Pale Yellow-to-Dark Blue Electrochromic Film Produced by Oxidation Electropolymerization of a Triphenylamine Derivative with an Enhanced Electron-Withdrawing Group

2021 ◽  
pp. 110684
Author(s):  
Qiaozhen Pi ◽  
Lijun Li ◽  
Dongfang Qiu ◽  
Hongwei Wang ◽  
Xinfeng Cheng ◽  
...  
Keyword(s):  
Pale Yellow ◽  
Electron Withdrawing Group ◽  
Triphenylamine Derivative ◽  
Dark Blue

Article

1999 ◽  
Vol 77 (5-6) ◽  
pp. 738-743 ◽  
Author(s):  
H S Lee ◽  
X Q Yang ◽  
J McBreen ◽  
D Vyprachticky ◽  
Y Okamoto
Keyword(s):  
Benzene Solution ◽  
Nile Blue ◽  
Neutral Red ◽  
Ion Binding ◽  
Dye Molecules ◽  
Anion Receptor ◽  
Binding Properties ◽  
Nonpolar Solvents ◽  
Electron Withdrawing Group ◽  
Dark Blue

A new chloride anion receptor, derivatized oligoethylene oxide CF3SO2 substituted tetraamine (3), was synthesized. This compound exhibited strong Cl-1 ion binding properties in nonpolar solvents such as benzene. Neutral red and Nile blue chloride dye molecules do not dissolve in benzene. However, when compound (3) was added to a benzene solution containing the solid dye compounds, the color of the solution immediately turned to dark blue, and the intensity of the color proportionally increased with the concentration of (3). The phenomena indicated that the Cl- ions of Neutral red or Nile blue chloride are complexed with (3), thereby resulting in an increase in the solubility of the Neutral red or Nile blue cations in benzene. The dissociation of chloride anions from 4,4',4''-trimethoxytriphenyl chloromethane in a benzene solution proceeded with addition of compound (3) and increased with increasing time at room temperature. In contrast, another tetraamine compound (4) which was substituted with a less electron withdrawing group, CH3SO2, did not complex with Cl- anions in a benzene solution.Key words: Cl- anion receptor, trifluoromethyl sulfonated tetraamine, ion pair dissociation.

Dark Blue Beryl from Pakistan

2019 ◽  
Vol 36 (7) ◽  
pp. 583-584
Author(s):  
Brendan M. Laurs ◽  
George R. Rossman
Keyword(s):  
Dark Blue

A New Species of Turnera (Turneraceae, Passifloraceae s. l.) from the Brazilian Cerrado

2020 ◽  
Vol 45 (4) ◽  
pp. 826-832
Author(s):  
Lamarck Rocha ◽  
Maria Mercedes Arbo
Keyword(s):  
New Species ◽  
Brazilian Cerrado ◽  
Distribution Map ◽  
Sem Images ◽  
Dark Blue ◽  
A New Species

Abstract—Turnera macrosperma, a new species from the Brazilian Cerrado, is described and illustrated. The new species belongs to the series Turnera and can be characterized by the white petals with dark blue/violet basal spot and large seeds with papillose aril. SEM images, distribution map, and comments on taxonomy and morphology are presented.

Sunlight exposure: the effects on the performance of paragliding fabric

2018 ◽  
Vol 69 (05) ◽  
pp. 381-389
Author(s):  
MENGÜÇ GAMZE SÜPÜREN ◽  
TEMEL EMRAH ◽  
BOZDOĞAN FARUK
Keyword(s):  
Mechanical Properties ◽  
Aging Process ◽  
Air Permeability ◽  
Sunlight Exposure ◽  
Test Results ◽  
Coating Materials ◽  
Strength Tests ◽  
Before And After ◽  
The Relationship ◽  
Dark Blue

This study was designed to explore the relationship between sunlight exposure and the mechanical properties of paragliding fabrics which have different colors, densities, yarn counts, and coating materials. This study exposed 5 different colors of paragliding fabrics (red, turquoise, dark blue, orange, and white) to intense sunlight for 150 hours during the summer from 9:00 a.m. to 3:00 p.m. for 5 days a week for 5 weeks. Before and after the UV radiation aging process, the air permeability, tensile strength, tear strength, and bursting strength tests were performed. Test results were also evaluated using statistical methods. According to the results, the fading of the turquoise fabric was found to be the highest among the studied fabrics. It was determined that there is a significant decrease in the mechanical properties of the fabrics after sunlight exposure. After aging, the fabrics become considerably weaker in the case of mechanical properties due to the degradation in both the dyestuff and macromolecular structure of the fiber

scholarly journals Sustainable roll-to-roll manufactured multi-layer smart label

2021 ◽  
Author(s):  
Liisa Hakola ◽  
Elina Jansson ◽  
Romain Futsch ◽  
Tuomas Happonen ◽  
Victor Thenot ◽  
...  
Keyword(s):  
Electronic Waste ◽  
Near Field ◽  
Colour Change ◽  
Pilot Scale ◽  
Printed Antennas ◽  
Free Paper ◽  
Roll To Roll ◽  
Final Yield ◽  
Smart Label ◽  
Dark Blue

