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Sujay A Chopade, Evan L Anderson, Peter W Schmidt, Timothy P Lodge, Marc A Hillmyer, Philippe Bühlmann
Interfaces of ionic liquids and aqueous solutions exhibit stable electrical potentials over a wide range of aqueous electrolyte concentrations. This makes ionic liquids suitable as bridge materials that separate in electroanalytical measurements the reference electrode from samples with low and/or unknown ionic strengths. However, methods for the preparation of ionic liquid-based reference electrodes have not been explored widely. We have designed a convenient and reliable synthesis of ionic liquid-based reference electrodes by polymerization-induced microphase separation...
September 25, 2017: ACS Sensors
Carla E Brown, Tiffany Kong, James McNulty, Leonardo D'Aiuto, Kelly Williamson, Lora McClain, Paolo Piazza, Vishwajit L Nimgaonkar
The discovery of antiviral activity of 2,3-disubstituted quinazolinones, prepared by a one-pot, three-component condensation of isatoic anhydride with amines and aldehydes, against Herpes Simplex Virus (HSV)-1 is reported. Sequential iterative synthesis/antiviral assessment allowed structure-activity relationship (SAR) generation revealing synergistic structural features required for potent anti-HSV-1 activity. The most potent derivatives show greater efficacy than acyclovir against acute HSV-1 infections in neurons and minimal toxicity to the host...
September 14, 2017: Bioorganic & Medicinal Chemistry Letters
Salma Mukhtar, Izzah Shahid, Samina Mehnaz, Kauser A Malik
Biofertilizers are usually carrier-based inoculants containing beneficial microorganisms. Incorporation of microorganisms in carrier material enables easy-handling, long-term storage and high effectiveness of biofertilizers. Objective of the present study was to assess enriched biogas sludge and soil as biofertilizer carriers on growth and yield of wheat. Six phosphate solubilizing strains were used in this study. Three phosphate solubilizing strains, 77-NS2 (Bacillus endophyticus), 77-CS-S1 (Bacillus sphaericus) and 77-NS5 (Enterobacter aerogenes) were isolated from the rhizosphere of sugarcane, two strains, PSB5 (Bacillus safensis) and PSB12 (Bacillus megaterium) from the rhizosphere of wheat and one halophilic phosphate solubilizing strain AT2RP3 (Virgibacillus sp...
December 2017: Microbiological Research
Huaidong He, Nora F Y Tam, Aijun Yao, Rongliang Qiu, Wai Chin Li, Zhihong Ye
Contamination of rice (Oryza sativa) by Cd is of great concern. Steel slag could be used to amend Cd-contaminated soils and make them safe for cereal production. This work was conducted to study the effects of steel slag on Cd uptake and growth of rice plants in acidic and Cd-contaminated paddy soils and to determine the possible mechanisms behind these effects. Pot (rhizobag) experiments were conducted using rice plants grown on two acidic and Cd-contaminated paddy soils with or without steel slag amendment...
September 17, 2017: Chemosphere
Yi He, De Bin Jiang, Jie Chen, De Yi Jiang, Yu Xin Zhang
In this research, MnO2 nanosheets on montmorillonite (MnO2 nanosheets@MMt) was synthesized by one-pot hydrothermal method and characterized by X-ray diffraction, Fourier transform infrared spectra, nitrogen adsorption and scanning electron microscopy. It was found that honeycomb-like MnO2 nanosheets vertically grew on the surface of montmorillonite. MnO2 nanosheets@MMt exhibited high methylene blue (MB) removal rate, which reached 97.7% within 5min under the condition of pH 2, MnO2 nanosheets dosage of 0.1gL(-1) and initial dye concentration of 10mgL(-1)...
September 18, 2017: Journal of Colloid and Interface Science
M A Ahmed, Z M Abou-Gamra, H A A Medien, M A Hamza
As known, porphyrins have central role in photosynthesis, biological oxidation and reduction and oxygen transport beside to their intensive color which qualify them to be good photosensitizers. Herein, tetra (4-carboxyphenyl) porphyrin (TCPP) was prepared by a simple one-pot synthesis to use as a visible antenna for TiO2 nanoparticles that were prepared via a simple template-free sol-gel method. Various loading percentages of TCPP (0.05-1%) were incorporated on the surface of TiO2 as photosensitizer for photocatalytic degradation of Rhodamine B (Rh B) dye as a primary cationic pollutant model...
September 18, 2017: Journal of Photochemistry and Photobiology. B, Biology
Alisa Weber, Nina Fuchs, Susanne Kutzora, Lana Hendrowarsito, Uta Nennstiel-Ratzel, Erika von Mutius, Caroline Herr, Stefanie Heinze
OBJECTIVES: Asthma and allergic rhinitis are diseases which require special attention in childhood. Risk factors for these diseases are manifold and include environmental factors. Previous studies have shown associations between indoor mould and respiratory diseases in children. Besides indoor mould, organic waste storage, potted plants, pets and crowding could influence the microbial indoor environment at home and the respiratory health of children. Our aim was therefore to explore the associations of these factors with airway-related symptoms and respiratory diseases in preschoolers...
