نتایج جستجو برای: stenhouse
تعداد نتایج: 65 فیلتر نتایج به سال:
The possibility of incorporating functional groups into molecular photoswitches is a prerequisite for their versatility and broad-range applications. Herein, we present the first successful synthesis donor–acceptor Stenhouse adducts (DASA) chromophores featuring thiol group. latter provides unique opportunity to investigate photoswitching behavior these visible-light operating on surface metall...
Donor–acceptor Stenhouse adducts (DASAs) are visible-light-responsive photoswitches with a variety of emerging applications in photoresponsive materials. Their two-step modular synthesis, centered on the nucleophilic ring opening an activated furan, makes DASAs readily accessible. However, use less reactive donors or acceptors renders process slow and low yielding, which has limited their devel...
Donor–acceptor Stenhouse adducts (DASAs) have recently emerged as a new class of photoswitchable molecules. 2] These compounds feature a system of three conjugated C=C double bonds connecting an aliphatic amine “donor” and a 1,3-dicarbonyl “acceptor”, giving rise to an intense absorption in the visible (green) region. DASAs serve as an example of negative photochromic materials : exposing the t...
Donor-acceptor Stenhouse adducts (DASAs) are negative photochromes that hold great promise for a variety of applications. Key to optimizing their switching properties is a detailed understanding of the photoswitching mechanism, which, as yet, is absent. Here we characterize the actinic step of DASA-photoswitching and its key intermediate, which was studied using a combination of ultrafast visib...
Enzymes have been widely used in biomedical applications owing to their excellent biocatalysis functions. However, the precise control of enzymatic reactions remains a challenge vivo. Here, nanoplatform functionalized with upconversion nanoparticles (UCNPs) as core and donor-acceptor Stenhouse adduct molecular switch (MS) was designed for near-infrared (NIR)-controlled reactions. Under NIR irra...
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