AbstractSustainability in electronics has a growing importance due to, e.g. increasing electronic waste, and global and European sustainability goals. Printing technologies and use of paper as a substrate enable manufacturing of sustainable electronic devices for emerging applications, such as the multi-layer anti-counterfeit label presented in this paper. This device consisted of electrochromic display (ECD) element, NFC (near field communication) tag and circuitry, all fully roll-to-roll (R2R) printed and assembled on plastic-free paper substrate, thus leading to a sustainable and recyclable device. Our setup uses harvested energy from HF field of a smartphone or reader, to switch an electrochromic display after rectification to prove authenticity of a product. Our novelty is in upscaling the manufacturing process to be fully printable and R2R processable in high-throughput conditions simulating industrial environment, i.e. in pilot scale. The printing workflow consisted of 11 R2R printed layers, all done in sufficient quality and registration. The printed antennas showed sheet resistance values of 32.9±1.9 mΩ/sq. The final yield was almost 1500 fully printed devices, and in R2R assembly over 1400 labels were integrated with 96.5% yield. All the assembled tags were readable with mobile phone NFC reader. The optical contrast (ΔE*) measured for the ECDs was over 15 for all the printed displays, a progressive switching time with a colour change visible in less than 5 s. The smart tag is ITO-free, plastic-free, fully printed in R2R and has a good stability over 50 cycles and reversible colour change from light to dark blue.

scholarly journals Clinical and Forensic Aspects of the Different Subtypes of Argyria

2021 ◽  
Vol 10 (10) ◽  
pp. 2086
Author(s):  
Luís Mota ◽  
Ricardo Jorge Dinis-Oliveira
Keyword(s):  
Systemic Absorption ◽  
Histopathological Analysis ◽  
Wide Range ◽  
Silver Deposits ◽  
Specific Tissue ◽  
Eye Lesions ◽  
Dark Blue ◽  
Typical Skin ◽  
Viable Treatment

Argyria encompasses the different cosmetic alterations that can develop if enough silver particles deposit in a specific tissue, typically in the skin, ranging from localized dark-blue macules to a generalized slate-gray/bluish tinge following systemic absorption. This work aims to fully review the state of the art regarding pathophysiology, diagnosis, treatment, and relevant clinical and forensic features of argyria. Argyria has been diagnosed in a wide range of ages, both sexes and varied ethnicities, with no known individual predisposing factors. Ultraviolet radiation with subsequence increases of melanin production aggravates the discoloration due to a reduction in the silver deposits. Physical examination and silver exposure in the anamnesis can be highly suggestive of the diagnosis, but a histopathological analysis with Energy-Dispersive X-ray Spectroscopy is required to unequivocally determine the discoloration etiology. Safe and effective treatment has only been accomplished with laser techniques, though only a few cases have been reported and with limited follow-up time. In conclusion, argyria typically has an occupational or iatrogenic etiology. It should be suspected when a patient presents with typical skin or eye lesions. A seemingly viable treatment modality, with laser technology, is finally within the horizon.

Effect of core engineering on triphenylamine derivative-based dopant-free hole-transporting materials for perovskite solar cells: from theoretical calculation to experimental research

2021 ◽  
Author(s):  
Qian Chen ◽  
Puhang Chen ◽  
Hongyuan Liu ◽  
Xiaorui Liu
Keyword(s):  
Solar Cells ◽  
Theoretical Calculation ◽  
Small Molecule ◽  
Experimental Research ◽  
Perovskite Solar Cells ◽  
Free Hole ◽  
High Efficient ◽  
Hole Transporting ◽  
Hole Transporting Materials ◽  
Triphenylamine Derivative

Computational actuation on design of small-molecule triphenylamine derivative-based hole-transporting materials (HTMs) is a high-efficient way to acquire potential HTMs for perovskite solar cells (PSCs). In the work, on basis of...

scholarly journals Color Tuning by Oxide Addition in PEDOT:PSS-Based Electrochromic Devices

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 179 ◽  
Author(s):  
Delphin Levasseur ◽  
Issam Mjejri ◽  
Thomas Rolland ◽  
Aline Rougier
Keyword(s):  
Thin Films ◽  
Iron Oxide ◽  
Conducting Polymers ◽  
Applied Voltage ◽  
Oxide Content ◽  
Electrochromic Devices ◽  
Careful Evaluation ◽  
Pedot Film ◽  
Oxide Addition ◽  
Dark Blue

Poly(3,4-ethylenedi-oxythiophene) (PEDOT) derivatives conducting polymers are known for their great electrochromic (EC) properties offering a reversible blue switch under an applied voltage. Characterizations of symmetrical EC devices, built on combinations of PEDOT thin films, deposited with a bar coater from commercial inks, and separated by a lithium-based ionic membrane, show highest performance for 800 nm thickness. Tuning of the color is further achieved by mixing the PEDOT film with oxides. Taking, in particular, the example of optically inactive iron oxide Fe2O3, a dark blue to reddish switch, of which intensity depends on the oxide content, is reported. Careful evaluation of the chromaticity parameters L*, a*, and b*, with oxidizing/reducing potentials, evidences a possible monitoring of the bluish tint.

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