A fluorescent dithiadiazolyl radical: structure and optical properties of phenanthrenyl dithiadiazolyl in solution and polymer composites

2017 ◽  
Vol 5 (11) ◽  
pp. 2794-2799 ◽  
Author(s):  
Yassine Beldjoudi ◽  
Igor Osorio-Román ◽  
Mitchell A. Nascimento ◽  
Jeremy M. Rawson
Keyword(s):  
Optical Properties ◽  
Polymer Composites ◽  
Unpaired Electron ◽  
Radical Structure

The phenanthrene-functionalised dithiadiazolyl radical 2 provides a rare example of a fluorescent radical, where the unpaired electron does not efficiently quench fluorophore emission (MeCN: ΦF = 0.11).

scholarly journals Correction: A fluorescent dithiadiazolyl radical: structure and optical properties of phenanthrenyl dithiadiazolyl in solution and polymer composites

2017 ◽  
Vol 5 (10) ◽  
pp. 2731-2731
Author(s):  
Yassine Beldjoudi ◽  
Igor Osorio-Román ◽  
Mitchell A. Nascimento ◽  
Jeremy M. Rawson
Keyword(s):  
Optical Properties ◽  
Polymer Composites ◽  
Radical Structure

Correction for ‘A fluorescent dithiadiazolyl radical: structure and optical properties of phenanthrenyl dithiadiazolyl in solution and polymer composites’ by Yassine Beldjoudi et al., J. Mater. Chem. C, 2017, DOI: 10.1039/c6tc05576a.

scholarly journals Polymer Composites with 0.98 Transparencies and Small Optical Energy Band Gap Using a Promising Green Methodology: Structural and Optical Properties

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1648
Author(s):  
Muaffaq M. Nofal ◽  
Shujahadeen B. Aziz ◽  
Jihad M. Hadi ◽  
Wrya O. Karim ◽  
Elham M. A. Dannoun ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Polymer Composites ◽  
Amorphous Phase ◽  
Absorption Edge ◽  
Complex Form ◽  
Bandgap Energy ◽  
Optical Parameters ◽  
Visible Spectroscopy ◽  
Uv Visible

In this work, a green approach was implemented to prepare polymer composites using polyvinyl alcohol polymer and the extract of black tea leaves (polyphenols) in a complex form with Co2+ ions. A range of techniques was used to characterize the Co2+ complex and polymer composite, such as Ultraviolet–visible (UV-Visible) spectroscopy, Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The optical parameters of absorption edge, refractive index (n), dielectric properties including real and imaginary parts (εr, and εi) were also investigated. The FRIR and XRD spectra were used to examine the compatibility between the PVA polymer and Co2+-polyphenol complex. The extent of interaction was evidenced from the shifts and change in the intensity of the peaks. The relatively wide amorphous phase in PVA polymer increased upon insertion of the Co2+-polyphenol complex. The amorphous character of the Co2+ complex was emphasized with the appearance of a hump in the XRD pattern. From UV-Visible spectroscopy, the optical properties, such as absorption edge, refractive index (n), (εr), (εi), and bandgap energy (Eg) of parent PVA and composite films were specified. The Eg of PVA was lowered from 5.8 to 1.82 eV upon addition of 45 mL of Co2+-polyphenol complex. The N/m* was calculated from the optical dielectric function. Ultimately, various types of electronic transitions within the polymer composites were specified using Tauc’s method. The direct bandgap (DBG) treatment of polymer composites with a developed amorphous phase is fundamental for commercialization in optoelectronic devices.

scholarly journals RECENT APPLICATIONS AND INNOVATIONS OF CELLULOSE BASED MATERIALS: A CRITICAL REVIEW

2021 ◽  
Vol 55 (1-2) ◽  
pp. 1-12
Author(s):  
TSHWAFO ELIAS MOTAUNG
Keyword(s):  
Mechanical Properties ◽  
Optical Properties ◽  
Thermal Degradation ◽  
Polymer Composites ◽  
Critical Review ◽  
Industrial Applications ◽  
Knowledge Gaps ◽  
Cellulosic Materials ◽  
Synthetic Fibers ◽  
Industrial Needs

