Synergistic effect of the reducing ability and hydrogen bonds of tested gases: highly orientational CdS dendrite sensors

2014 ◽  
Vol 2 (4) ◽  
pp. 1032-1038 ◽  
Author(s):  
Wei Guo ◽  
Jianmin Ma ◽  
Guangsheng Pang ◽  
Caiying Wei ◽  
Wenjun Zheng
Keyword(s):  
Hydrogen Bonds ◽  
Synergistic Effect ◽  
Reducing Ability

A recyclable hydroxyl functionalized polyindole hydrogel for sodium hydroxide extraction via the synergistic effect of cation–π interactions and hydrogen bonding

2018 ◽  
Vol 54 (70) ◽  
pp. 9785-9788 ◽  
Author(s):  
Guanjun Chang ◽  
Yan Wang ◽  
Cheng Wang ◽  
Yannan Li ◽  
Yewei Xu ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Synergistic Effect ◽  
Sodium Hydroxide ◽  
Π Interactions ◽  
Extraction Behavior ◽  
Highly Effective ◽  
New Type

We have successfully constructed a new type of recyclable indole-based hydrogel, which exhibited highly effective extraction behavior for hydroxide via the synergistic effect of cation–π interactions and hydrogen bonds.

scholarly journals Solvation of apolar compounds in protic ionic liquids: the non-synergistic effect of electrostatic interactions and hydrogen bonds

2017 ◽  
Vol 19 (37) ◽  
pp. 25352-25359 ◽  
Author(s):  
I. A. Sedov ◽  
T. I. Magsumov ◽  
T. M. Salikov ◽  
B. N. Solomonov
Keyword(s):  
Ionic Liquids ◽  
Hydrogen Bonds ◽  
Synergistic Effect ◽  
Electrostatic Interactions ◽  
Protic Ionic Liquids ◽  
Better Than

Protic ionic liquids can dissolve apolar compounds better than aprotic ionic liquids.

Synthesis, properties, and OLED characteristics of 2,2′-bipyridine-based electron-transport materials: the synergistic effect of molecular shape anisotropy and a weak hydrogen-bonding network on molecular orientation

2016 ◽  
Vol 4 (17) ◽  
pp. 3699-3704 ◽  
Author(s):  
Yuichiro Watanabe ◽  
Hisahiro Sasabe ◽  
Daisuke Yokoyama ◽  
Teruo Beppu ◽  
Hiroshi Katagiri ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Electron Transport ◽  
Hydrogen Bonds ◽  
Synergistic Effect ◽  
Molecular Orientation ◽  
Molecular Shape ◽  
Shape Anisotropy ◽  
Intermolecular Hydrogen Bonds ◽  
Synthesis Properties ◽  
Hydrogen Bonding Network

We investigated the synergistic effect of molecular shape anisotropy and intermolecular hydrogen-bonds in the BPy derivatives on molecular orientation towards OLEDs.

Improving the Intrinsic Thermal Conductivity of Epoxy Resin by Synergistic Effect between Rigid Groups and Hydrogen Bonds

2021 ◽  
Vol 6 (32) ◽  
pp. 8219-8226
Author(s):  
Xiaosong Shen ◽  
Yueyang Gao ◽  
Yue Sun ◽  
Di Bao ◽  
Fei Xu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Hydrogen Bonds ◽  
Synergistic Effect ◽  
Epoxy Resin ◽  
Intrinsic Thermal Conductivity

scholarly journals Synergistic Effect of Maleated Natural Rubber and Modified Palm Stearin as Dual Compatibilizers in Composites based on Natural Rubber and Halloysite Nanotubes

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 766 ◽  
Author(s):  
Nabil Hayeemasae ◽  
Zareedan Sensem ◽  
Indra Surya ◽  
Kannika Sahakaro ◽  
Hanafi Ismail
Keyword(s):  
Tensile Strength ◽  
Hydrogen Bonds ◽  
Synergistic Effect ◽  
Natural Rubber ◽  
Palm Stearin ◽  
Halloysite Nanotubes ◽  
Rubber Matrix ◽  
Rubber Composite ◽  
Dynamical Properties ◽  
Maleated Natural Rubber

