Peculiar hydrogen bonding behaviour of water molecules inside the aqueous nanochannels of lyotropic liquid crystals

2020 ◽  
Vol 22 (11) ◽  
pp. 6210-6221
Author(s):  
Konoya Das ◽  
Subrahmanyam Sappati ◽  
Partha Hazra
Keyword(s):  
Hydrogen Bonding ◽  
Liquid Crystals ◽  
Hydrogen Bonds ◽  
Lyotropic Liquid Crystals ◽  
Water Molecules ◽  
Probe Molecules ◽  
Intramolecular Hydrogen Bonds ◽  
Target Probe ◽  
Intramolecular Hydrogen

The hydrogen bonding abilities of the LLC water molecules and their effects on intramolecular hydrogen bonds of the target probe molecules.

N-(7-Dimethoxymethyl-4-oxo-3,4-dihydropteridin-2-yl)-2,2-dimethylpropionamide monohydrate

2007 ◽  
Vol 63 (11) ◽  
pp. o4249-o4250
Author(s):  
Hoong-Kun Fun ◽  
Shyamaprosad Goswami ◽  
Annada C. Maity ◽  
Sibaprasad Maity ◽  
Suchada Chantrapromma
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Ring System ◽  
Water Molecules ◽  
Two Dimensional ◽  
Compound C ◽  
The Mean ◽  
Intramolecular Hydrogen ◽  
Ring Motif

In the title compound, C14H19N5O4·H2O, the 3,4-dihydropteridine ring system deviates sigificantly from planarity, the dihedral angle between the mean planes of the two rings being 3.93 (9)°. Intramolecular N—H...O hydrogen bonding generates an S(6) ring motif. The water molecule forms O—H...O and O—H...N intramolecular hydrogen bonds with the substituted pteridine molecule. In the crystal structure, the substituted pteridine molecules are linked by N—H...N hydrogen bonds into chains running along the c direction. These chains are further connected to the water molecules by N—H...O, O—H...O and O—H...N hydrogen bonds to form two-dimensional networks parallel to the bc plane. The crystal structure is stabilized by intra- and intermolecular N—H...O, N—H...N, O—H...O and O—H...N hydrogen bonds, together with weak C—H...O and C—H...N intra- and intermolecular interactions. C—H...π interactions are also observed.

Dirubidium hexaaquacobalt(II) tetrakis(hydrogen phthalate) tetrahydrate and coordination modes of the hydrogen phthalate anion

2013 ◽  
Vol 69 (8) ◽  
pp. 841-846 ◽  
Author(s):  
Dejan Poleti ◽  
Jelena Rogan
Keyword(s):  
Hydrogen Bonds ◽  
Crystal Packing ◽  
Outer Part ◽  
Water Molecules ◽  
Hydrogen Phthalate ◽  
Aromatic Rings ◽  
Intramolecular Hydrogen Bonds ◽  
Coordination Modes ◽  
Bonding Interaction ◽  
Intramolecular Hydrogen

The title compound, Rb2[Co(H2O)6](C8H5O4)4·4H2O, consists of nearly regular octahedral [Co(H2O)6]2+cations with the CoIIcations on the inversion centre (special position 2a), Rb+cations, hydrogen phthalate (Hpht−) anions and disordered water molecules. The Rb+cation is surrounded by nine O atoms from Hpht−anions and water molecules, with a strongly deformed pentagonal–bipyramidal geometry and one apex split into three positions. The crystal packing is governed by numerous hydrogen bonds involving all water molecules and Hpht−anions. In this way, layers parallel to theabplane are formed, with the aromatic rings of the Hpht−anions esentially directed along thecaxis. While Hpht−anions form the outer part of the layers, disordered water molecules and Rb+cations alternate with [Co(H2O)6]2+cations in the inner parts. The only interactions between the layers are van der Waals forces between the atoms of the aromatic rings. A search of the Cambridge Structural Database for coordination modes and types of hydrogen-bonding interaction of the Hpht−anion showed that, when uncoordinated Hpht−anions are present, compounds with intermolecular hydrogen bonds are more numerous than compounds with intramolecular hydrogen bonds. For coordinated Hpht−anions, chelating and bridging anions are almost equally common, while monodentate anions are relatively scarce. The same coordination modes appear for Hpht−anions with or without intramolecular hydrogen bonds, although intramolecular hydrogen bonds are less common.

