scholarly journals A Binary Supramolecular Assembly with Intense Fluorescence Emission, High pH Stability, and Cation Selectivity: Supramolecular Assembly-Induced Emission Materials

Research ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Xu Wang ◽  
Xin-Yue Lou ◽  
Xiao-Yu Jin ◽  
Feng Liang ◽  
Ying-Wei Yang
Keyword(s):  
Self Assembly ◽  
Inclusion Complexation ◽  
Fluorescence Emission ◽  
Blue Emission ◽  
Supramolecular Assembly ◽  
Supramolecular System ◽  
Cation Selectivity ◽  
Ion Sensing ◽  
Wide Range ◽  
Ammonium Binding

We construct a fluorescent supramolecular system (TPE-Q4⊂ DSP5) of excellent tolerance to a wide range of pH by the facile self-assembly of a new pillar[5]arene bearing disulfonated arms (DSP5) with an AIE-active tetraphenylethene-based tetratopic guest bearing four quaternary ammonium binding sites (TPE-Q4), which exhibits strong blue emission even in dilute aqueous solutions along with much higher quantum yield and longer fluorescence lifetime than TPE-Q4 itself. This appreciable property can be attributed to the supramolecular assembly-induced emission (SAIE) mechanism endowed by the host-guest inclusion complexation based on synthetic macrocycles. Remarkably, the enhanced fluorescence of the supramolecular assembly is quenched efficiently and exclusively by ferric ions in water with a high Stern–Volmer formula constant of 1.3 × 105  mol-1, demonstrating the excellent cation selectivity and visualized responsiveness in ion sensing and detection.

DABCO-Directed Self-Assembly of Pyrene-Centered Porphyrin Pentamers

2013 ◽  
Vol 575-576 ◽  
pp. 123-129
Author(s):  
Zhuang Dong Yuan ◽  
Jing Xia Wang ◽  
Ning Sheng
Keyword(s):  
Self Assembly ◽  
Fluorescence Emission ◽  
The Self ◽  
Spectroscopic Methods ◽  
Assembly Process ◽  
Zinc Porphyrin ◽  
Axial Coordination ◽  
H Nmr ◽  
Wide Range ◽  
Nmr Techniques

DABCO (1, 4-diazabicyclo [2.2.2] octane) has been used in combination with pentameric zinc porphyrin-pyrene array 1 to form well-defined supramolecular arrays through axial coordination. The self-assembly process has been investigated by a wide range of spectroscopic methods including UV-vis, fluorescence emission and 1H NMR techniques.

scholarly journals Photosensitizing properties of hollow microcapsules built by multilayer self-assembly of poly(allylamine hydrochloride) modified with rose Bengal

RSC Advances ◽  
2019 ◽  
Vol 9 (33) ◽  
pp. 19226-19235
Author(s):  
Mariana P. Serrano ◽  
Matías Rafti ◽  
Andrés H. Thomas ◽  
Claudio D. Borsarelli
Keyword(s):  
Rose Bengal ◽  
Self Assembly ◽  
Fluorescence Emission ◽  
Supramolecular Assembly ◽  
Allylamine Hydrochloride ◽  
Novel Strategy

We explored a novel strategy directed to the improvement of rose Bengal fluorescence emission and photosensitization properties by supramolecular assembly into hollow microcapsules using LbL technique.

scholarly journals Concentration-dependent supramolecular self-assembly of A1/A2-asymmetric-difunctionalized pillar[5]arene

RSC Advances ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 2995-3002
Author(s):  
Talal F. Al-Azemi ◽  
Mickey Vinodh
Keyword(s):  
Self Assembly ◽  
Supramolecular Assembly ◽  
P Concentration ◽  
Wide Range

Concentration-dependent supramolecular self-assembly of A1/A2-asymmetric-difunctionalized pillar[5]arene was synthesized by co-cyclization strategy. This approach enables wide range of structural manipulations to regulate the supramolecular assembly.