The performance of rubber composite relies on the compatibility between rubber and filler. This is specifically of concern when preparing composites with very different polarities of the rubber matrix and the filler. However, a suitable compatibilizer can mediate the interactions. In this study, composites of natural rubber (NR) with halloysite nanotubes (HNT) were prepared with maleated natural rubber (MNR) and modified palm stearin (MPS) as dual compatibilizers. The MPS dose ranged within 0.5–1.5 phr, while the MNR dose was fixed at 10 phr in all formulations. It was found that the mixed MNR/MPS significantly enhanced modulus, tensile strength, and tear strength of the composites. The improvements were mainly due to improved rubber-HNT interactions arising from hydrogen bonds formed in the presence of these two compatibilizers. This was clearly verified by observing the Payne effect. Apart from that, the MPS also acted as a plasticizer to provide improved dispersion of HNT. It was clearly demonstrated that MNR and MPS as dual compatibilizers improved rubber-HNT interactions and reduced filler-filler interactions, which then improved tensile and tear strengths, as well as dynamical properties. Therefore, the mix of MNR and MPS had a great potential to compatibilize non-polar rubber with HNT filler.

A distorted lactam unit with intramolecular hydrogen bonds as the electron donor of polymer solar cells

2019 ◽  
Vol 7 (39) ◽  
pp. 12290-12296
Author(s):  
Hua-Chun Wang ◽  
Minrun Ren ◽  
Jian Cao ◽  
Hong-Bo Yin ◽  
Guichuan Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Hydrogen Bonds ◽  
Synergistic Effect ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Electron Donor ◽  
Polymer Solar Cells ◽  
Power Conversion ◽  
Side Chain ◽  
Intramolecular Hydrogen

The device based on PBDT-BTP-OD with IT-M exhibited power conversion efficiency of up to 9.54% thanks to the synergistic effect of the distorted lactam motif and side-chain engineering.

scholarly journals Performance of Additives Concerning Synergistic Effect in Lube Oil

2020 ◽  
Vol 9 (3) ◽  
pp. 1874-1878 ◽  
Keyword(s):  
Synergistic Effect ◽  
Wear Scar ◽  
Load Carrying Capacity ◽  
Extreme Pressure ◽  
Wear Properties ◽  
Wear Scar Diameter ◽  
Lubricating Oils ◽  
Effect Of Additives ◽  
Reducing Ability ◽  
Load Carrying

Lubricating oils containing ester, gaining more importance due to their friction reducing ability. Screening the performance of lubricating oils prior to field test is of most significance for the new lubricant formulations. In this endeavor, six lubricating blends were formulated having variable concentration of additives (sulfur and ester) in mineral oil and screened for their performance using four-ball tribo-tester. The formulated blends were evaluated for their extreme pressure and anti-wear characteristics as per ASTM standards. Tests were conducted on DUCOM TR- 30L four-ball tester and wear scar diameter were measured on an optical microscope.Compatibility and synergy of additives have been discussed on the basis of various parameters such as anti-wear scar diameter, mean scar diameter (just below weld load), mean scar diameter (at last non-seizure load), weld load and load wear index. The findings of this study demonstrate that ester along-with sulfur not only boost anti-wear properties but also enhance load carrying capacity of oil. An addition of sulfur beyond 2 % may not yield any significant improvement of tribo-characteristics of these oils.This paper is highlighting the synergistic effect of additives to render it as suitable lubricant for metal working applications. This paper also suggested an optimum concentration of an additive for its suitability for anti-wear and/(or) extreme-pressure properties.

scholarly journals THE ACTIVITY OF INTERMOLECULAR HYDROGEN COMPLEXES OF QUERCETIN WITH GLUCOSE IN REAC-TIONS WITH COTTON OIL PEROXY RADICALS