Influence of a hydrodynamic environment on chain rigidity, liquid crystallinity, absorptivity, and photoluminescence of hydrogen-bonding-assisted helical poly(phenylacetylene)

RSC Advances ◽  
2016 ◽  
Vol 6 (43) ◽  
pp. 36661-36666 ◽  
Author(s):  
Young-Jae Jin ◽  
Hyojin Kim ◽  
Mari Miyata ◽  
Guanwu Yin ◽  
Takashi Kaneko ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Conformational Changes ◽  
Liquid Crystallinity ◽  
Intramolecular Hydrogen Bonds ◽  
Chain Rigidity ◽  
Intramolecular Hydrogen ◽  
Hydrodynamic Environment

The chain rigidity, liquid crystallinity, absorptivity, and photoluminescence of a helical poly(phenylacetylene) derivative varied significantly depending on the solvent, owing to the conformational changes based on intramolecular hydrogen bonds.

SPECTROSCOPIC STUDIES OF ALCOHOLS: VI. INTRAMOLECULAR HYDROGEN BONDS IN ETHANOLAMINE AND ITS O- AND N-METHYL DERIVATIVES

1965 ◽  
Vol 43 (11) ◽  
pp. 2970-2977 ◽  
Author(s):  
P. J. Krueger ◽  
H. D. Mettee
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Temperature Dependence ◽  
Spectroscopic Studies ◽  
Intramolecular Hydrogen Bonds ◽  
Distinct Band ◽  
Conformational Equilibria ◽  
Methyl Derivatives ◽  
Intramolecular Hydrogen

The competitive intramolecular [Formula: see text] hydrogen bonding in ethanolamine and N-methylethanolamine has been studied in dilute C2Cl4 solution by means of the temperature dependence of the fundamental OH and NH stretching bands. Of the three conformers identified for each of these compounds, the least stable shows a distinct band which is assigned to a "terminal" OH group involved in an intramolecular [Formula: see text] hydrogen bond. Enthalpy differences between conformers are reported and discussed, and compared with those found for the conformational equilibria in 2-methoxyethylamine and N,N-dimethyl-ethanolamine.

scholarly journals X-ray evidence for metal–N-7 bonding in a hydrated manganese derivative of guanosine 5′-monophosphate

1974 ◽  
Vol 139 (3) ◽  
pp. 791-792 ◽  
Author(s):  
Patrice de Meester ◽  
David M. L. Goodgame ◽  
T. Jeffrey Jones ◽  
Andrzej C. Skapski
Keyword(s):  
Hydrogen Bonds ◽  
Single Crystal ◽  
Manganese Atom ◽  
Metal Phosphate ◽  
Water Molecules ◽  
Intramolecular Hydrogen Bonds ◽  
X Ray ◽  
Nucleotide Base ◽  
Phosphate Bonding ◽  
Intramolecular Hydrogen

Single-crystal X-ray studies of a manganese(II) derivative of guanosine 5′-monophosphate, [Mn(5′-GMP)(H2O)5],3H2O, have shown that it is isostructural with its nickel analogue. The manganese atom therefore is bonded to five water molecules with the remaining octahedral co-ordination site being occupied by N-7 of the nucleotide base. No direct metal–phosphate bonding is involved, but there are structure-stabilizing intramolecular hydrogen bonds between two phosphate oxygen atoms and co-ordinated water molecules.

Sign in / Sign up

Export Citation Format

Share Document