Novel Hydrogen-Bonding Cross-Linking Aggregation-Induced Emission: Water as a Fluorescent “Ribbon” Detected in a Wide Range

2017 ◽  
Vol 9 (18) ◽  
pp. 15744-15757 ◽  
Author(s):  
Ani Wang ◽  
Ruiqing Fan ◽  
Yuwei Dong ◽  
Yang Song ◽  
Yuze Zhou ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Cross Linking ◽  
Aggregation Induced Emission ◽  
Wide Range

A fluorescent “glue” of water triggered by hydrogen-bonding cross-linking

2016 ◽  
Vol 4 (47) ◽  
pp. 11050-11054 ◽  
Author(s):  
Dejia Wang ◽  
Hongwei Zhao ◽  
Hongjuan Li ◽  
Shiguo Sun ◽  
Yongqian Xu
Keyword(s):  
Hydrogen Bonding ◽  
Organic Solvents ◽  
Organic Molecule ◽  
Linear Range ◽  
Cross Linking ◽  
The Novel ◽  
Aggregation Induced Emission ◽  
Small Organic Molecule ◽  
Wide Linear Range ◽  
Trace Water

As a “glue” of water, a small organic molecule with the novel hydrogen-bonding cross-linked aggregation-induced emission (AIE) property was designed to detect trace water, displaying a wide linear range (0–40%, v/v) in most of the organic solvents.

scholarly journals Bioactive potential of natural biomaterials: identification, retention and assessment of biological properties

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Kieran Joyce ◽  
Georgina Targa Fabra ◽  
Yagmur Bozkurt ◽  
Abhay Pandit
Keyword(s):  
Tissue Engineering ◽  
Therapeutic Potential ◽  
Biological Properties ◽  
Biological Assessment ◽  
Cross Linking ◽  
Natural Polymers ◽  
Drug Delivery Device ◽  
Biomedical Device ◽  
Wide Range ◽  
Bioactive Potential

AbstractBiomaterials have had an increasingly important role in recent decades, in biomedical device design and the development of tissue engineering solutions for cell delivery, drug delivery, device integration, tissue replacement, and more. There is an increasing trend in tissue engineering to use natural substrates, such as macromolecules native to plants and animals to improve the biocompatibility and biodegradability of delivered materials. At the same time, these materials have favourable mechanical properties and often considered to be biologically inert. More importantly, these macromolecules possess innate functions and properties due to their unique chemical composition and structure, which increase their bioactivity and therapeutic potential in a wide range of applications. While much focus has been on integrating these materials into these devices via a spectrum of cross-linking mechanisms, little attention is drawn to residual bioactivity that is often hampered during isolation, purification, and production processes. Herein, we discuss methods of initial material characterisation to determine innate bioactivity, means of material processing including cross-linking, decellularisation, and purification techniques and finally, a biological assessment of retained bioactivity of a final product. This review aims to address considerations for biomaterials design from natural polymers, through the optimisation and preservation of bioactive components that maximise the inherent bioactive potency of the substrate to promote tissue regeneration.

Structure–property–function relationship of fluorescent conjugated microporous polymers

2021 ◽  
Author(s):  
M. G. Monika Bai ◽  
H. Vignesh Babu ◽  
V. Lakshmi ◽  
M. Rajeswara Rao
Keyword(s):  
Long Range ◽  
Structure Property ◽  
Porous Organic Polymers ◽  
Aggregation Induced Emission ◽  
Microporous Polymers ◽  
Exciton Migration ◽  
Wide Range ◽  
Function Relationship ◽  
Relationship Of ◽  
Conjugated Microporous Polymers

Fluorescent porous organic polymers are a unique class of materials owing to their strong aggregation induced emission, long range exciton migration and permanent porosity, thus envisioned to possess a wide range of applications (sensing, OLEDs).

Sorption of Caustic Solution by Formaldehyde-Crosslinked Cottons

1969 ◽  
Vol 39 (11) ◽  
pp. 1023-1030 ◽  
Author(s):  
Edith Honold ◽  
Stanley P. Rowland ◽  
James N. Grant
Keyword(s):  
Caustic Solution ◽  
Cotton Fibers ◽  
Cross Linking ◽  
Centrifuge Test ◽  
Fiber Structure ◽  
Formaldehyde Content ◽  
Related Data ◽  
Wide Range ◽  
Cross Links ◽  
The Cross

Differences in the ability of formaldehyde-crosslinked cotton fibers to swell are demonstrated in terms of alkali centrifuge values (ACV), i.e., the sorption of caustic solution of mercerizing strength. The wide range in ACV (310–50) emphasizes the extremes in sorptivity that can be achieved by differences in formaldehyde content and in method of introducing the cross links. In general, the ACV decreases with increasing formaldehyde content. However, ACV higher than that of the noncross-linked control cotton are reached for those samples in which a low percentage of formaldehyde was introduced into water-swollen fibers. Various hypotheses, based on ACV and related data, are presented pertaining to the alterations in fiber structure during the cross-linking processes and during the alkali swelling centrifuge test

Hydrogen-bond patterns in 1,4-dihydro-2,3-quinoxalinediones: ligands for the glycine modulatory site on the NMDA receptor

