Binding Mode Multiplicity and Multiscale Chirality in the Supramolecular Assembly of DNA and a π‐Conjugated Polymer

ChemPhysChem ◽  
2020 ◽  
Vol 21 (23) ◽  
pp. 2543-2552
Author(s):  
Mathieu Fossépré ◽  
Inbal Tuvi‐Arad ◽  
David Beljonne ◽  
Sébastien Richeter ◽  
Sébastien Clément ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Supramolecular Assembly ◽  
Binding Mode

scholarly journals Solid-State Emissive Metallo-Supramolecular Assemblies of Quinoline-Based Acyl Hydrazone

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 600 ◽  
Author(s):  
Hye Jin Cho ◽  
TaeWoo Kim ◽  
Hyunwoo Kim ◽  
Changsik Song
Keyword(s):  
Solid State ◽  
Inductively Coupled Plasma ◽  
Low Cost ◽  
Supramolecular Assembly ◽  
Optical Emission ◽  
Binding Mode ◽  
Binding Modes ◽  
Inductively Coupled ◽  
Acyl Hydrazone ◽  
Hydrazone Derivative

Development of fluorescence-based sensory materials for metal elements is currently in the mainstream of research due to the simplicity and usability of fluorescence as a method of detection. Herein, we report a novel “bis”-quinoline-based acyl hydrazone—named bQH that could be synthesized by a facile, low-cost method through simple condensation of hydrazide with an aldehyde. This acyl hydrazone showed emissive properties through Zn selective binding, especially in its solid-state, as shown by experiments such as UV–Vis, photoluminescence (PL), nuclear magnetic resonance (NMR), and inductively-coupled plasma-optical emission spectroscopies (ICP-OES), and energy-dispersive X-ray spectroscopy (EDS) mapping. The binding modes in which bQH coordinates to Zn2+ was proved to consist of two modes, 1:1 and 1:2 (bQH:Zn2+), where the binding mode was controlled by the Zn2+ ion content. Under the 1:1 binding mode, bQH-Zn2+ complexes formed a polymeric array through the metallo-supramolecular assembly. The resulting bQH-Zn2+ complex maintained its fluorescence in solid-state and exhibited excellent fluorescence intensity as compared to the previously reported quinoline-based acyl hydrazone derivative (mQH).

A stimuli-responsive supramolecular assembly between inverted cucurbit[7]uril and hemicyanine dye

2018 ◽  
Vol 42 (18) ◽  
pp. 15420-15426 ◽  
Author(s):  
Zhong-Zheng Gao ◽  
Jinglan Kan ◽  
Zhu Tao ◽  
Bing Bian ◽  
Xin Xiao
Keyword(s):  
Supramolecular Assembly ◽  
Binding Mode ◽  
Stimuli Responsive ◽  
Hemicyanine Dye

The effect of inverted curcurbit[7]uril (iQ[7]) on the binding mode of 2-(4-(dimethylamino)styryl)-1-methylpyridinium (DASPMI) was determined in this study.

scholarly journals Disassembly of Dimeric Cyanine Dye Supramolecular Assembly by Tetramolecular G-quadruplex Dependence on Linker Length and Layers of G-quartet

Molecules ◽  
2019 ◽  
Vol 24 (10) ◽  
pp. 2015 ◽  
Author(s):  
Lijia Yu ◽  
Yansong Zhang ◽  
Chunguang Ding ◽  
Xiaodong Shi
Keyword(s):  
Supramolecular Assembly ◽  
Cyanine Dyes ◽  
Binding Mode ◽  
Cyanine Dye ◽  
Linker Length ◽  
Disassembly Process ◽  
1H Nmr Titration ◽  
Repeat Units ◽  
G Quadruplex ◽  
Photochemical Properties

Cyanine dyes have been widely applied in various biological systems owing to their specific photochemical properties. Assembly and disassembly process of cyanine dyes were constructed and regulated by special biomolecules. In this paper, dimeric cyanine dyes with different repeat units (oligo-oxyethylene) in linker (TC-Pn) (n = 3–6) were found to form H-aggregates or mixture aggregates in PBS. These aggregates could be disassembled into dimer and/or monomer by (TGnT) tetramolecular G-quadruplexes (n = 3–6, 8), which were affected by the linker length of dimeric cyanine dyes and layers of G-quartets. The 1H-NMR titration results suggest that the binding mode of dimeric cyanine dye with TGnT might be on both ends—stacking like a clip. This binding mode could clearly explain that matching structures between dimeric cyanine dyes and TGnT quadruplexes could regulate the disassembly properties of aggregates. These results could provide clues for the development of highly specific G-quadruplex probes.

