Photochromic Dihetarylethenes. Part 17. Synthesis and Photochromic Properties of Dithienylethenes Containing New Heterocyclic Bridging Fragments.

ChemInform ◽  
2003 ◽  
Vol 34 (15) ◽  
Author(s):  
M. M. Krayushkin ◽  
S. N. Ivanov ◽  
A. Yu. Martynkin ◽  
B. V. Lichitsky ◽  
A. A. Dudinov ◽  
...  
Keyword(s):  
Photochromic Properties

Yttrium Oxyhydrides for Photochromic Applications: Correlating Composition and Optical Response

2018 ◽  
Author(s):  
Dmitrii Moldarev ◽  
Elbruz M. Baba ◽  
Marcos V. Moro ◽  
Chang C. You ◽  
Smagul Zh. Karazhanov ◽  
...  
Keyword(s):  
Medical Devices ◽  
Ternary Diagram ◽  
Optical And Electrical Properties ◽  
Ambient Conditions ◽  
Elastic Recoil ◽  
Elastic Recoil Detection Analysis ◽  
Photochromic Properties ◽  
Smart Windows ◽  
Elastic Recoil Detection ◽  
Detection Analysis

It has been recently demonstrated that yttrium oxyhydride(YHO) films can exhibit reversible photochromic properties when exposed to illumination at ambient conditions. This switchable optical propertyenables their utilization in many technological applications, such as smart windows, sensors, goggles, medical devices, etc. However, how the composition of the films affects their optical properties is not fully clear and therefore demands a straightforward investigation. In this work, the composition of YHO films manufactured by reactive magnetron sputtering under different conditions is deduced in a ternary diagram from Time-of-Flight Elastic Recoil Detection Analysis (ToF-ERDA). The results suggest that stable compounds are formed with a specificchemical formula – YH<sub>2-δ</sub>O<sub>δ</sub>. In addition, optical and electrical properties of the films are investigated, and a correlation with their compositions is established. The corresponding photochromic response is found in a specific oxygen concentration range (0.45 < δ < 1.5) with maximum and minimum of magnitude on the lower and higher border, respectively.

Spectral and kinetic manifestations of chain flexibility and polarity in reversible photoisomerization of spironaphthoxazine-based acrylic copolymers

2021 ◽  
Author(s):  
Vahid Hamrang ◽  
Ali Reza Mahdavian
Keyword(s):  
Photochromic Properties ◽  
Chain Flexibility ◽  
Acrylic Copolymers

Future advances of photoresponsive materials essentially depend on our knowledge about how the substrates, and typically their Tg and polarity, affect photochromic properties. Here, these were followed in two separate...

Study of the Photochromic Properties of Amorphous MoO3 Films Using Raman Microscopy

1995 ◽  
Vol 99 (44) ◽  
pp. 16383-16388 ◽  
Author(s):  
K. Ajito ◽  
L. A. Nagahara ◽  
D. A. Tryk ◽  
K. Hashimoto ◽  
A. Fujishima
Keyword(s):  
Raman Microscopy ◽  
Photochromic Properties

Efficient Synthesis and Photochromic Properties of a New Diarylethene Bearing a Condensed Aromatics Moiety

2012 ◽  
Vol 455-456 ◽  
pp. 33-36
Author(s):  
Ren Jie Wang ◽  
Hong Ying Xia ◽  
Gang Liu ◽  
Shi Qiang Cui
Keyword(s):  
Uv Light ◽  
Optical Storage ◽  
Hybrid Structure ◽  
Order Reaction ◽  
Pmma Film ◽  
Efficient Synthesis ◽  
Photochromic Properties ◽  
First Order ◽  
New Class ◽  
Hexane Solution

A new class of diarylethenes based on a hybrid structure of thiophene and naphthalene has been developed and its properties including photochromism, kinetics and fluorescence were investigated in detail. The results showed that the compound exhibited obvious photochromism, changing from colorless to red after irradiation with 297 nm UV light both in solution and in PMMA film. The kinetic experiments indicated that the cyclization/cycloreversion process of the compound was determined to be the zeroth/first order reaction in hexane solution. At last, the results demonstrated that the diarylethene compound had attractive properties for potential application in optical storage.