2020 ◽  
pp. 57-65
Author(s):  
Natal'ya Ivanovna Belaya ◽  
Aleksandr Vladimirovich Belyy ◽  
Galina Anatol'yevna Tikhonova ◽  
Yaroslav Sergeyevich Udalov
Keyword(s):  
Synergistic Effect ◽  
Ionization Potential ◽  
Quantitative Measure ◽  
Dft Method ◽  
Peroxyl Radicals ◽  
Peroxy Radicals ◽  
Reducing Ability ◽  
Effective Antioxidant ◽  
Reac Tions ◽  
Cotton Oil

The presence of a strong synergistic effect of the binary quercetin–glucose composition in the reaction with peroxyl radicals generated during the auto- and initiated oxidation of cottonseed oil was established. The highest antiradical activity showed the synergistic compositions at a ratio of 60 : 40%. The established synergism refers to the type when products, formed during reaction, interacts with peroxy radicals more effectively than the original individual substances. Such products may be intermolecular hydrogen-bonded complexes of quercetin and glucose, the existence of such complexes confirmed by NMR spectroscopy. DFT method showed that the most stable is the donor H-complex, where quercetin acts as a hydrogen donor. A quantitative measure of the electron-donating properties of H complexes – the ionization potential – was calculated in the gas phase. The ionization potential of the donor complex is lower so its reducing ability in reaction with radicals is higher than that of the monomeric antioxidant.This can explain the presence of the maximum synergistic effect in the quercetin-glucose mixture at the ratio of 60 : 40%, when, probably, the proportion of donor H-complexes in the reaction mixture is maximum. Obtained results make it possible to carry out a targeted search for effective antioxidant synergistic flavonoid–carbohydrate compositions in plant extracts.

scholarly journals Development and evaluation of polyherbal formulation for memory enhancement: study on its antioxidant properties and synergistic effects

Food Research ◽  
2019 ◽  
Vol 4 (2) ◽  
pp. 431-440
Author(s):  
N.A. Zainol Abidin ◽  
Faridah Kormin ◽  
N.A.F. Mohamed Anuar ◽  
N.A. Zainol Abidin
Keyword(s):  
Synergistic Effect ◽  
Antioxidant Activities ◽  
Synergistic Effects ◽  
Antioxidant Properties ◽  
Morinda Citrifolia ◽  
Total Phenolic ◽  
Memory Enhancement ◽  
Polyherbal Formulation ◽  
Reducing Ability ◽  
Significant Difference

Centella asiatica, Piper sarmentosum and Morinda citrifolia is well-known for their memory enhancement contribution from traditional practices as well as recent researches. However, all three herbs are utilized individually and never mixed together. The nutrient data on the synergistic effect on all three herbs remain scarce. The aims of this research project were to apply Simplex-centroid mixture design in describing the study for the effect of polyherbal formulation on antioxidants properties and its synergistic effects. Based on results obtained, there was a significant difference in antioxidant properties of the polyherbal formulation. The results show the polyherbal formulation 3 and 13 (M. citrifolia only) has the highest antioxidant capacity when being tested with total phenolic content (TPC) (210.10 and 209.12 µg GAE/mL respectively) and 2,2-diphenyl-1- picrylhydrazyl (DPPH) (42.94 and 37.77%) assays. Contradict to this result, the highest in total flavonoid content (TFC) and 2,2-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid (ABTS) for describing antioxidant properties are formulations 1 and 11 (C. asiatica only). The TPC for formulation 1 and 11 are 479.8 µg RE/mL and 470 µg RE/mL respectively while ABTS radical inhibition for formulation 1 and 11 are 64.53% and 60% respectively. For ferric reducing ability of plasma (FRAP) assay, formulation 7 (2.11 µg FSE/mL) is the highest which have 1:1:1 ratio of each herb. In addition, TPC, TFC, and DPPH assays showed high antioxidant activities when only single herbs were added into the formulation. Meanwhile, ABTS and FRAP are prone to binary polyherbal formulation. Hence, this study showed an antagonism effect instead of synergistic effect since single formulation exhibited the highest for TPC, TFC and DPPH. All tests gave the lowest antioxidant properties when the mix was ternary polyherbal formulation.

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