A new supramolecular catalytic system: the self-assembly of Rh8 cage host anthracene molecules for [4 + 4] cycloaddition induced by UV irradiation

2020 ◽  
Vol 49 (28) ◽  
pp. 9688-9693
Author(s):  
Wei-Bin Yu ◽  
Feng-Yi Qiu ◽  
Po Sun ◽  
Hua-Tian Shi ◽  
Zhi-Feng Xin
Keyword(s):  
Uv Irradiation ◽  
Catalytic System ◽  
Self Assembly ◽  
Uv Light ◽  
Cycloaddition Reaction ◽  
Supramolecular Assembly ◽  
The Self ◽  
Supramolecular System ◽  
Guest Molecules ◽  
Guest Chemistry

The supramolecular assembly is significant in host–guest chemistry. In this work, a new supramolecular system assembled through a distorted cuboid was introduced. Moreover, the [4 + 4] cycloaddition reaction of the guest molecules was further studied under UV light.

Modular Peptide-Based Hybrid Nanoprobes for Bio-Imaging and Bio-Sensing

2014 ◽  
Vol 1621 ◽  
pp. 155-161 ◽  
Author(s):  
Banu Taktak Karaca ◽  
James Meyer ◽  
Sarah VanOosten ◽  
Mark Richter ◽  
Candan Tamerler
Keyword(s):  
Self Assembly ◽  
Copper Ions ◽  
Copper Ion ◽  
Gold Surface ◽  
Protein Arrays ◽  
Recognition Element ◽  
Ion Sensing ◽  
Wide Range ◽  
Biological Recognition ◽  
Assembly Technique

ABSTRACTThe self-organization of functional proteins directly onto solid materials is attractive to a wide range of biomaterials and systems that need to accommodate a biological recognition element. In such systems, inorganic binding peptides may be an essential component due to their high affinity and selective binding features onto different types of solid surfaces. This study demonstrates a peptide-enabled self-assembly technique for designing well-defined protein arrays over a metal surface. To illustrate this concept, we designed a fusion protein that simultaneously displays a red fluorescence protein (DsRed-monomer), which is highly selective for copper ions, and a gold binding peptide AuBP. The peptide tag, AuBP, self-directs the organization of DsRed-monomer protein onto a gold surface and forms arrays built upon an efficient control of the organic/inorganic interface at the molecular level. The peptide-assisted design offers a modular approach for fabrication of fluorescent-based protein arrays with copper ion sensing ability.

Factors Affecting Molecular Self-Assembly and Its Mechanism

2012 ◽  
Vol 9 (1) ◽  
pp. 43 ◽  
Author(s):  
Hueyling Tan
Keyword(s):  
Self Assembly ◽  
Building Blocks ◽  
Molecular Engineering ◽  
Molecular Structures ◽  
Polymer Science ◽  
New Approach ◽  
Factors Affecting ◽  
Dna Structures ◽  
Self Assembling ◽  
Wide Range

Molecular self-assembly is ubiquitous in nature and has emerged as a new approach to produce new materials in chemistry, engineering, nanotechnology, polymer science and materials. Molecular self-assembly has been attracting increasing interest from the scientific community in recent years due to its importance in understanding biology and a variety of diseases at the molecular level. In the last few years, considerable advances have been made in the use ofpeptides as building blocks to produce biological materials for wide range of applications, including fabricating novel supra-molecular structures and scaffolding for tissue repair. The study ofbiological self-assembly systems represents a significant advancement in molecular engineering and is a rapidly growing scientific and engineering field that crosses the boundaries ofexisting disciplines. Many self-assembling systems are rangefrom bi- andtri-block copolymers to DNA structures as well as simple and complex proteins andpeptides. The ultimate goal is to harness molecular self-assembly such that design andcontrol ofbottom-up processes is achieved thereby enabling exploitation of structures developed at the meso- and macro-scopic scale for the purposes oflife and non-life science applications. Such aspirations can be achievedthrough understanding thefundamental principles behind the selforganisation and self-synthesis processes exhibited by biological systems.

scholarly journals Regulation of bi-color fluorescence changes of AIE supramolecular self-assembly gels by the interaction with Al3+ and energy transfer

2021 ◽  
Author(s):  
Xinxian Ma ◽  
Jinlong Yue ◽  
Bo Qiao ◽  
LIli Zhou ◽  
Yang Gao ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Self Assembly ◽  
Fluorescence Emission ◽  
Fluorescent Materials

