scholarly journals A study on a telo21 G-quadruplex DNA specific binding ligand: enhancing the molecular recognition ability via the amino group interactions

RSC Advances ◽  
2018 ◽  
Vol 8 (36) ◽  
pp. 20222-20227 ◽  
Author(s):  
Dongli Li ◽  
Jin-Qiang Hou ◽  
Wei Long ◽  
Yu-Jing Lu ◽  
Wing-Leung Wong ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Specific Binding ◽  
Amino Group ◽  
Amino Groups ◽  
Group Interactions ◽  
Quadruplex Dna ◽  
Fluorescent Signal ◽  
Hydrogen Bonding Interactions ◽  
G Quadruplex ◽  
Recognition Ability

A significant fluorescent signal enhancement attributed to hydrogen-bonding interactions through the amino groups of a small binding ligand in the G-quartets (binding energy: −6.2 kcal mol−1).

scholarly journals Correction: A study on a telo21 G-quadruplex DNA specific binding ligand: enhancing the molecular recognition ability via the amino group interactions

RSC Advances ◽  
2018 ◽  
Vol 8 (41) ◽  
pp. 22931-22931
Author(s):  
Dongli Li ◽  
Jin-Qiang Hou ◽  
Wei Long ◽  
Yu-Jing Lu ◽  
Wing-Leung Wong ◽  
...  
Keyword(s):  
Molecular Recognition ◽  
Specific Binding ◽  
Amino Group ◽  
Group Interactions ◽  
Quadruplex Dna ◽  
G Quadruplex ◽  
Recognition Ability

Correction for ‘A study on a telo21 G-quadruplex DNA specific binding ligand: enhancing the molecular recognition ability via the amino group interactions’ by Dongli Li et al., RSC Adv., 2018, 8, 20222–20227.

scholarly journals Crystal structure of 3-benzamido-1-(4-nitrobenzyl)quinolinium trifluoromethanesulfonate

2016 ◽  
Vol 72 (5) ◽  
pp. 747-750
Author(s):  
Mariana Nicolas-Gomez ◽  
Iván J. Bazany-Rodríguez ◽  
Eduardo Plata-Vargas ◽  
Simón Hernández-Ortega ◽  
Alejandro Dorazco-González
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Organic Cations ◽  
Dihedral Angles ◽  
Asymmetric Unit ◽  
Group Interactions ◽  
Compound C ◽  
Hydrogen Bonding Interactions ◽  
Phenyl Rings ◽  
Supramolecular Chains

In the title compound, C23H18N3O3+·CF3SO3−, the asymmetric unit contains two crystallographically independent organic cations with similar conformations. Each cation shows a moderate distortion between the planes of the amide groups and the quinolinium rings with dihedral angles of 14.90 (2) and 31.66 (2)°. The quinolinium and phenyl rings are slightly twisted with respect to each other at dihedral angles of 6.99 (4) and 8.54 (4)°. The trifluoromethanesulfonate anions are linked to the organic cationsviaN—H...O hydrogen-bonding interactions involving the NH amide groups. In the crystal, the organic cations are linked by weak C—H...O(nitro group) interactions into supramolecular chains propagating along theb-axis direction.

A Cationic Copolymer as a Cocatalyst for a Peroxidase-Mimicking Heme-DNAzyme

2021 ◽  
Author(s):  
Haruka Araki ◽  
Shota Hagiwara ◽  
Ryosuke Shinomiya ◽  
Atsuya Momotake ◽  
Hiroaki Kotani ◽  
...  
Keyword(s):  
Amino Groups ◽  
Interpolyelectrolyte Complex ◽  
Quadruplex Dna ◽  
G Quadruplex

Heme binds to a parallel-stranded G-quadruplex DNA to form a peroxidase-mimicking heme-DNAzyme. An interpolyelectrolyte complex between the heme-DNAzyme and a cationic copolymer possessing protonated amino groups was characterized and the...