scholarly journals Relation between photochromic properties and molecular structures in salicylideneaniline crystals

2012 ◽  
Vol 68 (3) ◽  
pp. 297-304 ◽  
Author(s):  
Kohei Johmoto ◽  
Takashi Ishida ◽  
Akiko Sekine ◽  
Hidehiro Uekusa ◽  
Yuji Ohashi
Keyword(s):  
Dihedral Angle ◽  
Steric Hindrance ◽  
Molecular Structures ◽  
Dihedral Angles ◽  
Clear Correlation ◽  
X Ray Diffraction ◽  
Photochromic Properties ◽  
X Ray ◽  
Benzene Rings ◽  
The Relationship

The crystal structures of the salicylideneaniline derivatives N-salicylidene-4-tert-butyl-aniline (1), N-3,5-di-tert-butyl-salicylidene-3-methoxyaniline (2), N-3,5-di-tert-butyl-salicylidene-3-bromoaniline (3), N-3,5-di-tert-butyl-salicylidene-3-chloroaniline (4), N-3,5-di-tert-butyl-salicylidene-4-bromoaniline (5), N-3,5-di-tert-butyl-salicylidene-aniline (6), N-3,5-di-tert-butyl-salicylidene-4-carboxyaniline (7) and N-salicylidene-2-chloroaniline (8) were analyzed by X-ray diffraction analysis at ambient temperature to investigate the relationship between their photochromic properties and molecular structures. A clear correlation between photochromism and the dihedral angle of the two benzene rings in the salicylideneaniline derivatives was observed. Crystals with dihedral angles less than 20° were non-photochromic, whereas those with dihedral angles greater than 30° were photochromic. Crystals with dihedral angles between 20 and 30° could be either photochromic or non-photochromic. Inhibition of the pedal motion by intra- or intermolecular steric hindrance, however, can result in non-photochromic behaviour even if the dihedral angle is larger than 30°.

Photochromic Properties of Tungsten Oxide/Methylcellulose Composite Film Containing Dispersing Agents

2015 ◽  
Vol 7 (47) ◽  
pp. 26326-26332 ◽  
Author(s):  
Suzuko Yamazaki ◽  
Hiroki Ishida ◽  
Dai Shimizu ◽  
Kenta Adachi
Keyword(s):  
Composite Film ◽  
Tungsten Oxide ◽  
Photochromic Properties ◽  
Dispersing Agents

Cellulose Acetate/N-TiO2 Biocomposite Flexible Films with Enhanced Solar Photochromic Properties

2017 ◽  
Vol 46 (7) ◽  
pp. 4567-4574 ◽  
Author(s):  
T. Radhika ◽  
K. R. Anju ◽  
M. S. Silpa ◽  
R. Jothi Ramalingam ◽  
Hamad A. Al-Lohedan
Keyword(s):  
Cellulose Acetate ◽  
Photochromic Properties ◽  
Flexible Films

Synthesis, Properties and Application in Optical Memory of a New Photochromic Diarylethene Based on a Chlorine Atom

2012 ◽  
Vol 455-456 ◽  
pp. 25-28 ◽  
Author(s):  
Zhi Peng Tong ◽  
Gang Liu ◽  
Shi Qiang Cui
Keyword(s):  
Chlorine Atom ◽  
Uv Light ◽  
Optical Memory ◽  
Optical Recording ◽  
Pmma Film ◽  
Recording Medium ◽  
Photochromic Properties ◽  
Synthesis Properties

A new unsymmetrical photochromic diarylethene 1-(2,4-dimethyl-3-isoxazol)-2-[2-methyl-5-(2-chlorophenyl) -3-thienyl] perfluorocyclopentene (1a) has been synthesized. Its photochromic properties in solution and PMMA film were investigated. Diarylethene 1a changed the color from colorless to red upon irradiation with 297 nm UV light, in which absorption maxima were observed at 515 nm in hexane and at 526 nm in PMMA film, The results demonstrated that it can be potentially used as polarization holographic optical recording medium.

Sign in / Sign up

Export Citation Format

Share Document