scholarly journals Polymer-mediated ternary supramolecular interactions for sensitive detection of peptides

The Analyst ◽  
2017 ◽  
Vol 142 (1) ◽  
pp. 118-122 ◽  
Author(s):  
Mahalia A. C. Serrano ◽  
Huan He ◽  
Bo Zhao ◽  
Rajasekhar R. Ramireddy ◽  
Richard W. Vachet ◽  
...  
Keyword(s):  
Electrostatic Interactions ◽  
Sensitive Detection ◽  
Supramolecular Interactions ◽  
Supramolecular System ◽  
Donor Acceptor

A combination of donor–acceptor and electrostatic interactions in a three-component supramolecular system has been shown to form the basis for selective and sensitive detection of peptides.

scholarly journals Calix[4]arene-Based MOFs Controlled by Length of Alkyldiammonium Guests

2014 ◽  
Vol 70 (a1) ◽  
pp. C1713-C1713
Author(s):  
Ki-Min Park ◽  
Eunji Lee ◽  
Huiyeong Ju ◽  
Suk-Hee Moon ◽  
Shim Sung Lee
Keyword(s):  
Electrostatic Interactions ◽  
Three Dimensional ◽  
Van Der Waals Interactions ◽  
Supramolecular Interactions ◽  
Solvothermal Reaction ◽  
Guest Molecules ◽  
Structural Framework ◽  
Guest Species ◽  
Dimensional Network ◽  
Alternative Conformation

Our interest in the development of MOFs with the cavities controlled by guest species has led us to investigate the MOFs based on calix[4]arene derivatives, in which metal ions link the calix unit to give the networks with the cavities accommodating several guest species, because the calix[4]arene-based MOFs contain porosity associated with both the ligand itself and the structural framework. In the present work, we employed a low rim-functionalized calix[4]arene tetraacetic acid (H4CTA) with 1,3-alternative conformation as a multidentate building block and alkyldiamines as the guest molecules. In the solvothermal reaction of H4CTA and Zn(II) ion in the presence of alkyldiamines, two types of new MOFs based on calix[4]arene tetraacetate (CTA4-) depending on the lengths of α,ω–alkyldiammonium guests have been synthesized by including suitable alkyldiammonium guests. Their single-crystal X-ray diffraction analyses reveal that the short alkyldiammonium guests such as ethyldiammonium, propyldiammonium, and butyldiammonium lead to form two-dimensional framework with the cavity consisting of two CTA4-and four Zn(II) ions whereas the alkyldiammonium guests such as heptyldiammonium, octyldiammonium, nonyldiammonium, and decyldiammonium give rise to generate three-dimensional network with the cavity surrounded by six CTA4-and four Zn(II) ions. The alkyldiammonium guests in both MOFs are well accommodated by each cavity via a variety of supramolecular interactions including electrostatic interactions, hydrogen bonds and van der Waals interactions. We will present and discuss a study on the syntheses and characterization of two new MOFs based on calix[4]arene derivative.

Phthalocyanine-corannulene conjugates: Synthesis, complexation studies with a pyridyl-functionalized C60 fullerene, and photophysical properties

2020 ◽  
Vol 24 (01n03) ◽  
pp. 410-415 ◽  
Author(s):  
Juan A. Suanzes ◽  
Sumit Chaurasia ◽  
Rafael M. Krick Calderon ◽  
Dirk M. Guldi ◽  
Giovanni Bottari ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Supramolecular Interactions ◽  
C60 Fullerene ◽  
Time Resolved ◽  
Complexation Studies ◽  
Donor Acceptor ◽  
Photophysical Studies ◽  
Covalently Linked ◽  
Photoinduced Charge

