Structural aspects, conformational preference and other physico-chemical properties of Artesunate and the formation of self-assembly with graphene quantum dots: A first principle analysis and surface enhancement of Raman activity investigation

AbstractPhotophysical and photochemical properties of graphene quantum dots (GQDs) strongly depend on their morphological and chemical features. However, systematic and uniform manipulation of the chemical structures of GQDs remains challenging due to the difficulty in simultaneous control of competitive reactions, i.e., growth and doping, and the complicated post-purification processes. Here, we report an efficient and scalable production of chemically tailored N-doped GQDs (NGs) with high uniformity and crystallinity via a simple one-step solvent catalytic reaction for the thermolytic self-assembly of molecular precursors. We find that the graphitization of N-containing precursors during the formation of NGs can be modulated by intermolecular interaction with solvent molecules, the mechanism of wh ich is evidenced by theoretical calculations and various spectroscopic analyses. Given with the excellent visible-light photoresponse and photocatalytic activity of NGs, it is expected that the proposed approach will promote the practical utilization of GQDs for various applications in the near future.

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Topological aspects of some dendrimer structures

Nanotechnology Reviews ◽

10.1515/ntrev-2017-0184 ◽

2018 ◽

Vol 7 (2) ◽

pp. 123-129 ◽

Cited By ~ 14

Author(s):

Adnan Aslam ◽

Muhammad Kamran Jamil ◽

Wei Gao ◽

Waqas Nazeer

Keyword(s):

Self Assembly ◽

Molecular Graph ◽

Chemical Properties ◽

Topological Indices ◽

Connectivity Index ◽

Molecular Topology ◽

Zinc Porphyrin ◽

Physico Chemical ◽

Randić Connectivity Index ◽

Atom Bond

AbstractA numerical number associated to the molecular graphGthat describes its molecular topology is called topological index. In the study ofQSARandQSPR, topological indices such as atom-bond connectivity index, Randić connectivity index, geometric index, etc. help to predict many physico-chemical properties of the chemical compound under study. Dendrimers are macromolecules and have many applications in chemistry, especially in self-assembly procedures and host-guest reactions. The aim of this report is to compute degree-based topological indices, namely the fourth atom-bond connectivity index and fifth geometric arithmetic index of poly propyl ether imine, zinc porphyrin, and porphyrin dendrimers.

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One-pot synthesis of graphene quantum dots and simultaneous nanostructured self-assembly via a novel microwave-assisted method: impact on triazine removal and efficiency monitoring

RSC Advances ◽

10.1039/c8ra04286a ◽

2018 ◽

Vol 8 (52) ◽

pp. 29939-29946 ◽

Cited By ~ 8

Author(s):

Beatriz Fresco-Cala ◽

M. Laura Soriano ◽

Alice Sciortino ◽

Marco Cannas ◽

Fabrizio Messina ◽

...

Keyword(s):

Quantum Dots ◽

Quantum Dot ◽

Self Assembly ◽

Graphene Quantum Dots ◽

One Pot ◽

Graphene Quantum Dot ◽

Microwave Assisted ◽

Microwave Reaction ◽

One Step ◽

Microwave Assisted Method

Graphene quantum dot (GQDs) assemblies from a one-step microwave reaction as bifunctional materials in remediation of triazines.

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A srikaya-like light-harvesting antenna based on graphene quantum dots and porphyrin unimolecular micelles

Chemical Communications ◽

10.1039/c6cc03595g ◽

2016 ◽

Vol 52 (60) ◽

pp. 9394-9397 ◽

Cited By ~ 17

Author(s):

Yannan Liu ◽

Shanlong Li ◽

Ke Li ◽

Yongli Zheng ◽

Meng Zhang ◽

...

Keyword(s):

Quantum Dots ◽

Self Assembly ◽

Light Harvesting ◽

Graphene Quantum Dots ◽

Light Harvesting Antenna

A novel hybrid light-harvesting antenna with a srikaya-like structure of multi-graphene quantum dots (GQDs) as donors and one porphyrin unimolecular micelle as the acceptor was constructed through electrostatic self-assembly.

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Synthesis and Applications of Functional Nanomaterials

Journal of Physics Conference Series ◽

10.1088/1742-6596/2133/1/012006 ◽

2021 ◽

Vol 2133 (1) ◽

pp. 012006

Author(s):

Yujia Li ◽

Hanzheng Xia ◽

Jingyi Xu

Keyword(s):

Quantum Dots ◽

Graphene Quantum Dots ◽

Chemical Properties ◽

Research Progress ◽

Synthesis Methods ◽

Field Environment ◽

Application Potential ◽

Self Assembled ◽

Reflective Coatings ◽

Physical And Chemical

Abstract The unique physical and chemical properties and variable application potential of nanomaterials are continuously devoted to stimulating scientists’ studying enthusiasm. Extremely fine grains bring quantities excellent properties such as low density, low elastic modulus, high resistance and low thermal conductivity to nanomaterials, which has extensive use in the photoelectric field, environment, bioengineering and other fields. The research progress of graphene quantum dots, transparent reflective coatings and self-assembled nanotubes are mainly demonstrated. This paper shows the role of graphene quantum dots in solar cells, summarizes the synthesis methods of self-assembled nanotubes and their applications in bioengineering, and describes the development of transparent thermal reflective coatings for energy-saving glass attributed to providing relevant reference and basis for the development and research of nanomaterials.

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Quasi-Continuously Tuning the Size of Graphene Quantum Dots via an Edge-Etching Mechanism

MRS Advances ◽

10.1557/adv.2016.198 ◽

2016 ◽

Vol 1 (20) ◽

pp. 1459-1467 ◽

Cited By ~ 2

Author(s):

Shujun Wang ◽

Ivan S. Cole ◽

Dongyuan Zhao ◽

Qin Li

Keyword(s):

Quantum Dots ◽

Chemical Reactivity ◽

Quantum Confinement Effect ◽

Graphene Quantum Dots ◽

Chemical Properties ◽

Practical Applications ◽

Etching Mechanism ◽

Great Possibility ◽

Scientific Attention ◽

Physical And Chemical

ABSTRACTGraphene quantum dots (GQDs), a nano version of graphene whose interesting properties that distinguish them from bulk graphene, have recently received significant scientific attention. The quantum confinement effect referring to the size-dependence of physical and chemical properties opens great possibility in the practical applications of this material. However, tuning the size of graphene quantum dots is still difficult to achieve. Here, an edge-etching mechanism which is able to tune the size of GQDs in a quasi-continuous manner is discovered. Different from the ‘unzipping’ mechanism which has been adopted to cut bulk graphitic materials into small fragments and normally cut through the basal plane along the ‘zig-zag’ direction where epoxy groups reside, the mechanism discovered in this research could gradually remove the peripheral carbon atoms of nano-scaled graphene (i.e. GQDs) due to the higher chemical reactivity of the edge carbon atoms than that of inner carbon atoms thereby tuning the size of GQDs in a quasi-continuous fashion. It enables the facile manipulate of the size and properties of GQDs through controlling merely the reaction duration. It is also believed the as discovered mechanism could be generalized for synthesizing various sizes of GQDs from other graphitic precursors (e.g. carbon fibres, carbon nanotubes, etc).

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