scholarly journals Fullerene-Tetrabenzofluorene (C60-TBF) in Multivalent Photosensitisation for Enhanced ZnO-based Photo-catalysts: Mono vs. Hexakis Adduct

2022 ◽  
Author(s):  
Munusamy Krishnamurthy ◽  
Philip Hope ◽  
P Ramar ◽  
A. A. Boopathi ◽  
Srinivasan Sampath ◽  
...  
Keyword(s):  
Self Assembly ◽  
Hydrogen Generation ◽  
Active Material ◽  
Type Systems ◽  
Clear Understanding ◽  
Catalytic Method ◽  
Design Synthesis ◽  
Polycyclic Aromatic ◽  
Assembly Behavior ◽  
Comparative Results

Photo-catalysts offer a simple catalytic method with widespread applications like degradation of polluting dyes, hydrogen generation from water, etc., in the presence of a photon source like sunlight. The development of a second-generation photo-catalyst in the form of a nanocomposite is an integral part of research to improve the practical usefulness and efficiency of the process. A systematic study using the active material with controlled functional groups is required to understand the process in detail as well as to develop efficient photocatalytic systems. In this paper, we report the design, synthesis, detailed physicochemical studies, and self-assembly of interesting materials where fullerenes have been functionalized with polycyclic, aromatic, conjugated, butterfly-shaped molecules like Tetrabenzofluorene (TBF) using a well-known click chemistry approach. Detailed analyses using spectroscopic, electrochemical, and microscopic or X-ray diffraction (single crystal) techniques were undertaken for a clear understanding of their photophysical or self-assembly behavior. The functionalized fullerene material was mainly used so that comparative results could be presented where two units (mono adduct) or twelve units (hexakis adduct) of TBF molecules were attached separately. These comparative studies were beneficial for unambiguous interpretation of results and drawing definitive conclusions regarding the energy transfer with cascade-type systems. Finally, those results were useful for the logical understanding of photo-catalytic experiments using those designer fullerene materials.

scholarly journals Fully Fused Boron-Doped Polycyclic Aromatic Hydrocarbons: Their Synthesis, Structure–Property Relationships, and Self-Assembly Behavior in Aqueous Media

2022 ◽  
Author(s):  
Hiroki Narita ◽  
Heekyoung Choi ◽  
Masato Ito ◽  
Naoki Ando ◽  
Soichiro Ogi ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Self Assembly ◽  
Aqueous Media ◽  
Structure Property ◽  
Organic Optoelectronics ◽  
Structure Property Relationships ◽  
Boron Doped ◽  
Polycyclic Aromatic ◽  
Assembly Behavior

Planarized triarylboranes are attracting increasing attention not only as models of boron-doped graphenes, but also as promising materials for organic optoelectronics. In particular, polycyclic aromatic hydrocarbon (PAH) skeletons with embedded...

scholarly journals Genetically Engineered Elastin-based Biomaterials for Biomedical Applications

2020 ◽  
Vol 26 (40) ◽  
pp. 7117-7146 ◽  
Author(s):  
Mercedes Santos ◽  
Sofía Serrano-Dúcar ◽  
Juan González-Valdivieso ◽  
Reinaldo Vallejo ◽  
Alessandra Girotti ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Self Assembly ◽  
Biomedical Applications ◽  
Surface Engineering ◽  
Genetically Engineered ◽  
Structural Protein ◽  
Design Synthesis ◽  
Host Interactions ◽  
Innovative Biomaterials ◽  
Assembly Behavior

: Protein-based polymers are some of the most promising candidates for a new generation of innovative biomaterials as recent advances in genetic-engineering and biotechnological techniques mean that protein-based biomaterials can be designed and constructed with a higher degree of complexity and accuracy. Moreover, their sequences, which are derived from structural protein-based modules, can easily be modified to include bioactive motifs that improve their functions and material-host interactions, thereby satisfying fundamental biological requirements. : The accuracy with which these advanced polypeptides can be produced, and their versatility, self-assembly behavior, stimuli-responsiveness and biocompatibility, means that they have attracted increasing attention for use in biomedical applications such as cell culture, tissue engineering, protein purification, surface engineering and controlled drug delivery. : The biopolymers discussed in this review are elastin-derived protein-based polymers which are biologically inspired and biomimetic materials. This review will also focus on the design, synthesis and characterization of these genetically encoded polymers and their potential utility for controlled drug and gene delivery, as well as in tissue engineering and regenerative medicine.

scholarly journals Design, Synthesis, and Self-Assembly Behavior of Liquid-Crystalline Bis-[60]Fullerodendrimers

2016 ◽  
Vol 22 (48) ◽  
pp. 17366-17376 ◽  
Author(s):  
Virginie Russo ◽  
Pauline Pieper ◽  
Benoît Heinrich ◽  
Bertrand Donnio ◽  
Robert Deschenaux
Keyword(s):  
Self Assembly ◽  
Liquid Crystalline ◽  
Design Synthesis ◽  
Assembly Behavior

scholarly journals Bilingual Peptide Nucleic Acids: Encoding the Languages of Nucleic Acids and Proteins in a Single Self-Assembling Biopolymer

2019 ◽  
Author(s):  
Colin Swenson ◽  
Arventh Velusamy ◽  
Hector Argueta-Gonzalez ◽  
Jennifer Heemstra
Keyword(s):  
Amino Acid ◽  
Nucleic Acid ◽  
Nucleic Acids ◽  
Self Assembly ◽  
Stimuli Responsive ◽  
Design Synthesis ◽  
Sequence Recognition ◽  
Potential Applications ◽  
Assembly Behavior ◽  
Aqueous Conditions

