Investigation an environmentally friendly method under magnetic field as a green solvent for the synthesis of brookite phase nanoparticles at room temperature

Abstract TiO2 nanoparticles in the brookite phase were synthesized within an environmentally friendly method by magnetized water obtained by the US-patent magnetizing device (US10507450B2), which changes the properties of all types of the solvents with no limitation (protic or aprotic). Furthermore, this study is the first report on the synthesis of brookite TiO2 nanoparticle through magnetized water at room temperature. The procedure was tested by five different water; ordinary, 15, 30, 45, and 60min-magnetized water. The products were analyzed by various techniques including XRD, FESEM, ICP, BJH-plot, t-plot, Langmuir plot, BET, TEM, and FTIR. The result showed that the products obtained from 30 min-magnetized water were the most properly indexed TiO2 brookite phase with high surface activity. This sample could be a suitable green photocatalyst.

Download Full-text

Synthesis of (2-Aminophenyl)(naphthalen-2-yl)methanones via Intramolecular Rearrangement of (E)-3-Styrylquinolin-4(1H)-ones under Irradiation with 365 nm UV Light

Synlett ◽

10.1055/s-0037-1610176 ◽

2018 ◽

Vol 29 (12) ◽

pp. 1578-1582 ◽

Cited By ~ 1

Author(s):

Zunting Zhang ◽

Sisi Jing ◽

Yun He ◽

Tao Wang ◽

Jin Zhang ◽

...

Keyword(s):

Transition Metal ◽

Room Temperature ◽

Uv Light ◽

Environmentally Friendly ◽

Intramolecular Rearrangement ◽

Green Solvent ◽

Highly Efficient ◽

Catalyzed Reactions ◽

Metal Catalyzed ◽

High Yields

A highly efficient and environmentally friendly synthesis of (2-aminophenyl)(naphthalen-2-yl)methanones was developed. The (2-aminophenyl)(naphthalen-2-yl)methanone derivatives were obtained in high yields (up to 96%) by the irradiation of (E)-3-styrylquinolin-4(1H)-ones in EtOH–H2O (7:1) with UV light (365 nm) at room temperature under Ar atmosphere. The demonstrated photoinduced intramolecular rearrangement has advantages over other transition-metal-catalyzed reactions, e.g. no requirement of additives, green solvent, broad substrate scope, and high atom efficiency.

Download Full-text

Anthranilic acids from isatin: an efficient, versatile and environmentally friendly method

Anais da Academia Brasileira de Ciências ◽

10.1590/0001-3765201520140289 ◽

2015 ◽

Vol 87 (3) ◽

pp. 1525-1529 ◽

Cited By ~ 6

Author(s):

GABRIEL F. RIO ◽

BÁRBARA V. SILVA ◽

SABRINA T. MARTINEZ ◽

ANGELO C. PINTO

Keyword(s):

Reaction Time ◽

Nitrogen Atom ◽

Aromatic Ring ◽

Room Temperature ◽

Environmentally Friendly ◽

Reaction Conditions ◽

Anthranilic Acids ◽

Environmentally Friendly Method

This paper describes the preparation of a series of 16 anthranilic acids in yields ranging from 51 to 97%, by treating the isatins with NaOH and H2O2. Independently of the nature of the substituent on the aromatic ring, the reactions were complete in 15 min at room temperature, whereas those of isatins containing a substituent on the nitrogen atom required longer reaction time for completion (45 min) under the same reaction conditions.

Download Full-text

Iron or boron-catalyzed C–H arylthiation of substituted phenols at room temperature

Chemical Communications ◽

10.1039/c4cc03600j ◽

2014 ◽

Vol 50 (64) ◽

pp. 8875-8877 ◽

Cited By ~ 53

Author(s):

Hua Tian ◽

Changjin Zhu ◽

Haijun Yang ◽

Hua Fu

Keyword(s):

Room Temperature ◽

Environmentally Friendly ◽

Substituted Phenols ◽

Environmentally Friendly Method

A simple, efficient and environmentally friendly method for iron or boron-catalyzed C–H arylthiation of substituted phenols at room temperature has been developed, and the corresponding diaryl sulfides were prepared in good to excellent yields.

Download Full-text

Study on a polyacrylate-based waterborne coating: facile preparation, convenient self-healing behavior and photoluminescence properties

Journal of Materials Chemistry C ◽

10.1039/d0tc03407j ◽

2020 ◽

Vol 8 (36) ◽

pp. 12638-12647

Author(s):

Bo Wu ◽

Anqian Yuan ◽

Yao Xiao ◽

Yi Wang ◽

Jingxin Lei

Keyword(s):

Room Temperature ◽

Environmentally Friendly ◽

Waterborne Coating ◽

Self Healing ◽

Photoluminescence Properties ◽

Facile Preparation ◽

Environmentally Friendly Method

A facile and environmentally friendly method towards mechanically robust, highly transparent, room temperature self-healing coatings.

Download Full-text

A versatile method to prepare size- and shape-controlled copper nanocubes using an aqueous phase green synthesis

RSC Advances ◽

10.1039/c6ra17037d ◽

2016 ◽

Vol 6 (94) ◽

pp. 91949-91955 ◽

Cited By ~ 11

Author(s):

Thulitha Abeywickrama ◽

Niharika Neerudu Sreeramulu ◽

Lan Xu ◽

Hemali Rathnayake

Keyword(s):

Aqueous Solution ◽

Green Synthesis ◽

Aqueous Phase ◽

Room Temperature ◽

Environmentally Friendly ◽

Size And Shape ◽

Controlled Morphology ◽

Shape Controlled ◽

Environmentally Friendly Method

A versatile, simple, and environmentally friendly method of preparing copper nanocubes with controlled morphology in aqueous solution at room temperature is demonstrated to make Cu nanocubes with sizes of 100 ± 35 nm.