1996 ◽  
Vol 52 (3) ◽  
pp. 487-499 ◽  
Author(s):  
M. Kubicki ◽  
T. W. Kindopp ◽  
M. V. Capparelli ◽  
P. W. Codding
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Binding Site ◽  
Three Dimensional ◽  
Hydrogen Bonding Pattern ◽  
Wide Range ◽  
Show Evidence ◽  
Additional Hydrogen Bond ◽  
Hydrogen Bond Patterns ◽  
Solvent Molecules

The crystal structures of five 1,4-dihydro-2,3-quinoxalinediones, antagonists of the NMDA modulatory glycine binding site on the excitary amino acid (EAA) receptor complex, have been determined: (I) 6,7-dinitro-1,4-dihydro-2,3-quinoxalinedione (DNQX); (II) 5,7-dinitro-1,4-dihydro-2,3-quinoxalinedione (MNQX); (III) 6-nitro-1,4-dihydro-2,3-quinoxalinedione hydrate; (IV) 6,7-dichloro-1,4-dihydro-2,3-quinoxalinedione; (V) 5,7-dichloro-1,4-dihydro-2,3-quinoxalinedione dimethylformamide. The crystal structure of the most active compound (II) contains a unique intramolecular N—H...O(NO2) hydrogen bond, which may be important for activity, as semiempirical calculations show that this bond is stable over a wide range of dihedral angles between the planes of the molecule and of the nitro group. In the other compounds the intermolecular hydrogen bonds connect molecules into three-dimensional networks. In compounds (I), (III) and (IV) head-to-tail: π-stacking is found between molecules connected by a center of symmetry. The geometries of the hydrogen-bonded —NH—C=O fragments show evidence of π-cooperativity or resonance-assisted hydrogen bonding. Graph-set analysis of the hydrogen-bond patterns of quinoxalinedione derivatives shows a tendency to form two types of hydrogen-bonding motifs: a centrosymmetric dimeric ring and an infinite chain. Even though this pattern may be modified by the presence of additional hydrogen-bond acceptors and/or donors, as well as by solvent molecules, general similarities have been found. Comparison of all quinoxalinedione structures suggests that the hydrogen-bonding pattern necessary for the biological activity at the glycine binding site contains one donor and two acceptors.

scholarly journals Aggregation induced emission of a new naphthyridine-ethynyl–gold(i) complex as a potential tool for sensing guanosine nucleotides in aqueous media

2020 ◽  
Vol 49 (1) ◽  
pp. 171-178
Author(s):  
Artur J. Moro ◽  
João Avó ◽  
Marc Malfois ◽  
Francesco Zaccaria ◽  
Célia Fonseca Guerra ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Aqueous Media ◽  
Aggregation Induced Emission ◽  
Potential Tool

A new organometallic alkynyl–gold(i) complex exhibiting aggregation induced emission is capable of sensing Guanosine nucleotides via complementary hydrogen bonding in aqueous media.

Thermoreversible Cross-Linking of Maleated Ethylene/Propylene Copolymers Using Hydrogen-Bonding and Ionic Interactions

2006 ◽  
Vol 39 (9) ◽  
pp. 3441-3449 ◽  
Author(s):  
C. X. Sun ◽  
M. A. J. van der Mee ◽  
J. G. P. Goossens ◽  
M. van Duin
Keyword(s):  
Hydrogen Bonding ◽  
Ionic Interactions ◽  
Cross Linking ◽  
Ethylene Propylene

scholarly journals Chemical Stabilisation of Collagen as a Biomimetic

2003 ◽  
Vol 3 ◽  
pp. 138-155 ◽  
Author(s):  
R. Gordon Paul ◽  
Allen J. Bailey
Keyword(s):  
The Body ◽  
Collagen Molecule ◽  
Cross Linking ◽  
Amino Acid Residues ◽  
Specific Amino Acid ◽  
High Mechanical Strength ◽  
Stable Chemical ◽  
Wide Range ◽  
Recombinant Polypeptides ◽  
Chemical Cross Linking

Collagen is the most abundant protein in animals and because of its high mechanical strength and good resistance to degradation has been utilized in a wide range of products in industry whilst its low antigenicity has resulted in its widespread use in medicine. Collagen products can be purified from fibres, molecules reconstituted as fibres or from specific recombinant polypeptides with preferred properties. A common feature of all these biomaterials is the need for stable chemical cross-linking to control the mechanical properties and the residence time in the body, and to some extent the immunogenicity of the device. This can be achieved by a number of different cross-linking agents that react with specific amino acid residues on the collagen molecule imparting individual biochemical, thermal and mechanical characteristics to the biomaterial. In this review we have summarised the major techniques for testing these characteristics and the mechanisms involved in the variety of cross-linking reactions to achieve particular properties..

Theoretical Insights into the Aggregation-Induced Emission by Hydrogen Bonding: A QM/MM Study

2012 ◽  
Vol 116 (15) ◽  
pp. 3881-3888 ◽  
Author(s):  
Qunyan Wu ◽  
Qian Peng ◽  
Yingli Niu ◽  
Xing Gao ◽  
Zhigang Shuai
Keyword(s):  
Hydrogen Bonding ◽  
Aggregation Induced Emission
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