vol 97 (5) ◽  
pp. 1771-1775 ◽  
Author(s):  
H. Takashima ◽  
S. Okamoto ◽  
H. Yoshimizu ◽  
Y. Tsujita
Keyword(s):  
Aromatic Polyamide ◽  
Sorption Properties ◽  
Side Chains ◽  
Gas Sorption ◽  
Alkyl Side Chains

scholarly journals Synthesis of New Derivatives of BEDT-TTF: Installation of Alkyl, Ethynyl, and Metal-Binding Side Chains and Formation of Tris(BEDT-TTF) Systems

2021 ◽  
Vol 7 (8) ◽  
pp. 110
Author(s):  
Songjie Yang ◽  
Matteo Zecchini ◽  
Andrew Brooks ◽  
Sara Krivickas ◽  
Desiree Dalligos ◽  
...  
Keyword(s):  
Metal Binding ◽  
Tricarboxylic Acid ◽  
Metal Salts ◽  
Side Chain ◽  
Side Chains ◽  
Ethynyl Group ◽  
X Ray ◽  
Transition Metal Salts ◽  
Alkyl Side Chains ◽  
Derivatives Of

The syntheses of new BEDT-TTF derivatives are described. These comprise BEDT-TTF with one ethynyl group (HC≡C-), with two (n-heptyl) or four (n-butyl) alkyl side chains, with two trans acetal (-CH(OMe)2) groups, with two trans aminomethyl (-CH2NH2) groups, and with an iminodiacetate (-CH2N(CH2CO2−)2 side chain. Three transition metal salts have been prepared from the latter donor, and their magnetic properties are reported. Three tris-donor systems are reported bearing three BEDT-TTF derivatives with ester links to a core derived from benzene-1,3,5-tricarboxylic acid. The stereochemistry and molecular structure of the donors are discussed. X-ray crystal structures of two BEDT-TTF donors are reported: one with two CH(OMe)2 groups and with one a -CH2N(CH2CO2Me)2 side chain.

scholarly journals Chemical modification of the polymer of intrinsic microporosity PIM-1 for enhanced hydrogen storage

Adsorption ◽  
2020 ◽  
Vol 26 (7) ◽  
pp. 1083-1091
Author(s):  
Mi Tian ◽  
Sébastien Rochat ◽  
Hamish Fawcett ◽  
Andrew D. Burrows ◽  
Christopher R. Bowen ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Surface Area ◽  
Hydrogen Adsorption ◽  
Sorption Properties ◽  
Bet Surface Area ◽  
Polymer Modification ◽  
Gas Sorption ◽  
Chemically Modified ◽  
Polymer Of Intrinsic Microporosity ◽  
Intrinsic Microporosity

Abstract A detailed investigation has been carried out of the pre-polymerisation modification of the polymer of intrinsic microporosity PIM-1 by the addition of two methyl (Me) groups to its spirobisindane unit to create a new chemically modified PIM-1 analogue, termed MePIM. Our work explores the effects of this modification on the porosity of PIM-1 and hence on its gas sorption properties. MePIM was successfully synthesised using either low (338 K) or high (423 K) temperature syntheses. It was observed that introduction of methyl groups to the spirobisindane part of PIM-1 generates additional microporous spaces, which significantly increases both surface area and hydrogen storage capacity. The BET surface area (N2 at 77 K) was increased by ~ 12.5%, resulting in a ~ 25% increase of hydrogen adsorption after modification. MePIM also maintains the advantages of good processability and thermal stability. This work provides new insights on a facile polymer modification that enables enhanced gas sorption properties.

Syntheses, structures and gas sorption properties of two coordination polymers with a unique type of supramolecular isomerism

2015 ◽  
Vol 2 (2) ◽  
pp. 136-140 ◽  
Author(s):  
Xiao-Lin Qi ◽  
Jia-Wen Ye ◽  
Rui-Biao Lin ◽  
Pei-Qin Liao ◽  
Si-Yang Liu ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Structural Difference ◽  
Sorption Properties ◽  
Gas Sorption ◽  
Unique Type ◽  
Supramolecular Isomerism ◽  
Porous Properties

Two genuine supramolecular isomers with a unique type of structural difference and completely different porous properties have been synthesized and characterized.

scholarly journals Anion-exchange membranes with polycationic alkyl side chains attached via spacer units

2016 ◽  
Vol 4 (43) ◽  
pp. 17138-17153 ◽  
Author(s):  
Hai-Son Dang ◽  
Patric Jannasch
Keyword(s):  
Anion Exchange ◽  
Ion Conductivity ◽  
Side Chains ◽  
Anion Exchange Membranes ◽  
Hydroxide Ion ◽  
Alkaline Stability ◽  
Phenylene Oxide ◽  
Alkyl Side Chains

Poly(phenylene oxide)s carrying pendant polycationic alkyl side chains with a suitable configuration show high hydroxide ion conductivity and excellent alkaline stability.

Impact of alkyl side chains at self-assembly, electronic structure and charge arrangement in sexithiophene thin films

2011 ◽  
Vol 12 (6) ◽  
pp. 903-910 ◽  
Author(s):  
Steffen Duhm ◽  
Qian Xin ◽  
Norbert Koch ◽  
Nobuo Ueno ◽  
Satoshi Kera
Keyword(s):  
Thin Films ◽  
Electronic Structure ◽  
Self Assembly ◽  
Side Chains ◽  
Alkyl Side Chains

Benzotriazole-based donor–acceptor type semiconducting polymers with different alkyl side chains for photovoltaic devices

2013 ◽  
Vol 108 ◽  
pp. 113-125 ◽  
Author(s):  
Ji-Hoon Kim ◽  
Hee Un Kim ◽  
Chang Eun Song ◽  
In-Nam Kang ◽  
Jin-Kyun Lee ◽  
...  
Keyword(s):  
Semiconducting Polymers ◽  
Side Chains ◽  
Photovoltaic Devices ◽  
Alkyl Side Chains ◽  
Donor Acceptor
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