<div> <div> <div> <p>Nucleic acids and proteins are the fundamental biopolymers that support all life on Earth. Nucleic acids store large amounts of information in nucleobase sequences while peptides and proteins utilize diverse amino acid functional groups to adopt complex structures and perform wide-ranging activities. Although Nature has evolved machinery to read the nucleic acid code and translate it into amino acid code, the extant biopolymers are restricted to encoding amino acid or nucleotide sequences separately, limiting their potential applications in medicine and biotechnology. Here we describe the design, synthesis, and stimuli-responsive assembly behavior of a bilingual biopolymer that integrates both amino acid and nucleobase sequences into a single peptide nucleic acid (PNA) scaffold to enable tunable storage and retrieval of tertiary structural behavior and programmable molecular recognition capabilities. Incorporation of a defined sequence of amino acid side-chains along the PNA backbone yields amphiphiles having a “protein code” that directs self-assembly into micellar architectures in aqueous conditions. However, these amphiphiles also carry a “nucleotide code” such that subsequent introduction of a complementary RNA strand induces a sequence-specific disruption of assemblies through hybridization. Together, these properties establish bilingual PNA as a powerful biopolymer that combines two information systems to harness structural responsiveness and sequence recognition. The PNA scaffold and our synthetic system are highly generalizable, enabling fabrication of a wide array of user-defined peptide and nucleotide sequence combinations for diverse future biomedical and nanotechnology applications. </p> </div> </div> </div>

scholarly journals Bilingual Peptide Nucleic Acids: Encoding the Languages of Nucleic Acids and Proteins in a Single Self-Assembling Biopolymer

2019 ◽  
Author(s):  
Colin Swenson ◽  
Arventh Velusamy ◽  
Hector Argueta-Gonzalez ◽  
Jennifer Heemstra
Keyword(s):  
Amino Acid ◽  
Nucleic Acid ◽  
Nucleic Acids ◽  
Self Assembly ◽  
Stimuli Responsive ◽  
Design Synthesis ◽  
Sequence Recognition ◽  
Potential Applications ◽  
Assembly Behavior ◽  
Aqueous Conditions

<div> <div> <div> <p>Nucleic acids and proteins are the fundamental biopolymers that support all life on Earth. Nucleic acids store large amounts of information in nucleobase sequences while peptides and proteins utilize diverse amino acid functional groups to adopt complex structures and perform wide-ranging activities. Although Nature has evolved machinery to read the nucleic acid code and translate it into amino acid code, the extant biopolymers are restricted to encoding amino acid or nucleotide sequences separately, limiting their potential applications in medicine and biotechnology. Here we describe the design, synthesis, and stimuli-responsive assembly behavior of a bilingual biopolymer that integrates both amino acid and nucleobase sequences into a single peptide nucleic acid (PNA) scaffold to enable tunable storage and retrieval of tertiary structural behavior and programmable molecular recognition capabilities. Incorporation of a defined sequence of amino acid side-chains along the PNA backbone yields amphiphiles having a “protein code” that directs self-assembly into micellar architectures in aqueous conditions. However, these amphiphiles also carry a “nucleotide code” such that subsequent introduction of a complementary RNA strand induces a sequence-specific disruption of assemblies through hybridization. Together, these properties establish bilingual PNA as a powerful biopolymer that combines two information systems to harness structural responsiveness and sequence recognition. The PNA scaffold and our synthetic system are highly generalizable, enabling fabrication of a wide array of user-defined peptide and nucleotide sequence combinations for diverse future biomedical and nanotechnology applications. </p> </div> </div> </div>

Self-Assembly of Hydrogels From Elastin-Mimetic Block Copolymers

2002 ◽  
Vol 724 ◽  
Author(s):  
Elizabeth R. Wright ◽  
R. Andrew McMillan ◽  
Alan Cooper ◽  
Robert P. Apkarian ◽  
Vincent P. Conticello
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Triblock Copolymers ◽  
Variable Temperature ◽  
Inverse Temperature ◽  
Temperature Transition ◽  
Scanning Calorimetry ◽  
Design Synthesis ◽  
Inverse Temperature Transition ◽  
Functional Biomaterials

AbstractTriblock copolymers have traditionally been synthesized with conventional organic components. However, triblock copolymers could be synthesized by the incorporation of two incompatible protein-based polymers. The polypeptides would differ in their hydrophobicity and confer unique physiochemical properties to the resultant materials. One protein-based polymer, based on a sequence of native elastin, that has been utilized in the synthesis of biomaterials is poly (Valine-Proline-Glycine-ValineGlycine) or poly(VPGVG) [1]. This polypeptide has been shown to have an inverse temperature transition that can be adjusted by non-conservative amino acid substitutions in the fourth position [2]. By combining polypeptide blocks with different inverse temperature transition values due to hydrophobicity differences, we expect to produce amphiphilic polypeptides capable of self-assembly into hydrogels. Our research examines the design, synthesis and characterization of elastin-mimetic block copolymers as functional biomaterials. The methods that are used for the characterization include variable temperature 1D and 2D High-Resolution-NMR, cryo-High Resolutions Scanning Electron Microscopy and Differential Scanning Calorimetry.

Self-Assembly of Single Chain Janus Nanoparticles from Azobenzene-Containing Block Copolymers and Reversible Photoinduced Morphology Transition

2021 ◽  
Author(s):  
Wei Wen ◽  
Aihua Chen
Keyword(s):  
Block Copolymers ◽  
Experimental Research ◽  
Self Assembly ◽  
The Self ◽  
Single Chain ◽  
Morphology Transition ◽  
Janus Nanoparticles ◽  
Assembly Behavior

Self-assembly of amphiphilic single chain Janus nanoparticles (SCJNPs) is a novel and promising approach to fabricate assemblies with diversified morphologies. However, the experimental research of the self-assembly behavior of SCJNPs...

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