scholarly journals Structure Effect of Diacid/Triacid on Self-Assembly of Binary Organogels Based on Glutamic Acid Amino Derivative

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Jinming Dai ◽  
Wei Hong ◽  
Youbo Di
Keyword(s):  
Citric Acid ◽  
Glutamic Acid ◽  
Organic Solvents ◽  
Self Assembly ◽  
Sebacic Acid ◽  
Amino Derivative ◽  
Molecular Structures ◽  
Diethyl Ester ◽  
Spectral Studies ◽  
Morphological Studies

The gelation behaviors of binary organogels composed of N-(4-aminobenzoyl)-L-glutamic acid diethyl ester with sebacic acid and citric acid in various organic solvents were designed and investigated. Their gelation behaviors in 20 solvents were tested as new binary organic gelators. It showed that the molecular structures and organic solvents have played a crucial role in the gelation behavior of all gelator mixtures. More carboxyl groups in molecular skeletons in the present mixture gelators are unfavorable for the gelation of organic solvents. The mixture containing sebacic acid can form 5 kinds of organogels, while another mixture containing citric acid can only form 3 kinds of organogels in different solvents. Morphological studies revealed that the gelator molecules self-assemble into different aggregates from wrinkle and belt to fiber with change of solvents. Spectral studies indicated that there existed different H-bond formations and hydrophobic forces, depending on solvents and molecular structures. The as-prepared nanomaterials have wide perspectives in nanoscience and functional textile materials with special microstructures.

scholarly journals Self-Assembly and Soft Material Preparation of Binary Organogels via Aminobenzimidazole/Benzothiazole and Acids with Different Alkyl Substituent Chains

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Tifeng Jiao ◽  
Keren Ma ◽  
Xihai Shen ◽  
Qingrui Zhang ◽  
Xiujin Li ◽  
...  
Keyword(s):  
Organic Solvents ◽  
Self Assembly ◽  
Alkyl Substituent ◽  
Soft Materials ◽  
Spectral Studies ◽  
Hydrophobic Force ◽  
Benzothiazole Derivatives ◽  
Morphological Studies ◽  
Gelation Behavior ◽  
Potential Applications

The gelation behaviors of binary organogels composed of aminobenzimidazole/benzothiazole derivatives and benzoic acid with single-/multialkyl substituent chain in various organic solvents were designed and investigated. Their gelation behaviors in 20 solvents were tested as new binary organic gelators. This showed that the number and length of alkyl substituent chains and benzimidazole/benzothiazole segment have played a crucial role in the gelation behavior of all gelator mixtures in various organic solvents. More alkyl chains in molecular skeletons in present gelators are favorable for the gelation of organic solvents. The length of alkyl substituent chains has also played an important role in changing the gelation behaviors and assembly states. Morphological studies revealed that the gelator molecules self-assemble into different aggregates from wrinkle, lamella, belt, to fiber with change of solvents. Spectral studies indicated that there existed different H-bond formation and hydrophobic force, depending on benzimidazole/benzothiazole segment and alkyl substituent chains in molecular skeletons. The prepared nanostructured materials have wide perspectives and many potential applications in nanoscience and material fields due to their scientific values. The present work may also give new clues for designing new binary organogelators and soft materials.

scholarly journals Preparation and Characterization of Binary Organogels via Some Azobenzene Amino Derivatives and Different Fatty Acids: Self-Assembly and Nanostructures

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Haiying Guo ◽  
Tifeng Jiao ◽  
Xihai Shen ◽  
Qingrui Zhang ◽  
Adan Li ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Organic Solvents ◽  
Self Assembly ◽  
Alkyl Substituent ◽  
Soft Materials ◽  
Spectral Studies ◽  
Hydrophobic Force ◽  
Alkyl Chains ◽  
Morphological Studies ◽  
Amino Derivatives

