scholarly journals Negative area compressibility of a hydrogen-bonded two-dimensional material

2019 ◽  
Vol 10 (5) ◽  
pp. 1309-1315 ◽  
Author(s):  
Guoqiang Feng ◽  
Wei-Xiong Zhang ◽  
Liyuan Dong ◽  
Wei Li ◽  
Weizhao Cai ◽  
...  
Keyword(s):  
Pressure Sensors ◽  
Two Dimensional ◽  
Sensors And Actuators ◽  
Rare Phenomenon ◽  
Hydrogen Bonded

Very few materials expand two-dimensionally under pressure, and this extremely rare phenomenon, namely negative area compressibility (NAC), is highly desirable for technological applications in pressure sensors and actuators.

Hydrogen-bonding networks of purine derivatives and their bilayers for guest intercalation

CrystEngComm ◽  
2016 ◽  
Vol 18 (1) ◽  
pp. 62-67
Author(s):  
Yoona Jang ◽  
Seo Yeon Yoo ◽  
Hye Rin Gu ◽  
Yu Jin Lee ◽  
Young Shin Cha ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Two Dimensional ◽  
Purine Derivatives ◽  
Guest Molecules ◽  
Π Interactions ◽  
Hydrogen Bonding Networks ◽  
Hydrogen Bonded

6-Chloro-9-propyl-purin-2-amine (pr-GCl) forms two-dimensional hydrogen-bonded networks which in turn stack via π–π interactions, leading to the formation of bilayers that can accommodate organic guest molecules.

Structural study of six cycloalkylammonium cinnamate salt structures featuring one-dimensional columns and two-dimensional hydrogen-bonded networks

2012 ◽  
Vol 68 (5) ◽  
pp. o188-o194 ◽  
Author(s):  
Andreas Lemmerer ◽  
Manuel A. Fernandes
Keyword(s):  
Hydrogen Bonds ◽  
Structural Study ◽  
Two Dimensional ◽  
One Dimensional ◽  
Dimensional Network ◽  
Polymorphic Forms ◽  
Whole Molecule Disorder ◽  
Hydrogen Bonded

Six ammonium carboxylate salts, namely cyclopentylammonium cinnamate, C5H12N+·C9H7O2−, (I), cyclohexylammonium cinnamate, C6H14N+·C9H7O2−, (II), cycloheptylammonium cinnamate form I, C7H16N+·C9H7O2−, (IIIa), and form II, (IIIb), cyclooctylammonium cinnamate, C8H18N+·C9H7O2−, (IV), and cyclododecylammonium cinnamate, C12H26N+·C9H7O2−, (V), are reported. Salts (II)–(V) all have a 1:1 ratio of cation to anion and feature three N+—H...O−hydrogen bonds forming one-dimensional hydrogen-bonded columns consisting of repeatingR43(10) rings, while salt (I) has a two-dimensional network made up of alternatingR44(12) andR68(20) rings. Salt (III) consists of two polymorphic forms,viz.form I havingZ′ = 1 and form II withZ′ = 2. The latter polymorph has disorder of the cycloheptane rings in the two cations, as well as whole-molecule disorder of one of the cinnamate anions. A similar, but ordered,Z′ = 2 structure is seen in salt (IV).

Hydrogen-bonded two-dimensional sheet construction in the 1∶1 adduct between 2-cyanoguanidine and 2-(N-cyano)imino-4,6-dimethylpyrimidine

CrystEngComm ◽  
2002 ◽  
Vol 4 (94) ◽  
pp. 568-573 ◽  
Author(s):  
Daniel J. Quinlan ◽  
Alexander J. Blake ◽  
Peter Hubberstey
Keyword(s):  
Two Dimensional ◽  
Hydrogen Bonded

Relaxations of Hydrogen-Bonded Liquids Confined in Two-Dimensional Vermiculite Clay

2004 ◽  
Vol 108 (31) ◽  
pp. 11596-11603 ◽  
Author(s):  
Silvina Cerveny ◽  
Johan Mattsson ◽  
Jan Swenson ◽  
Rikard Bergman
Keyword(s):  
Two Dimensional ◽  
Vermiculite Clay ◽  
Hydrogen Bonded

Polymorphs of phenazine hexacyanoferrate(II) hydrate: supramolecular isomerism in a 2D hydrogen-bonded network

2021 ◽  
Vol 77 (2) ◽  
pp. 211-218
Author(s):  
Ivica Cvrtila ◽  
Vladimir Stilinović
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Crystal Structures ◽  
The Other ◽  
Two Dimensional ◽  
Structural Motifs ◽  
Supramolecular Isomerism ◽  
Other Hand ◽  
Π Stacking ◽  
Hydrogen Bonded

The crystal structures of two polymorphs of a phenazine hexacyanoferrate(II) salt/cocrystal, with the formula (Hphen)3[H2Fe(CN)6][H3Fe(CN)6]·2(phen)·2H2O, are reported. The polymorphs are comprised of (Hphen)2[H2Fe(CN)6] trimers and (Hphen)[(phen)2(H2O)2][H3Fe(CN)6] hexamers connected into two-dimensional (2D) hydrogen-bonded networks through strong hydrogen bonds between the [H2Fe(CN)6]2− and [H3Fe(CN)6]− anions. The layers are further connected by hydrogen bonds, as well as through π–π stacking of phenazine moieties. Aside from the identical 2D hydrogen-bonded networks, the two polymorphs share phenazine stacks comprising both protonated and neutral phenazine molecules. On the other hand, the polymorphs differ in the conformation, placement and orientation of the hydrogen-bonded trimers and hexamers within the hydrogen-bonded networks, which leads to different packing of the hydrogen-bonded layers, as well as to different hydrogen bonding between the layers. Thus, aside from an exceptional number of symmetry-independent units (nine in total), these two polymorphs show how robust structural motifs, such as charge-assisted hydrogen bonding or π-stacking, allow for different arrangements of the supramolecular units, resulting in polymorphism.

Two-dimensional hydrogen-bonded networks in two novel glycoluril derivatives

2008 ◽  
Vol 64 (2) ◽  
pp. o69-o72 ◽  
Author(s):  
Li-Ping Cao ◽  
Xiang-Gao Meng ◽  
Meng Gao ◽  
Neng-Fang She ◽  
An-Xin Wu
Keyword(s):  
Two Dimensional ◽  
Hydrogen Bonded

scholarly journals van der Waals-Induced Chromatic Shifts in Hydrogen-Bonded Two-Dimensional Porphyrin Arrays on Boron Nitride

ACS Nano ◽  
2015 ◽  
Vol 9 (10) ◽  
pp. 10347-10355 ◽  
Author(s):  
Vladimir V. Korolkov ◽  
Simon A. Svatek ◽  
Alex Summerfield ◽  
James Kerfoot ◽  
Lixu Yang ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Van Der Waals ◽  
Two Dimensional ◽  
Hydrogen Bonded
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