We report here the synthesis and characterization of some novel Zn(II)phthalocyanine (Pc)-corannulene conjugates and their complexation ability towards a pyridyl-functionalized C[Formula: see text] fullerene through metal-ligand supramolecular interactions. Steady-state and time-resolved photophysical studies carried out on these electron donor–acceptor (D–A) Zn(II)Pc-corannulene/C[Formula: see text] ensembles indicate the formation of photogenerated charge-separated species. Interestingly, a stabilization of the photoinduced charge-separated state is observed in the case of the D–A supramolecular complexes comprising the corannulene-substituted Zn(II)Pcs when compared to their non-corannulene functionalized Zn(II)Pc analogues. We rationalize this stabilizing effect of the charge-separated state exerted by the corannulene as a result of the increased [Formula: see text]-extension and augmented hydrophobicity of the Zn(II)Pc core by the covalently-linked polyaromatic hydrocarbon (PAH) fragment.

An ionic charge-transfer dyad prepared cost-effectively from a tetrathiafulvalene carboxylate anion and a TMPyP cation

2016 ◽  
Vol 18 (4) ◽  
pp. 2940-2948 ◽  
Author(s):  
Li-Jun Xue ◽  
Peng Huo ◽  
Yan-Hong Li ◽  
Jin-Le Hou ◽  
Qin-Yu Zhu ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Cost Effective ◽  
Carboxylate Anion ◽  
Supramolecular System ◽  
Ionic Charge ◽  
Donor Acceptor

The assembly of a simple ionic supramolecular system would be a cost-effective way to construct donor–acceptor ensembles and the strong anion–cation interaction can enhance the charge-transfer between them.

Supramolecular organization of phthalocyanines: from solution to surface

2009 ◽  
Vol 13 (04n05) ◽  
pp. 471-480 ◽  
Author(s):  
M. Victoria Martínez-Díaz ◽  
Giovanni Bottari
Keyword(s):  
Photophysical Properties ◽  
Building Blocks ◽  
Supramolecular Interactions ◽  
Supramolecular Organization ◽  
Supramolecular Systems ◽  
Ligand Interactions ◽  
Donor Acceptor ◽  
Interesting Class ◽  
Non Covalent Interactions ◽  
Covalent Interactions

Phthalocyanines are an interesting class of aromatic macrocycles which possess exciting electrical, redox and photophysical properties that make them ideal building blocks for applications in different technological fields. However, the incorporation of phthalocyanines into devices is often tied to the possibility of organizing these macrocycles into arrays using supramolecular interactions. To date, several supramolecular motifs such as hydrogen-bonding, donor-acceptor or metal-ligand interactions have been used to promote the phthalocyanines' organization in solution. Furthermore, such weak, non-covalent interactions have also been widely employed to foster the organization of these macrocycles in condensed phases such as liquid-crystals or thin films. This micro-review provides a brief overview of the contribution made by some research groups in Spain towards the preparation of organized phthalocyanine-based supramolecular systems.

scholarly journals MnO2nanosheet mediated “DD–A” FRET binary probes for sensitive detection of intracellular mRNA

2017 ◽  
Vol 8 (1) ◽  
pp. 668-673 ◽  
Author(s):  
Min Ou ◽  
Jin Huang ◽  
Xiaohai Yang ◽  
Ke Quan ◽  
Yanjing Yang ◽  
...  
Keyword(s):  
Sensitive Detection ◽  
Donor Acceptor ◽  
Fret Efficiency

The donor donor–acceptor (DD–A) FRET model has proven to have a higher FRET efficiency than donor–acceptor acceptor (D–AA), donor–acceptor (D–A), and donor donor–acceptor acceptor (DD–AA) FRET models.

Donor–acceptor, ferrocenyl substituted BODIPYs with marvelous supramolecular interactions

2013 ◽  
Vol 42 (5) ◽  
pp. 1512-1518 ◽  
Author(s):  
Bhausaheb Dhokale ◽  
Prabhat Gautam ◽  
Shaikh M. Mobin ◽  
Rajneesh Misra
Keyword(s):  
Supramolecular Interactions ◽  
Donor Acceptor

A FRET aptasensor for sensitive detection of aflatoxin B1 based on a novel donor-acceptor pair between ZnS quantum dots and Ag nanocubes

2020 ◽  
Author(s):  
Chengquan Wang ◽  
Wuhao Zhang ◽  
Jing Qian ◽  
Li Wang ◽  
Yi Ren ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Fluorescence Resonance Energy Transfer ◽  
Aflatoxin B1 ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Sensitive Detection ◽  
Acceptor Pair ◽  
Donor Acceptor ◽  
Donor Acceptor Pair

Aflatoxin B1 (AFB1) is one of the most carcinogenic chemicals. We proposed a novel fluorescence resonance energy transfer (FRET) sensor based on aptamer recognition technology for the sensitive detection of...