"This review presents recent research on cellulosic materials and its latest uses, as well as scientific possibilities for more applications. Cellulose continues to display its advantages over synthetic fibers and its potential to replace fossilbased materials, which are known to harm ecosystems. Common attractive applications of cellulose include packaging, healthcare materials, electronics and printing. Most applications seem to rotate around the equilibrium of hydrophilicity, its mechanical properties and optical properties. Details on industrial applications, knowledge gaps and green innovations in cellulose conductivity, as well as limitations of its thermal degradation, are thoroughly covered. Most innovations are motivated by industrial needs, because renewability and inexpensiveness are the latest additional values to most industries. All common and innovative pretreatments are well summarized in this review. Furthermore, the paper provides interesting details on cellulose polymer composites, their applications and some recommendations for further research."

scholarly journals Nonlinear optical properties of mono-functional 1,2-dihydro-1,2-methanofullerene[60]-61-carboxylic acid/polymer composites

2003 ◽  
Vol 369 (3-4) ◽  
pp. 281-286 ◽  
Author(s):  
Hendry Izaac Elim ◽  
Jianying Ouyang ◽  
Jun He ◽  
Suat Hong Goh ◽  
Sing Hai Tang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Carboxylic Acid ◽  
Polymer Composites ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties

The WS2 dependence on the elasticity and optical band gap energies of swollen PAAm composites

2020 ◽  
Vol 55 (1) ◽  
pp. 71-76
Author(s):  
Gülşen Akın Evingür ◽  
Nafia Alara Sağlam ◽  
Büşra Çimen ◽  
Bengü Özuğur Uysal ◽  
Önder Pekcan
Keyword(s):  
Optical Properties ◽  
Band Gap ◽  
Polymer Composites ◽  
Optical Band Gap ◽  
Electronic Devices ◽  
Band Gap Energy ◽  
Tungsten Disulfide ◽  
High Electron ◽  
New Generation ◽  
Doped Polymer

New generation nano-filler polymer composites have many applications including biomedical, electronic and maritime related applications because of their mechanical, electronic and optical properties. The properties of composites were investigated as a function of nano-filler content. Among these, tungsten disulfide (WS2) has the potential to be used as a component in electronic devices owing to its high electron mobility and easily tunable optical band gap energy. Tungsten disulfide (WS2)- Polyacrylamide (PAAm) composite was prepared using free radical co-polymerization and wet laboratory methods with WS2 content. Composites were characterized for mechanical and optical properties using an Elasticity Instrument and UV-vis Spectrophotometer, respectively. Elastic modulus was modeled by a statistical thermodynamics model. Tauc’s and Urbach’s Tail model for direct transition were used to model for the optical band gap. In this study, the swelling and WS2 effect on the optical band gap and elasticity of WS2 - PAAm composites were investigated. It was observed that the elasticity presented a reversed behavior of optical band gap energies with respect to WS2 content. For the applications of nano-filler doped polymer composites in flexible electronic devices, WS2 content strongly influences the mechanical and optical properties.

Liquid-Crystalline Polymer Composites with CdS Nanorods: Structure and Optical Properties

Langmuir ◽  
2011 ◽  
Vol 27 (21) ◽  
pp. 13353-13360 ◽  
Author(s):  
Alexander A. Ezhov ◽  
Georgii A. Shandryuk ◽  
Galina N. Bondarenko ◽  
Alexey S. Merekalov ◽  
Sergey S. Abramchuk ◽  
...  
Keyword(s):  
Optical Properties ◽  
Polymer Composites ◽  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Crystalline Polymer ◽  
Cds Nanorods

Polymer composites with smart optical properties

Soft Matter ◽  
2011 ◽  
Vol 7 (8) ◽  
pp. 3689 ◽  
Author(s):  
Andrea Pucci ◽  
Ranieri Bizzarri ◽  
Giacomo Ruggeri
Keyword(s):  
Optical Properties ◽  
Polymer Composites

Electro-optical properties of film polymer composites with bis-azo dyes and bis-azo metal complexes

2012 ◽  
Vol 79 (3) ◽  
pp. 490-494 ◽  
Author(s):  
N. A. Davidenko ◽  
I. I. Davidenko ◽  
I. A. Savchenko ◽  
S. L. Studzinsky
Keyword(s):  
Optical Properties ◽  
Metal Complexes ◽  
Polymer Composites ◽  
Azo Dyes ◽  
Film Polymer
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