Results 51 to 60 of about 12,987 (261)

NMR studies of the polyphotochromic behaviour of biphotochromic compounds

International Journal of Photoenergy, 2004
NMR spectroscopy has been used to investigate the photochromism of four biphotochromic molecules in both the spirooxazine and naphthopyran families. The thermal evolution of photoproducts and their structural identification made it possible to observe ...
J. Berthet, S. Delbaere, V. Lokshin, A. Samat, J. C. Micheau, G. Vermeersch   +5 more
doaj   +1 more source

Novel photochromism of propargylallene in the solid state [PDF]

, 2003
2-[2,7-Dibromo-9-(3-oxo-3-phenyl-prop-1-ynyl)-9H-fluoren-9-yl]-3-fluoren-9-ylidene-1-phenyl-propenone (1) shows photochromism from pale yellow to green in the solid state, whereas 3-(2,7-dibromo-fluoren-9-ylidene)-2-[9-(3-oxo-3-phenyl-prop-1-ynyl)-9H ...
Janet L Scott, Tanaka Koichi, Tomomori Akihiro, 友森 章公, 田中 耕一   +4 more
core   +2 more sources

Photochromism and Persistent Luminescence in Ni-Doped ZnGa2O4 Transparent Glass-Ceramics: Toward Optical Memory Applications

Journal of Physical Chemistry C, 2021
Persistent luminescence and photochromism are two fascinating optical properties that involve charge trapping via defects and their release due to an external stimulation.
V. Castaing, Luidgi Giordano, C. Richard, D. Gourier, M. Allix, B. Viana   +5 more
semanticscholar   +1 more source

Photoswitching Conduction in Framework Materials

Advanced Functional Materials, EarlyView.
This mini‐review summarizes recent advances in state‐of‐the‐art proton and electron conduction in framework materials that can be remotely and reversibly switched on and off by light. It discusses the various photoswitching conduction mechanisms and the strategies employed to enhance photoswitched conductivity.
Helmy Pacheco Hernandez, Stefan Hecht, Wolfgang Wenzel, Lars Heinke, Mariana Kozlowska   +4 more
wiley   +1 more source

Driven Dynamics: A Probable Photodriven Frenkel-Kontorova Model

, 2002
In this study, we examine the dynamics of a one-dimensional Frenkel-Kontorova chain consisting of nanosize clusters (the ''particles'') and photochromic molecules (the ''bonds''), and being subjected to a periodic substrate potential.
B. N. J. Persson, Bambi Hu, F. Marchesoni, H. S. J. van der Zant, Jian-Yang Zhu, L. M. Floria, M. Irie, M. Porto, M. V. Paliy, M. Weiss, O. M. Braun, P. Hänggi, P. J. Martinez, R. A. Guyer, S. Watanabe, T. Strunz, T. Tsujioka, Ya. Frenkel   +17 more
core   +1 more source

A Tracer Diffusion Study of Diverse Photo‐Ionic Phenomena in Strontium Titanate

Advanced Functional Materials, EarlyView.
Two strong interfacial photo‐ionic effects are demonstrated for the model system SrTiO3 through the application of isotope exchange experiments: UV illumination is found to enhance the oxygen surface exchange coefficient by several orders of magnitude and to depress the surface space‐charge potential substantially.
David M. Schwenkel, Timon F. Kielgas, George F. Harrington, Roger A. De Souza   +3 more
wiley   +1 more source

Tuning the Circularly Polarized Reflection from Cholesteric Hydroxypropyl Cellulose Using Molecular Photoswitches

Angewandte Chemie, Volume 138, Issue 1, 2 January 2026.
Molecular photoswitches dispersed in a cholesteric hydroxypropyl cellulose mesophase enable reversible, light‐driven tuning of structural color and polarization. Enantiomer‐specific effects and light‐responsive patterning highlight the potential of dynamic, cellulose‐based photonic materials.
Fathy Hassan, Chun Lam Clement Chan, Thomas G. Parton, Zhen Wang, Qingchen Shen, Ruiting Li, Bruno Frka‐Petesic, Richard M. Parker, Silvia Vignolini   +8 more
wiley   +2 more sources

Matrix‐Emission‐Assisted Photochromism Enables Dual‐Field Color‐Changing Modulations

Advanced Physics Research
Trap‐related inorganic photochromic materials coupled with regulated luminescence have attracted extensive interest due to their great potential in optoelectronic devices, optical memory, and multiple anti‐counterfeiting applications.
Hengli Zhu, Jiaping Zhang, Panqin Wang, Shaoxing Lyu, Hengwei Lin, Jiaren Du   +5 more
doaj   +1 more source

Ring closing reaction in diarylethene captured by femtosecond electron crystallography [PDF]

, 2013
The photoinduced ring-closing reaction in diarylethene, which serves as a model system for understanding reactive crossings through conical intersections, was directly observed with atomic resolution using femtosecond electron diffraction.
Asano Y., Bertarelli C., Boggio-Pasqua M., Carole A. Morrison, Cheng Lu, Chergui M., Clark S. J., Collet E., Coppens P., Dudek R. C., Dwyer J. R., Eichberger M., Erasmus N., Ern J., Ern J., Ern J., Ernstorfer R., Fritz D. M., Gao M., Gao M., Grimme S., Hallmann J., Han T.-R. T., Hania P. R., Hania P. R., Harb M., Harb M., Hubert Jean-Ruel, Ihee H., Irie M., Irie M., Jean-Ruel H., Kobatake S., Kochman M. A., Lai Chung Liu, Meng Gao, Michal A. Kochman, Miyasaka H., Miyasaka H., Miyasaka H., Morimoto M., Okabe C., Owrutsky J. C., Perdew J. P., Poulin P. R., R. J. Dwayne Miller, Ryan R. Cooney, Schotte F., Sciaini G., Sciaini G., Shim S., Siwick B. J., Srinivasan R., Tamai N., Tani K., Techert S., Tian H., Uchida K., Vorontsov I. I.   +58 more
core   +1 more source

Optoelectronic Control of Redox Dynamics in POM Memristors for Noise‐Resilient Speech and Hardware‐Level Motion Recognition

Advanced Functional Materials, EarlyView.
Optoelectronic control of redox‐active polyoxometalate clusters in polymer matrices yields hybrid memristors with switchable volatile and non‐volatile modes, enabling reservoir‐type in‐sensor optical preprocessing and stable multilevel synapses for multimodal neuromorphic computing, including noise‐tolerant audiovisual keyword recognition and hardware ...
Xiangyu Ma, Ziyu Lv, Guohua Zhang, Zhongyue Xu, Yongbiao Zhai, Haiming Huang, Qiyan Zhang, Xiaojin Zhao, Yan Wang, Ye Zhou, Ziyu Xiong, Guanglong Ding, Wentao Xu, Su‐Ting Han   +13 more
wiley   +1 more source