Journal ArticleDOI
Photoresponsive Tweezers for Alkali Metal Ions. Photochromic Diarylethenes Having Two Crown Ether Moieties
TLDR
In this paper, photochromic dithienylethene having two benzo-12-crown-4 ethers and bis(benzothienyl)ethene with two crown ether moieties of the open ring form captured large metal ions cooperatively like tweezers, while the photogenerated closed-ring form released the ions.Abstract:
Alkali metal ion extraction was carried out using photochromic dithienylethene having two benzo-12-crown-4 ethers (1), benzo-15-crown-5 ethers (2), or benzo-18-crown-6 ethers moieties (3) and bis(benzothienyl)ethene having two benzo-18-crown-6 ether moieties (4) Two crown ether moieties of the open-ring form captured large metal ions cooperatively like tweezers, while the photogenerated closed-ring form released the ions The reduced affinities for metal picrates were fully recovered by irradiation with visible light (>480 nm) The 1H NMR spectrum measurement of the solutions (CDCl3/CD3CN: 5/1) containing both alkali metal picrates and 2 or 3 confirmed that the large alkali metal ions were captured by the two intramolecular crown ethersread more
Citations
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Artificial Molecular Machines.
TL;DR: The aim of this review is to present a unified view of the field of molecular machines by focusing on past achievements, present limitations, and future perspectives.
Journal ArticleDOI
Molecular switches as photocontrollable “smart” receptors
Manuel Natali,Silvia Giordani +1 more
TL;DR: This critical review focuses on the development of photochromic compounds as sensors for cations, anions, and biologically important molecules and a summary of photoswitchable receptors emerged to date and classified according to the photo chromic structure they are based on.
Journal ArticleDOI
Künstliche molekulare Maschinen
TL;DR: In this paper, a bottom-up approach for the construction of kleiner maschines is proposed, in which the Molekulare maschine is constructed in a top-down approach.
Journal ArticleDOI
Light-driven open-close motion of chiral molecular scissors
TL;DR: The first example of "light-driven chiral molecular scissors" (1), which consists of 1,1',3,3'-tetraarylferrocene as a pivot part and azobenzenes as a driving part, was synthesized.
References
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Journal ArticleDOI
The Palladium-Catalyzed Cross-Coupling Reaction of Phenylboronic Acid with Haloarenes in the Presence of Bases
TL;DR: The transition metal-catalyzed reactions of organometallics with organic halides have been extensively studied to prove a new approach to selective formation of carbon-carbon bonds as mentioned in this paper.
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Thermally irreversible photochromic systems. Reversible photocyclization of 1,2-bis (2-methylbenzo[b]thiophen-3-yl)perfluorocyclocoalkene derivatives
TL;DR: In this article, 1,2-Bis(2-methylbenzo[b]thiophen-3-yl)perfluorocylopentenes undergo photochromic reactions in which colouration/decolouration cycles can be repeated more than 104 times without significant loss of performance.
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Thermally Irreversible Photochromic Systems. Reversible Photocyclization of 1,2-Bis(benzo[b]thiophen-3-yl)ethene Derivatives
TL;DR: The closed-ring forms were stable for more than 3 weeks at 80 °C and the coloration/decoloration cycle was repeated more than 104 times with keeping the adequate photochromic performance as mentioned in this paper.
Journal ArticleDOI
Photochromic Diarylethenes with Intralocking Arms
Journal ArticleDOI
Photochromic diarylethenes for photonic devices
TL;DR: In this article, a new type of photochromic compounds, diaryl- ethenes with heterocyclic rings, was proposed for photonic devices, which can undergo thermally irreversible and fatigue resistant photo-chromic reactions.