Photochromism

Dessauer, Rolf; Paris, J. P.

doi:10.1002/9780470133316.ch8

Cited by 43 publications

(2 citation statements)

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“…The earliest reference of the phenomena of photochromism can be found in account of era of the Alexander (356-323 BC), the king of Macedonia in his conquest, he employed head warriors equipped with some kind of photochromic bracelets, unknown till date exhibiting to color change when exposed to sunlight. Such color change was used by the warriors to indicate the right moment to begin the battle (Dessauer & Paris, 1963). In 1867, an account of alteration of color of a molecule and its reversibility was reported by Fritzsche (Fritzsche, 1867).The first ever reported detail scientific work on photochromic organic compound at solid state is on 2,3,4,4-tetrachloronapthalen-1-(4H)one in 1899 by Markwald (Dürr & Bouas-Laurent, 2003).…”

Section: Literature Reviewmentioning

confidence: 99%

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A Preliminary First Principle Study on Photochromism of Diarylethene Molecules

Karki

2019

Prithvi J. Res. Innov.

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Photochromism in some diarylethene molecules have been studied by using hybrid density functional theory using the ground state energy consideration. In particular, B3LYP functional and all electron basis set 6-311G (2d,2p) as implemented in Gaussian09 suites of program has been used to investigate the energy difference of two stable isomers of stilbene, azobenzene, cyclooctane, and 1,2, dimethylcyclohexane molecules. The energy difference is corroborated to calculate the frequencies of photons that are required to induce photochromism in these molecules in vacuum and in solvation state. The study found that the molecules exhibit photochromism at various frequency range from infra-red to ultraviolet. The binding energy per atom, charge distribution, HOMO-LUMO (Highest Occupied Molecular Orbital and Lowest Unoccupied Molecular Orbital) gap are also calculated for all the molecules in vacuum, water and ethanol solvent. The results obtained are in accordance with the experimental observations.

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Section: Literature Reviewmentioning

confidence: 99%

“…The word "photochromism" had become quite usual during 1950s and 1960s. Many new molecules were synthesized and studied during this period (Nakatani, Piard, Yu, & Métivier, 2016;Dessauer & Paris, 1963;Brown & Shaw, 1961;Cohen & Newman, 1967).…”

Section: Literature Reviewmentioning

confidence: 99%