Download Full-text

Application of beta zeolite in allylation reaction aiming formation of new C-C bonds

Cerâmica ◽

10.1590/0366-69132020663792553 ◽

2020 ◽

Vol 66 (379) ◽

pp. 243-249

Author(s):

V. K. S. A. Macedo ◽

C. S. Santos ◽

M. I. S. de Mello ◽

J. A. B. L. R. Alves ◽

J. M. F. Barros ◽

...

Keyword(s):

Green Chemistry ◽

Room Temperature ◽

Reaction Times ◽

Environmentally Friendly ◽

Zeolite Beta ◽

Beta Zeolite ◽

Reaction Cycle ◽

Homoallylic Alcohols ◽

Environmentally Friendly Method

Abstract This study describes the formation of new C-C bonds through the allylation reaction of different aldehydes promoted by beta zeolite. This environmentally friendly method was characterized by its efficiency, versatility, and chemoselectivity in the formation of different homoallylic alcohols. Homoallylic alcohols were obtained in good yields (80% to 96%), short reaction times (30 to 75 min) at room temperature, and without the need for additional purifications. In addition, water was used as a co-solvent, ensuring the method a development in the field of green chemistry. Moreover, it was found that the zeolite beta can be reused for up to one reaction cycle without loss of its efficiency.

Download Full-text

Arene Dearomatization via Radical Hydroarylation

10.26434/chemrxiv.9874454 ◽

2019 ◽

Cited By ~ 1

Author(s):

Autumn Flynn ◽

Kelly McDaniel ◽

Meredith Hughes ◽

David Vogt ◽

Nathan Jui

Keyword(s):

Precious Metal ◽

Room Temperature ◽

Aryl Halide ◽

Solvent System ◽

Benzene Derivatives ◽

Green Solvent ◽

Photocatalytic System

A photocatalytic system for the dearomative hydroarylation of benzene derivatives has been developed. Using a combination of an organic photoredox catalyst and an amine reductant, this process operates through a reductive radical-polar crossover mechanism where aryl halide reduction triggers a regioselective cyclization event, giving rise to a range of complex spirocyclic cyclohexadienes. This light-driven protocol functions at room temperature in a green solvent system (aq. MeCN), without the need for precious metal-based catalysts or reagents, or the generation of stoichiometric metal byproducts.

Download Full-text

All organic multiferroic magnetoelectric complexes with strong interfacial spin-dipole interaction

npj Flexible Electronics ◽

10.1038/s41528-021-00120-0 ◽

2021 ◽

Vol 5 (1) ◽

Author(s):

Yuying Yang ◽

Zhiyan Chen ◽

Xiangqian Lu ◽

Xiaotao Hao ◽

Wei Qin

Keyword(s):

Magnetic Field ◽

Light Intensity ◽

Room Temperature ◽

Incident Light ◽

Dipole Interaction ◽

Interfacial Interaction ◽

Magnetoelectric Coupling ◽

Incident Light Intensity ◽

Organic Ferromagnets ◽

Magnetoelectric Coefficient

AbstractThe organic magnetoelectric complexes are beneficial for the development on flexible magnetoelectric devices in the future. In this work, we fabricated all organic multiferroic ferromagnetic/ferroelectric complexes to study magnetoelectric coupling at room temperature. Under the stimulus of external magnetic field, the localization of charge inside organic ferromagnets will be enhanced to affect spin–dipole interaction at organic multiferroic interfaces, where overall ferroelectric polarization is tuned to present an organic magnetoelectric coupling. Moreover, the magnetoelectric coupling of the organic ferromagnetic/ferroelectric complex is tightly dependent on incident light intensity. Decreasing light intensity, the dominated interfacial interaction will switch from spin–dipole to dipole–dipole interaction, which leads to the magnetoelectric coefficient changing from positive to negative in organic multiferroic magnetoelectric complexes.

Download Full-text

Review of Multi-Physics Modeling on the Active Magnetic Regenerative Refrigeration

Mathematical and Computational Applications ◽

10.3390/mca26020047 ◽

2021 ◽

Vol 26 (2) ◽

pp. 47

Author(s):

Julien Eustache ◽

Antony Plait ◽

Frédéric Dubas ◽

Raynal Glises

Keyword(s):

Magnetic Field ◽

Low Temperatures ◽

Room Temperature ◽

State Of The Art ◽

Vapor Compression ◽

Crucial Step ◽

Potential Alternative ◽

Vapor Compression Refrigeration ◽

Preliminary Study ◽

Physics Modeling

Compared to conventional vapor-compression refrigeration systems, magnetic refrigeration is a promising and potential alternative technology. The magnetocaloric effect (MCE) is used to produce heat and cold sources through a magnetocaloric material (MCM). The material is submitted to a magnetic field with active magnetic regenerative refrigeration (AMRR) cycles. Initially, this effect was widely used for cryogenic applications to achieve very low temperatures. However, this technology must be improved to replace vapor-compression devices operating around room temperature. Therefore, over the last 30 years, a lot of studies have been done to obtain more efficient devices. Thus, the modeling is a crucial step to perform a preliminary study and optimization. In this paper, after a large introduction on MCE research, a state-of-the-art of multi-physics modeling on the AMRR cycle modeling is made. To end this paper, a suggestion of innovative and advanced modeling solutions to study magnetocaloric regenerator is described.

Download Full-text