September 6, 2017: International Journal of Hygiene and Environmental Health
Jiliang Ci, Ye Tian, Shigenori Kuga, Zhongwei Niu, Min Wu, Yong Huang
The doping of nitrogen into carbon quantum dots was vitally important for improvement of fluorescence performance. However, the synthesis of nitrogen-doped carbon quantum dots (N-CQDs) was usually conducted under strong acid and high temperature, which would result in the environmental pollution and energy consumption. Herein, the N-CQDs were prepared by a mild one-pot hydrothermal process. The hydrothermal reaction temperature was adjusted to control the particle size, N/C atomic ratio and quantum yield. The products were water-soluble with narrow particle size distribution and good dispersion stability in wide pH range...
September 21, 2017: Chemistry, An Asian Journal
Shengzheng Wang, Zhongjie Guo, Shuqiang Chen, Yan Jiang, Fan Zhang, Xueying Liu, Weiping Chen, Chunquan Sheng
Asymmetric construction of tetrahydrothiophenes with four contiguous stereocenters remains a formidable challenge. Herein, the bottleneck was addressed by an unprecedented one-pot Michael-Henry-Cascade-Rearrangement reaction which could simultaneously create four consecutive stereogenic centers including two tetrasubstituted carbon stereocenters. The highly functionalized chiral spirotetrahydrothiophene scaffolds were assembled in moderate to good yield (54 ~ 79%), excellent diastereo- (>20: 1 dr) and enantio-selectivities (up to 93% ee)...
September 20, 2017: Chemistry: a European Journal
Xiaoxiao Yan, Yifan Chen, Sihui Deng, Yifan Yang, Zhenna Huang, Cunwang Ge, Lin Xu, Dongmei Sun, Gengtao Fu, Yawen Tang
Ultrathin Pt-based nanowires are considered as promising electrocatalysts due to their high atomic utilization efficiency and structural robustness. Moreover, integration of Pt-based nanowires with graphene oxide (GO) could further increase the electrocatalytic performance, yet remains challenging to date. Herein, we for the first time demonstrate the in situ synthesis of ultrathin PtCu nanowires grown over reduced GO (PtCu-NWs/rGO) via a one-pot hydrothermal approach with the aid of amine-terminated poly (N-isopropyl acrylamide) (PNIPAM-NH2)...
September 20, 2017: Chemistry: a European Journal
Jasmin Krüll, Anja Hubert, Natascha Nebel, Olaf Prante, Markus Rolf Heinrich
Substituted indoles can be prepared from phenylazo-carboxylates through a rapid one-pot sequence featuring a microwave-assisted Fischer indole synthesis as key step. As the phenylazocarboxylates may beforehand be modified by mild nucleophilic aromatic substitution, including the introduction of [18F]fluoride, the overall strategy offers an attractive new access to 5-[18F]fluoroindoles.
September 22, 2017: Chemistry: a European Journal
Yanqun Ning, Xiaobing Lou, Chao Li, Xiaoshi Hu, Bingwen Hu
The controllable synthesis and structural tailoring of nanostructured metal organic frameworks (MOFs) is of huge significance in boosting their potential for rechargeable batteries. We herein present the facile synthesis of cobalt-based ultrathin metal- organic framework nanosheets (referred as "u-CoTDA") by using 2, 5-thiophenedicarboxylic (H2TDA) as the organic building block through a one-pot ultrasonic method for the first time. The obtained u-CoTDA exhibits high reversible capacity (790 mAh g-1 after 400 cycles at 1 A g-1) and excellent rate capability (694 mAh g-1 at 2 A g-1), which outperforms its bulk counterpart...
September 21, 2017: Chemistry: a European Journal
Hongliang Tan, Song Guo, Ngoc-Duy Dinh, Rongcong Luo, Lin Jin, Chia-Hung Chen
In nature, individual cells contain multiple isolated compartments in which cascade enzymatic reactions occur to form essential biological products with high efficiency. Here, we report a cell-inspired design of functional hydrogel particles with multiple compartments, in which different enzymes are spatially immobilized in distinct domains that enable engineered, one-pot, tandem reactions. The dense packing of different compartments in the hydrogel particle enables effective transportation of reactants to ensure that the products are generated with high efficiency...
September 22, 2017: Nature Communications
Swetha K Maddili, Leela Prasad Yandrati, Shakuntala Siddam, Vijaya Kumar Kannekanti, Himabindu Gandham
A series of Mannich bases of imidazo[2, l-b]benzothiazoles were prepared through one-pot multi-component reaction in the presence of water as an eco-friendly solvent. All the synthesized compounds were confirmed from IR, (1)HNMR, (13)CNMR, and Mass spectroscopy. Evaluation of in vitro anti-inflammatory and anti-microbial activities of all the synthesized derivatives was further accomplished. These results clearly displayed that compound 6d exhibited outstanding anti-inflammatory activity with a percentage inhibition of 70...