Intramolecular Hydrogen Bonding in Mononitronaphthylamines

1960 ◽  
Vol 13 (4) ◽  
pp. 456
Author(s):  
A Bryson ◽  
RL Werner
Keyword(s):  
Hydrogen Bonding ◽  
Carbon Tetrachloride ◽  
Intramolecular Hydrogen Bonding ◽  
Amino Group ◽  
Amino Groups ◽  
Solute Interaction ◽  
Intramolecular Hydrogen

The presence of intramolecular hydrogen bonding in 2-nitro-1-naphthylamine, 1-nitro-2-naphthylamine, 3-nitro-2-naphthylamine, and 8-nitro-1-naphthylamine is inferred from a study of the NH frequencies of the 14 isomeric mononitronaphthylamines in the solvents carbon tetrachloride and pyridine. The NH stretching frequencies are decreased in pyridine as a result of hydrogen bonding between the amino group and the solvent. The extent of this decrease is quite uniform for all nitronaphthylamines except those in which the nitro and amino groups are adjacent, and in these cases the decrease is about half that observed from the remaining compounds. This is interpreted as indicating the presence of intramolecular hydrogen bonding in the latter group, the extent of which reduces the degree of solvent-solute interaction.

scholarly journals Crystal structure of poly[bis(μ-2-amino-4,5-dicyanoimidazolato-κ2N1:N3)-trans-bis(N,N′-dimethylformamide-κO)cadmium]

2015 ◽  
Vol 71 (9) ◽  
pp. 1022-1025 ◽  
Author(s):  
Jin-Li Zhu ◽  
Guo -Qing Jiang ◽  
Xiao-Qing Guo ◽  
Yan-Feng Tang ◽  
Miao Wang
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Coordination Polymer ◽  
Equatorial Plane ◽  
Rotation Axis ◽  
Amino Group ◽  
Hydrogen Bonding Interactions ◽  
Primary Amino ◽  
Cyano Groups

In the title structure, [Cd(C5H2N5)2(C3H7NO)2]nor [Cd(adci)2(DMF)2]n, the Cd2+ion is located on a twofold rotation axis and is six-coordinated in a CdN4O2manner by four imidazole N atoms of four symmetry-related 2-amino-4,5-dicyanoimidazolate (adci) anions in the equatorial plane and by two O atoms of symmetry-relatedN,N-dimethylformamide (DMF) ligands in axial positions. The adci−anions bridge adjacent Cd2+ions [shortest Cd...Cd separation = 6.733 (3) Å] into a layered coordination polymer extending parallel to (001). The primary amino group and the non-coordinating cyano groups of adci−anions are involved in hydrogen-bonding interactions with DMF ligands to stabilize the crystal structure.

Exploiting hydrogen bonding interactions to probe smaller linear and cyclic diamines binding to G-quadruplexes: a DFT and molecular dynamics study

2017 ◽  
Vol 19 (18) ◽  
pp. 11474-11484 ◽  
Author(s):  
Mrinal Kanti Si ◽  
Anik Sen ◽  
Bishwajit Ganguly
Keyword(s):  
Molecular Dynamics ◽  
Hydrogen Bonding ◽  
Binding Motif ◽  
Stacking Interactions ◽  
Hydrogen Bonding Interactions ◽  
Π Stacking ◽  
G Quadruplex

This report reveals that hydrogen bonding interactions between the ligand and G-quadruplex can initiate an alternative binding motif to typical π-stacking interactions.

scholarly journals (η5-Cyclopentadienyl)(η6-mesitylamine)ruthenium(II) hexafluoridophosphate

2009 ◽  
Vol 65 (6) ◽  
pp. m631-m631
Author(s):  
Eva Becker ◽  
Karl Kirchner ◽  
Kurt Mereiter
Keyword(s):  
Hydrogen Bonding ◽  
Least Squares ◽  
Benzene Ring ◽  
Title Compound ◽  
Crystal Packing ◽  
Amino Group ◽  
Electronic Effects ◽  
Sandwich Complex ◽  
Hydrogen Bonding Interactions