In present work the gelation behaviors of binary organogels composed of azobenzene amino derivatives and fatty acids with different alkyl chains in various organic solvents were designed and investigated. Their gelation behaviors in 20 solvents were tested as new binary organic gelators. It showed that the length of alkyl substituent chains and azobenzene segment have played a crucial role in the gelation behavior of all gelator mixtures in various organic solvents. Longer alkyl chains in molecular skeletons in present gelators are favorable for the gelation of organic solvents. Morphological studies revealed that the gelator molecules self-assemble into different aggregates from lamella, wrinkle, to belt with change of solvents. Spectral studies indicated that there existed different H-bond formation and hydrophobic force, depending on different substituent chains in molecular skeletons. The present work may also give new perspectives for designing new binary organogelators and soft materials.

scholarly journals Nanostructures and Self-Assembly of Organogels via Benzimidazole/Benzothiazole Imide Derivatives with Different Alkyl Substituent Chains

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Xihai Shen ◽  
Tifeng Jiao ◽  
Qingrui Zhang ◽  
Haiying Guo ◽  
Yaopeng Lv ◽  
...  
Keyword(s):  
Organic Solvents ◽  
Self Assembly ◽  
Bond Formation ◽  
Alkyl Substituent ◽  
Soft Materials ◽  
Molecular Structures ◽  
Spectral Studies ◽  
Hydrophobic Force ◽  
Alkyl Chains ◽  
Gelation Behavior

New benzimidazole/benzothiazole imide derivatives with different alkyl substituent chains were designed and synthesized. Their gelation behaviors in 22 solvents were tested as novel low-molecular-mass organic gelators. The test showed that the alkyl substituent chains and headgroups of benzimidazole/benzothiazole residues in gelators played a crucial role in the gelation behavior of all compounds in various organic solvents. More alkyl chains in molecular skeletons in present gelators are favorable for the gelation of organic solvents. SEM and AFM observations revealed that the gelator molecules self-assemble into different aggregates from wrinkle, lamella and belt to dot with change of solvents. Spectral studies indicated that there existed different H-bond formation between imide groups and hydrophobic force of alkyl substituent chains in molecular skeletons. The present work may give some insights into design and character of new organogelators and soft materials with special molecular structures.

Investigation on Self-Assembly in Binary Organogels Containing Benzimidazole/Benzothiazole and Alkyl Substituent Acids

2013 ◽  
Vol 368-370 ◽  
pp. 752-755
Author(s):  
Ai Xin Liu
Keyword(s):  
Benzoic Acid ◽  
Organic Solvents ◽  
Self Assembly ◽  
Crucial Role ◽  
Alkyl Substituent ◽  
Alkyl Chains ◽  
Benzothiazole Derivatives ◽  
Morphological Studies ◽  
Gelation Behavior

The gelation behaviors and self-assembly of organogels composed of benzimidazole/benzothiazole derivatives and benzoic acid with single/multi-alkyl substituent chain in various organic solvents were investigated. Their gelation behaviors in 20 solvents were tested as new organic gelators. It showed that the number and length of alkyl substituent chains, and benzimidazole/benzothiazole segment, have played a crucial role in the gelation behavior of all gelator mixtures in various organic solvents. More alkyl chains in molecular skeletons in present gelators are favorable for the gelation of organic solvents. The length of alkyl substituent chains has also played an important role in changing the gelation behaviors and assembly states. Morphological studies revealed that the gelator molecules self-assemble into different aggregates from wrinkle, lamella, belt, to fiber with change of solvents.

scholarly journals Fine-Tuning of Molecular Structures to Generate Carbohydrate Based Super Gelators and Their Applications for Drug Delivery and Dye Absorption

Gels ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. 134
Author(s):  
Jonathan Bietsch ◽  
Mary Olson ◽  
Guijun Wang
Keyword(s):  
Drug Delivery ◽  
Aqueous Solutions ◽  
Organic Solvents ◽  
Self Assembly ◽  
Variable Temperature ◽  
Molecular Structures ◽  
Fine Tuning ◽  
Assembly Mechanism ◽  
Amide Derivatives ◽  
Structural Connection