Fluorescence Quenching of CdTe Quantum Dots with Co (III) Complexes via Electrostatic Assembly Formation

2018 ◽  
Vol 232 (9-11) ◽  
pp. 1413-1430 ◽  
Author(s):  
Anuushka Pal ◽  
Bhawna Arora ◽  
Diksha Rani ◽  
Sumit Srivastava ◽  
Rajeev Gupta ◽  
...  
Keyword(s):  
Functional Groups ◽  
Electrostatic Interactions ◽  
Time Resolved ◽  
Potential Measurement ◽  
Electrostatic Assembly ◽  
Cdte Qds ◽  
Salt Addition ◽  
Carboxylic Groups ◽  
Donor Acceptor ◽  
Positively Charged

Abstract The photoluminescence quenching of CdTe QDs in the presence of three different Co (III)-complexes is studied to elucidate the role of interactions between functional groups of positively charged cysteamine capped CdTe QDs and negatively charged Co (III) complexes bearing carboxylic groups. The steady state and time resolved spectroscopy has been used to investigate the mechanism of quenching. After detailed analysis, it is concluded that quenching is contributed by both static as well as dynamic processes. The static contribution has been assigned to the electrostatic assembly formation via ionic interactions between the amine functional groups of positively charged cysteamine capped CdTe QDs and carboxylic acid groups of negatively charged complexes. The electrostatic interactions were confirmed by zeta potential measurement as well as from effect of salt addition. These studies have implications in designing donor/acceptor pairs having complementary functional groups for efficient optoelectronic devices or photocatalytic systems.

scholarly journals Differential Interactions of Chiral Nanocapsules with DNA

2021 ◽  
Vol 22 (2) ◽  
pp. 584
Author(s):  
Amani Zoabi ◽  
Katherine Margulis
Keyword(s):  
Electrostatic Interactions ◽  
Volatile Oil ◽  
Supramolecular Interactions ◽  
The Novel ◽  
Fourfold Increase ◽  
Dna Oligonucleotides ◽  
Oil In Water ◽  
Preferential Binding ◽  
Capsule Size ◽  
Modification Of The Surface

(1) Background: Chiral nanoparticular systems have recently emerged as a compelling platform for investigating stereospecific behavior at the nanoscopic level. We describe chiroselective supramolecular interactions that occur between DNA oligonucleotides and chiral polyurea nanocapsules. (2) Methods: We employ interfacial polyaddition reactions between toluene 2,4-diisocyanate and lysine enantiomers that occur in volatile oil-in-water nanoemulsions to synthesize hollow, solvent-free capsules with average sizes of approximately 300 nm and neutral surface potential. (3) Results: The resultant nanocapsules exhibit chiroptical activity and interact differentially with single stranded DNA oligonucleotides despite the lack of surface charge and, thus, the absence of significant electrostatic interactions. Preferential binding of DNA on d-polyurea nanocapsules compared to their l-counterparts is demonstrated by a fourfold increase in capsule size, a 50% higher rise in the absolute value of negative zeta potential (ζ-potential), and a three times lower free DNA concentration after equilibration with the excess of DNA. (4) Conclusions: We infer that the chirality of the novel polymeric nanocapsules affects their supramolecular interactions with DNA, possibly through modification of the surface morphology. These interactions can be exploited when developing carriers for gene therapy and theranostics. The resultant constructs are expected to be highly biocompatible due to their neutral potential and biodegradability of polyurea shells.

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