Results 31 to 40 of about 603,136 (280)

Unraveling chirality transfer mechanism by structural isomer-derived hydrogen bonding interaction in 2D chiral perovskite

open access: yesNature Communications, 2023
In principle, the induced chirality of hybrid perovskites results from symmetry-breaking within inorganic frameworks. However, the detailed mechanism behind the chirality transfer remains unknown due to the lack of systematic studies.
Jaehyun Son   +11 more
doaj   +1 more source

Structure of Simple Dipolar Water-Like Fluids: Primitive Model and Hard Tetrahedra

open access: yesFrontiers in Chemistry, 2021
Dipolar versions of two qualitatively different types of simple short range model fluids which exhibit the phenomenon of hydrogen bonding and which could thus serve as a reference in equations of state for associating fluids have been considered: the ...
I. Nezbeda, I. Nezbeda
doaj   +1 more source

Tetraammonium Tetrametaphosphimate Tetrahydrate [PDF]

open access: yes, 1998
The tetrametaphosphimate ring in the title compound, (NH4)4+(PO2NH)4-.4H2O exhibits a chair conformation. The tetrametaphosphimate rings are linked by N-HO bonds forming columns along [100].
Schnick, Wolfgang, Stock, Norbert
core   +1 more source

Thermogravimetry and neutron thermodiffractometry studies of the H-YBa2Cu3O7 system. [PDF]

open access: yes, 1990
The high Tc superconducting oxide YBa2Cu3O7¿x reacts with hydrogen gas. Thermogravimetric, X-ray and neutron scattering experiments allow us to propose a two-step type of hydrogen bonding.
Blank, D.H.A.   +8 more
core   +2 more sources

The statistical mechanics of the two-dimensional hydrogen-bonding self-avoiding walk including solvent effects

open access: yes, 2007
A two-dimensional square-lattice model for the formation of secondary structures in proteins, the hydrogen-bonding model, is extended to include the effects of solvent quality.
Foster, D P, Pinettes, C
core   +2 more sources

Long distance ion-water interactions in aqueous sulfate nanodrops persist to ambient temperatures in the upper atmosphere. [PDF]

open access: yes, 2018
The effect of temperature on the patterning of water molecules located remotely from a single SO42- ion in aqueous nanodrops was investigated for nanodrops containing between 30 and 55 water molecules using instrument temperatures between 135 and 360 K ...
DiTucci, Matthew J   +2 more
core   +2 more sources

Benzylammonium 2,4-bis(dicyanomethylene)-2,3-dihydroisoindolide [PDF]

open access: yes, 2005
The cation and anion of the title salt, C⁷H₁₀N⁺.C₁₄H₄N₅-, are both bisected by a crystallographic mirror plane.
Conway, Shane P.   +3 more
core   +1 more source

Microbial exopolysaccharide production by polyextremophiles in the adaptation to multiple extremes

open access: yesFEBS Letters, EarlyView.
Polyextremophiles are microorganisms that endure multiple extreme conditions by various adaptation strategies that also include the production of exopolysaccharides (EPSs). This review provides an integrated perspective on EPS biosynthesis, function, and regulation in these organisms, emphasizing their critical role in survival and highlighting their ...
Tracey M Gloster, Ebru Toksoy Öner
wiley   +1 more source

Special Issue: Intramolecular Hydrogen Bonding

open access: yesMolecules, 2014
Intramolecular hydrogen bonds play critical structure- and function-serving roles in biological and synthetic molecular systems. This special issue, through eight contributions, showcases the prominence of these non-covalent interactions within several ...
Ronald K. Castellano
doaj   +1 more source

Tris(hydroxypropyl)phosphine Oxide: A Chiral Three-Dimensional Material with Nonlinear Optical Properties [PDF]

open access: yes, 2010
The achiral C_(3v) organic phosphine tris(hydroxypropyl)phosphine oxide (1) crystallizes in the unusual chiral hexagonal space group P6_3. The structure is highly ordered because each phosphine oxide moiety forms three hydrogen bonds with adjacent ...
Durrell, Alec C.   +5 more
core   +2 more sources

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