Supramolecular fluorescent materials have attracted considerable attention in recent years since they endow specific and unique properties to materials. Nevertheless, the utilization of photo-responsive characteristics to modulate their fluorescence emission...

scholarly journals Polymer cyclization for the emergence of hierarchical nanostructures

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Chaojian Chen ◽  
Manjesh Kumar Singh ◽  
Katrin Wunderlich ◽  
Sean Harvey ◽  
Colette J. Whitfield ◽  
...  
Keyword(s):  
Self Assembly ◽  
Three Dimensional ◽  
Hierarchical Structures ◽  
Structural Similarity ◽  
Vital Role ◽  
Nanomaterial Synthesis ◽  
Wide Range ◽  
Linear Poly ◽  
Polymer Folding ◽  
Dynamics Simulations

AbstractThe creation of synthetic polymer nanoobjects with well-defined hierarchical structures is important for a wide range of applications such as nanomaterial synthesis, catalysis, and therapeutics. Inspired by the programmability and precise three-dimensional architectures of biomolecules, here we demonstrate the strategy of fabricating controlled hierarchical structures through self-assembly of folded synthetic polymers. Linear poly(2-hydroxyethyl methacrylate) of different lengths are folded into cyclic polymers and their self-assembly into hierarchical structures is elucidated by various experimental techniques and molecular dynamics simulations. Based on their structural similarity, macrocyclic brush polymers with amphiphilic block side chains are synthesized, which can self-assemble into wormlike and higher-ordered structures. Our work points out the vital role of polymer folding in macromolecular self-assembly and establishes a versatile approach for constructing biomimetic hierarchical assemblies.

A ratiometric optical strategy for bromide and iodide ion sensing based on target-induced competitive coordination of a metal–organic nanosystem

2020 ◽  
Vol 8 (33) ◽  
pp. 11517-11524
Author(s):  
Yu Zhu Fan ◽  
Lei Han ◽  
Shi Gang Liu ◽  
Ying Zhang ◽  
Hong Qun Luo ◽  
...  
Keyword(s):  
Self Assembly ◽  
Iodide Ions ◽  
Ratiometric Sensing ◽  
Ion Sensing ◽  
Coordination Bonding ◽  
Iodide Ion ◽  
Competitive Coordination ◽  
Metal Organic

A metal–organic nanosystem constructed via coordination bonding-induced self-assembly is used for fluorescence and scattering ratiometric sensing of bromide and iodide ions.

Zeolates: A Coordination Chemistry View of Metal-Ligand Bonding in Intrazeolite MOCVD Type Precursors and Semiconductor Nanoclusters

1992 ◽  
Vol 277 ◽  
Author(s):  
Geoffrey A. Ozin ◽  
Carol L. Bowes ◽  
Mark R. Steele
Keyword(s):  
Self Assembly ◽  
Materials Science ◽  
Zeolite Y ◽  
Chemical Vapour ◽  
Internal Surface ◽  
Building Blocks ◽  
Structural Features ◽  
Organic Chemical ◽  
Wide Range ◽  
Shape Selective

ABSTRACTVarious MOCVD (metal-organic chemical vapour deposition) type precursors and their self-assembled semiconductor nanocluster products [1] have been investigated in zeolite Y hosts. From analysis of in situ observations (FTIR, UV-vis reflectance, Mössbauer, MAS-NMR) of the reaction sequences and structural features of the precursors and products (EXAFS and Rietveld refinement of powder XRD data) the zeolite is viewed as providing a macrospheroidal, multidendate coordination environment towards encapsulated guests. By thinking about the α- and β-cages of the zeolite Y host effectively as a zeolate ligand composed of interconnected aluminosilicate “crown ether-like” building blocks, the materials chemist is able to better understand and exploit the reactivity and coordination properties of the zeolite internal surface for the anchoring and self-assembly of a wide range of encapsulated guests. This approach helps with the design of synthetic strategies for creating novel guest-host inclusion compounds having possible applications in areas of materials science such as nonlinear optics, quantum electronics, and size/shape selective catalysis.

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