Carbohydrate-based low molecular weight gelators (LMWGs) exhibit many desirable properties making them useful in various fields including applications as drug delivery carriers. In order to further understand the structural connection to gelation properties, especially the influence of halide substitutions, we have designed and synthesized a series of para-chlorobenzylidene acetal protected D-glucosamine amide derivatives. Fifteen different amides were synthesized, and their self-assembling properties were assessed in multiple organic solvents, as well as mixtures of organic solvents with water. All derivatives were found to be gelators for at least one solvent and majority formed gels in multiple solvents at concentrations lower than 2 wt%. A few derivatives rendered remarkably stable gels in aqueous solutions at concentrations below 0.1 wt%. The benzamide 13 formed gels in water and in EtOH/H2O (v/v 1:2) at 0.36 mg/mL. The gels were characterized using optical microscopy and atomic force microscopy, and the self-assembly mechanism was probed using variable temperature 1H-NMR spectroscopy. Gel extrusion studies using H2O/DMSO gels successfully printed lines of gels on glass slides, which retained viscoelasticity based on rheology. Gels formed by the benzamide 13 were used for encapsulation and the controlled release of chloramphenicol and naproxen, as well as for dye removal for toluidine blue aqueous solutions.

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.

Large Scale Supramolecular Self-Assembly of Graft-Copolymers Prepared by Rapid Evaporation of Organic Solvents

1999 ◽  
Vol 28 (11) ◽  
pp. 1221-1222 ◽  
Author(s):  
Akio Kishida ◽  
Fusako Seto ◽  
Ken-ichiro Hiwatari ◽  
Takeshi Serizawa ◽  
Youichiro Muraoka ◽  
...  
Keyword(s):  
Organic Solvents ◽  
Self Assembly ◽  
Large Scale ◽  
Graft Copolymers

scholarly journals Self-assembly of arene ruthenium acylpyrazolone fragments to tetranuclear metallacycles. Molecular structures and solid-state 15N CPMAS NMR correlations

2016 ◽  
Vol 45 (9) ◽  
pp. 3974-3982 ◽  
Author(s):  
Riccardo Pettinari ◽  
Fabio Marchetti ◽  
Claudio Pettinari ◽  
Francesca Condello ◽  
Brian W. Skelton ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Self Assembly ◽  
Solid State Nmr ◽  
Molecular Structures ◽  
Sandwich Complexes ◽  
Solid State Nmr Spectroscopy ◽  
Half Sandwich

Mono- and tetranuclear Ru(ii) half-sandwich complexes containing acylpyrazolone ligands. 13C and 15N solid state NMR spectroscopy.

Fullerene-Gold Core-Shell Structures and Their Self-Assemblies

2017 ◽  
Vol 16 (02) ◽  
pp. 1650029
Author(s):  
R. Sepahvand ◽  
S. Alihosseini ◽  
M. Adeli ◽  
P. Sasanpour
Keyword(s):  
Citric Acid ◽  
Self Assembly ◽  
Size Structure ◽  
Shell Structures ◽  
Core Shell ◽  
Hybrid Nanomaterial ◽  
Gold Core ◽  
Transmission Electron ◽  
Vis Spectroscopy ◽  
Gold Nps

Hybrid nanomaterials consisting of functionalized fullerene and gold nanoparticle (NP) have been synthesized. Fullerene was functionalized by citric acid and used as reducing and capping agent for preparation of gold NPs. Functionalization of fullerene by use of citric acid was performed by enzymatic and thermal approaches. The core-shell structures containing gold NPs as core and fullerene as shell (gold/fullerene) were prepared. It was found that method and density of functionalization of fullerene effect final structure and therefore their physicochemical property of hybrid nanomaterial dramatically. Ultraviolet-visible (UV-Vis) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, dynamic light scattering (DLS), atomic force microscopy (AFM), transmission electron microscopy (TEM) were used to analyze the structure of the synthesized hybrid nanomaterial and also study their self-assembly and physicochemical properties. Effect of the size, structure and morphology (e.g., agglomeration) of the synthesized hybrid nanomaterial on their UV-Vis absorption behavior has been also verified by theoretical modeling.

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