August 19, 2017: Journal of Photochemistry and Photobiology. B, Biology
Xinxin Ye, Hongying Li, Ligan Zhang, Rushan Chai, Renfeng Tu, Hongjian Gao
Combinations of remediation technologies are needed to solve the problem of soil contamination in paddy rice, due to multiple potential toxic elements (PTEs). Two potential mitigation methods, water management and in-situ remediation by soil amendment, have been widely used in treatment of PTE-polluted paddy soil. However, the interactive relationship between soil amendment and water management, and its influence on the accumulation of PTEs in rice are poorly understood. Greenhouse pot experiments were conducted to examine the effects of phosphate amendment on Cd and Pb availability in soil and their influence on Cd and Pb uptake into rice, on Fe and P availability in soil, and on the alteration of Fe amount and compartment on root surface among different water management strategies...
September 19, 2017: Ecotoxicology and Environmental Safety
Qianfu Luo, Fei Cao, Chaochao Xiong, Qingyu Dou, Da-Hui Qu
How to efficiently design and synthesize multifunctional molecules is particularly challenging. Here we devote to constructing a kind of simple structures with composite functionalities through straightforward preparation. Starting from common commercially available materials, the titled cis/ tans-tetraarylethenes can be conveniently obtained by one-pot under mild conditions. The different configurations were confirmed by 1H NMR and single crystal data analysis. The trans-tetraarylethenes could be converted into cis-forms not only by photo-irradiation but also by microwave irradiation, which provided us a new choice for isomeric conversion, especially for which sensitive to light...
September 22, 2017: Journal of Organic Chemistry
Vikram Singh, Pengtao Ma, Michael G B Drew, Jingyang Niu, Jingping Wang, Guo-Xin Jin
Polyoxometalates (POMs), emerging as a new class of porous molecular materials, play a promising role in homo- and heterogeneous catalysis. Among them, noble-metal-decorated POMs have a profound impact as catalytic materials. Thus, it is imperative to design and structurally explore new catalysts including noble metals. Herein, two new clusters, H3[(Cp*Rh)4PMo8O32]·14H2O (1) and H5[Na2(Cp*Ir)4PMo8O34]·13H2O (2) (Cp* = pentamethylcyclopentadienyl), based on a heterooctamolybdate anionic core were successfully obtained via a one-pot reaction using [Cp*MCl2]2 [M = Rh (1) and Ir (2)] and Na2MoO4 in acidic conditions...
September 22, 2017: Inorganic Chemistry
Jérôme Roeser, Dragica Prill, Michael J Bojdys, Pierre Fayon, Abbie Trewin, Andrew N Fitch, Martin U Schmidt, Arne Thomas
Crystalline frameworks composed of hexacoordinate silicon species have thus far only been observed in a few high pressure silicate phases. By implementing reversible Si-O chemistry for the crystallization of covalent organic frameworks, we demonstrate the simple one-pot synthesis of silicate organic frameworks based on octahedral dianionic SiO6 building units. Clear evidence of the hexacoordinate environment around the silicon atoms is given by (29)Si nuclear magnetic resonance analysis. Characterization by high-resolution powder X-ray diffraction, density functional theory calculation and analysis of the pair-distribution function showed that those anionic frameworks-M2[Si(C16H10O4)1...
October 2017: Nature Chemistry
Elisabetta Brenna, Michele Crotti, Francesco G Gatti, Daniela Monti, Fabio Parmeggiani, Andrea Pugliese
The use of pheromones in the integrated pest management of insects is currently considered a sustainable and environmentally benign alternative to hazardous insecticides. 4-Methylheptan-3-ol is an interesting example of an insect pheromone, because its stereoisomers are active towards different species. All four possible stereoisomers of this compound were prepared from 4-methylhept-4-en-3-one by a one-pot procedure in which the two stereogenic centres were created during two sequential reductions catalysed by an ene-reductase (ER) and an alcohol dehydrogenase (ADH), respectively...
September 22, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Wei Yang, Hua Yang, Su-Yuan Zeng, Da-Cheng Li, Jian-Min Dou
Herein, a new family of Ln(III)[18-metallacrown-6] compounds with the formula [Fe6O2Ln(tBu-sao)6(OH)(MeO)4(MeOH)(H2O)]·6MeOH [Ln = Dy(III) (1), Tb(III) (2), Gd(III) (3), and Y(III) (4), tBu-saoH2 = 3,5-di-tert-butylsalicylaldoxime] was synthesized through one-pot reactions using tBu-saoH2, Fe(ClO4)3·6H2O, and Ln(NO3)3·6H2O. The four compounds are isostructural, and the encapsulation of a Ln ion in the ring cavity of 18-metallacrown-6 (18-MC-6) was exhibited for the first time. The structural analysis shows a ship-like 18-MC-6 core with a beset lanthanide ion connecting six ring oxygen atoms (OMC)...
September 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
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