Topic
Electrochromism
About: Electrochromism is a research topic. Over the lifetime, 13097 publications have been published within this topic receiving 294637 citations.
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TL;DR: A diruthenium complex with a redox-active amine bridge has been designed, synthesized, and studied by single-crystal X-ray analysis and DFT and TDDFT calculations and shows three well-separated redox processes with exclusive near-infrared (NIR) absorbance at each redox state.
Abstract: A diruthenium complex with a redox-active amine bridge has been designed, synthesized, and studied by single-crystal X-ray analysis and DFT and TDDFT calculations. It shows three well-separated redox processes with exclusive near-infrared (NIR) absorbance at each redox state. The electropolymerized film of a related vinyl-functionalized complex displays multistate NIR electrochromism with low operational potential, good contrast ratio, and long retention time. Flip-flop, flip-flap-flop, and ternary memories have been realized by using the obtained film (ca. 15-20nm thick) with three electrochemical inputs and three NIR optical outputs that each displays three levels of signal intensity.
87 citations
TL;DR: The state-of-the-art for photochromic materials can be found in this article, with a focus on glass and spirooxazine compounds, particularly vanadiumoxide-based coatings and cloud gels.
Abstract: Chromogenic materials have optical properties that can be changed in a persistent and reversible manner under the action of an external stimulus. They can regulate the throughput of radiant energy between widely separated extrema, and hence they can be used in future “smart windows” in buildings, cars, etc., and for many other applications. This article summarizes the state-of-the-art for: Photochromic (light sensitive) materials, with a focus on glass and spirooxazine compounds Thennochromic (temperature sensitive) materials, particularly vanadium-oxide-based coatings and “cloud gels” Electrochromic (electric charge dependent) materials integrated in multilayer configurations, with emphasis on transition metal oxide coatings and ion intercalation into these Certain liquid-crystal-based (electrically switched) materials of the guest-host as well as the polymer dispersed and encapsulated types
87 citations
TL;DR: In this article, the implementation of the plastic battery technology to the elaboration of a flexible electrochromic device was reported, where a system constituted of WO3·H2O monohydrate tungsten oxide switching against polyaniline (PANI) conducting polymer.
87 citations
Patent•
21 Nov 2002TL;DR: In this article, two complementary polymers can be matched and incorporated into dual polymer electrochromic devices to allow control over the color, brightness, and environmental stability of a window.
Abstract: The subject invention pertains to electrochromic polymers and polymer electrochromic devices. In a specific embodiment, two complementary polymers can be matched and incorporated into dual polymer electrochromic devices. The anodically coloring polymers in accordance with the subject invention can allow control over the color, brightness, and environmental stability of an electrochromic window. In addition, high device contrast ratios, high transmittance changes, and high luminance changes can be achieved, along with half-second switching times for full color change. Also provided are electrochromic devices such as advertising signage, video monitors, stadium scoreboards, computers, announcement boards, warning systems for cell phones, warning/information systems for automobiles, greeting cards, electrochromic windows, billboards, electronic books, and electrical wiring. The subject invention also provides for the use of complementary electrochromic polymers in the manufacture of electrochromic devices. In some embodiments, the devices of the invention can be prepared using metal vapor deposition or line patterning.
87 citations
TL;DR: In this article, a dinuclear oxo-Mo(V) complex has been prepared which develops an intense absorption in the near-IR region (λ = 1340 nm; e = 23,000 M-1 cm-1) on reversible one-electron oxidation to [1]+.
Abstract: A dinuclear oxo-Mo(V) complex 1 has been prepared which develops an intense absorption in the near-IR region (λ = 1340 nm; e = 23 000 M-1 cm-1) on reversible one-electron oxidation to [1]+. This has formed the basis of a variable optical attenuator, whereby the intensity of near-IR laser light may be modulated over a range of 50 dB according to the electrical potential applied to the cell.
87 citations