The title compound, [Ru(η5-C5H5){η6-C6H2(CH3)3NH2}]PF6, contains a sandwich complex with a mesitylamine unit which is significantly non-planar at theipso-carbon of the amino group due to repulsive electronic effects with Ru. Theipso-carbon deviates by 0.107 (3) Å from the least-squares plane of the remaining five benzene ring atoms, which show an r.m.s. deviation of 0.005 Å. N—H...F hydrogen-bonding interactions help to consolidate the crystal packing.

scholarly journals Crystal structure of bis(1,3-diaminopropane-κ2N,N′)bis[2-(4-nitrophenyl)acetato-κO]cadmium

2016 ◽  
Vol 72 (2) ◽  
pp. 226-228
Author(s):  
Ian M. Rahn ◽  
Carlos L. Crawford ◽  
Zerihun Assefa ◽  
Jeffery Hendrich ◽  
Richard E. Sykora
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Network Structure ◽  
Layered Structure ◽  
Three Dimensional ◽  
Amino Groups ◽  
Coordination Environment ◽  
Hydrogen Bonding Interactions ◽  
Dimensional Network

In the structure of the title compound, [Cd(C8H6NO4)2(C3H10N2)2], the CdIIatom is located on a center of symmetry with one independent Cd—O distance of 2.3547 (17) Å and two Cd—N distances of 2.3265 (18) and 2.3449 (19) Å. The CdIIatom has an overall octahedral coordination environment. Several types of hydrogen-bonding interactions are evident. Both intra- and intermolecular interactions occur between the amino groups and the O atoms of the acetate group. These N—H...O hydrogen bonds lead to a layered structure extending parallel to thebcplane. In addition, weak intermolecular C—H...O interactions involving the nitro groups exist, leading to the formation of a three-dimensional network structure.

Synthesis and crystal structure of an octahedral nickel(II) complex derived from pentaerythrityl tetraamine

1989 ◽  
Vol 67 (10) ◽  
pp. 1650-1656 ◽  
Author(s):  
A. McAuley ◽  
S. Subramanian ◽  
T. W. Whitcombe
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Three Dimensional ◽  
Amino Group ◽  
Amino Groups ◽  
Octahedral Structure ◽  
Synthesis And Crystal Structure ◽  
Bond Lengths ◽  
Esr Spectrum ◽  
Counter Ion

The Ni(II) complex, Ni(Htam)24+ (tam = pentaerythrityl tetraamine), has been prepared under controlled conditions. In this ion, three of the four amino groups of each ligand are coordinated to yield an octahedral structure which shows tetragonal and trigonal distortion. The fourth amino group is protonated in each case and binds strongly to the counter ion SO42−. The crystal structure (triclinic, [Formula: see text], a = 8.913(3), b = 9.775(2), c = 7.505(3), α = 102.61(4)°, β = 106.28(4)°, γ = 96.40(3)°) has been refined, converging to final values of R = 0.0347 and Rw = 0.0386. The three dimensional nature of the hydrogen bonding in the crystal structure has been described. Differences in Ni—N bond lengths are observed. A transient nickel(III) species is generated chemically or electrochemically. The esr spectrum is consistent with a low spin d7 centre and is axial in nature. Keywords: nickel, pentaerythrityl tetraamine, hydrogen bonding, oxidation.

Implication of the solvent effect, metal ions and topology in the electronic structure and hydrogen bonding of human telomeric G-quadruplex DNA

2016 ◽  
Vol 18 (31) ◽  
pp. 21573-21585 ◽  
Author(s):  
Lokendra Poudel ◽  
Nicole F. Steinmetz ◽  
Roger H. French ◽  
V. Adrian Parsegian ◽  
Rudolf Podgornik ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Electronic Structure ◽  
Metal Ions ◽  
Density Functional ◽  
Three Dimensional ◽  
Functional Study ◽  
Quadruplex Dna ◽  
And Topology ◽  
G4 Dna ◽  
G Quadruplex

First-principles density functional study elucidating the effects of solvent, metal ions and topology on the electronic structure and hydrogen bonding of 12 well-designed three dimensional G-quadruplex (G4-DNA) models.

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