Reversible photochromic properties of Ti2O3(H2O)2(C2O4)·H2O material

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.

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

New Journal of Chemistry ◽

10.1039/d0nj06275h ◽

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...

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

The Journal of Physical Chemistry ◽

10.1021/j100044a028 ◽

1995 ◽

Vol 99 (44) ◽

pp. 16383-16388 ◽

Cited By ~ 88

Author(s):

K. Ajito ◽

L. A. Nagahara ◽

D. A. Tryk ◽

K. Hashimoto ◽

A. Fujishima

Keyword(s):

Raman Microscopy ◽

Photochromic Properties

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

ChemInform ◽

10.1002/chin.200315181 ◽

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

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Synthesis and photochromic properties of dithienylethenes axially coordinating with Mn(II)-porphyrins

Journal of Photochemistry and Photobiology A Chemistry ◽

10.1016/j.jphotochem.2016.08.020 ◽

2018 ◽

Vol 356 ◽

pp. 661-664 ◽

Cited By ~ 1

Author(s):

Chuanming Yu ◽

Bingcheng Hu ◽

Cheng Liu ◽

Jiting Li

Keyword(s):

Photochromic Properties

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Photochromic properties of cationic merocyanine dyes. Thermal stability of the spiropyran form produced by irradiation with visible light

Journal of Materials Chemistry ◽

10.1039/a905098a ◽

1999 ◽

Vol 9 (12) ◽

pp. 2991-2997 ◽

Cited By ~ 26

Author(s):

Shigeyuki Yagi ◽

Katsumi Maeda ◽

Hiroyuki Nakazumi

Keyword(s):

Thermal Stability ◽

Visible Light ◽

Photochromic Properties ◽

Merocyanine Dyes ◽

Thermal Stability Of

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.455-456.33 ◽

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.

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Relation between photochromic properties and molecular structures in salicylideneaniline crystals

Acta Crystallographica Section B Structural Science ◽

10.1107/s0108768112010993 ◽

2012 ◽

Vol 68 (3) ◽

pp. 297-304 ◽

Cited By ~ 32

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°.

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