Block copolymer supramolecular assembly using a precursor to a novel conjugated polymer

2013 ◽  
Vol 4 (5) ◽  
pp. 1482-1490 ◽  
Author(s):  
Daniel Hagaman ◽  
Jacob Gredzik ◽  
Patricia A. Peart ◽  
J. Michael McCaffery ◽  
John D. Tovar ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Conjugated Polymer ◽  
Supramolecular Assembly

Irreversible destruction of amyloid fibril plaques by conjugated polymer based fluorogenic nanogrenades

2016 ◽  
Vol 4 (26) ◽  
pp. 4502-4506 ◽  
Author(s):  
Wei-Tao Dou ◽  
Ying Lv ◽  
Chunyan Tan ◽  
Guo-Rong Chen ◽  
Xiao-Peng He
Keyword(s):  
Conjugated Polymers ◽  
White Light ◽  
Conjugated Polymer ◽  
Amyloid Fibril ◽  
Fluorescent Dyes ◽  
Amyloid Β ◽  
Supramolecular Assembly ◽  
Light Irradiation

Supramolecular assembly between conjugated polymers and fluorescent dyes produces a unique class of fluorogenic “nanogrenades” with the ability to image as well as irreversibly destruct amyloid β fibril plaques by simple white-light irradiation.

The 3-Dimensional Molecular Structure of the Actin Filament Revisited

1985 ◽  
Vol 43 ◽  
pp. 480-481
Author(s):  
U. Aebi ◽  
R. Millonig ◽  
H. Salvo
Keyword(s):  
Actin Filament ◽  
Supramolecular Assembly ◽  
Specimen Preparation ◽  
X Ray Diffraction ◽  
Single Filament ◽  
X Ray ◽  
3 Dimensional ◽  
Filament Diameter ◽  
Preparation Conditions ◽  
Apparent Diameter

To date, most 3-D reconstructions of undecorated actin filaments have been obtained from actin filament paracrystal data (for refs, see 1,2). However, due to the fact that (a) the paracrystals may be several filament layers thick, and (b) adjacent filaments may sustantially interdigitate, these reconstructions may be subject to significant artifacts. None of these reconstructions has permitted unambiguous tracing or orientation of the actin subunits within the filament. Furthermore, measured values for the maximal filament diameter both determined by EM and by X-ray diffraction analysis, vary between 6 and 10 nm. Obviously, the apparent diameter of the actin filament revealed in the EM will critically depend on specimen preparation, since it is a rather flexible supramolecular assembly which can easily be bent or distorted. To resolve some of these ambiguities, we have explored specimen preparation conditions which may preserve single filaments sufficiently straight and helically ordered to be suitable for single filament 3-D reconstructions, possibly revealing molecular detail.

Experimental validation of the predicted TGR5 binding mode model

2015 ◽  
Vol 53 (01) ◽  
Author(s):  
L Spomer ◽  
CGW Gertzen ◽  
D Häussinger ◽  
H Gohlke ◽  
V Keitel
Keyword(s):  
Experimental Validation ◽  
Binding Mode

Scanning-tunneling spectroscopy on conjugated polymer films

2003 ◽  
Vol 771 ◽  
Author(s):  
M. Kemerink ◽  
S.F. Alvarado ◽  
P.M. Koenraad ◽  
R.A.J. Janssen ◽  
H.W.M. Salemink ◽  
...  
Keyword(s):  
Polymer Films ◽  
Conjugated Polymer ◽  
Three Dimensional ◽  
Field Enhancement ◽  
Direct Consequence ◽  
Scanning Tunneling Spectroscopy ◽  
Tunneling Spectroscopy ◽  
Band Alignment ◽  
Scanning Tunneling ◽  
Order Of Magnitude

AbstractScanning-tunneling spectroscopy experiments have been performed on conjugated polymer films and have been compared to a three-dimensional numerical model for charge injection and transport. It is found that field enhancement near the tip apex leads to significant changes in the injected current, which can amount to more than an order of magnitude, and can even change the polarity of the dominant charge carrier. As a direct consequence, the single-particle band gap and band alignment of the organic material can be directly obtained from tip height-voltage (z-V) curves, provided that the tip has a sufficiently sharp apex.

Optical and Electrical Properties of Organic Conducting Polymers

2014 ◽  
Vol 8 (1) ◽  
pp. 1457-1463
Author(s):  
Salah Abdulla Hasoon
Keyword(s):  
Electrical Properties ◽  
Conjugated Polymer ◽  
Polymeric Materials ◽  
Quantum Mechanical ◽  
Optical And Electrical Properties ◽  
Electrically Conducting ◽  
Temperature Ranges ◽  
Lithium Tetrafluoroborate ◽  
Absorbance Peak ◽  
Polymerization Method

Novel electrically conducting polymeric materials are prepared in this work. Polythiophene (PT) and poly (3-Methelthiophene) (P3MT) films were prepared by electro-polymerization method using cyclic voltammetry in acetonitrile as a solvent and lithium tetrafluoroborate as the electrolyte on a gold electrode. Electrical properties of P3MT have been examined in different environments using UV-Vis absorption spectroscopy and quantum mechanical ab initio calculations, The observed absorption peaks at 314 and 415 nm, were attributed to the n-π* and π-π* transitions, respectively in the conjugated polymer chain, in contrast, the observed absorbance peak at 649 nm, is responsible for electric conduction. The temperature dependence of the conductivity can be fitted to the Arrhenius and the VTF equations in different temperature ranges.

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