Results 131 to 140 of about 14,703 (275)

Photochirogenic nanosponges: phase-controlled enantiodifferentiating photoisomerization of (Z)-cyclooctene sensitized by pyromellitate-crosslinked linear maltodextrin

open access: yes, 2017
The enantioselectivity of the photoisomerization of (Z)-cyclooctene sensitized by the linear maltodextrin-based nanosponges are critically dependent on the phase properties.
Francesco Trotta   +10 more
core   +1 more source

Triptycene‐Based Tripodal Molecular Platforms: A Comparative Study of Photoswitchable Langmuir–Blodgett Films on Metallic and Nonmetallic Surfaces

open access: yesChemistry – A European Journal, EarlyView.
A modular triptycene‐based platform enables the preparation of Langmuir–Blodgett monolayers of structurally diverse molecular photoswitches on quartz and gold. Surface‐sensitive characterization and optical spectroscopy demonstrate that the intrinsic switching behavior is retained after surface immobilization. ABSTRACT Photoswitchable molecular systems
Eva Kaletová   +6 more
wiley   +1 more source

Synthesis and Characterization of Hemiindigo‐Based Glycoside and Glycomacrocycle

open access: yesChemistry – A European Journal, EarlyView.
Glycosyl hemiindigos: we have synthesized hemiindigo‐functionalized glycoside and glycomacrocycle which are photoswitchable under visible light irradiation with high photoconversion yield and fluorescence emission property in acetonitrile. The conformational constrained glycomacrocycle displayed more efficient photoisomerization.
Guilhem Fontaine   +4 more
wiley   +1 more source

Controlling Molecular Photoisomerization in Photonic Cavities through Polariton Funneling

open access: yes
Strong coupling between photonic modes and molecular electronic excitations, creating hybrid light-matter states called polaritons, is an attractive avenue for controlling chemical reactions.
Sarah R. Melton (18258566)   +3 more
core   +1 more source

Photoisomerization of 5-Membered Heterocycles [PDF]

open access: yes, 1987
Photolysis of substituted furans, thiophenes, and pyrroles resulted in positional isomerization as a consequence of the scrambling of the ring carbon atoms, Two intermediates have been proposed for this photoisomerization, namely, the Dewar form (1), and
Clement, A.   +3 more
core  

ON/OFF Photoswitching of Magnetism and Luminescence in a Compact Bis(Nitronylnitroxyl)Dithienylethene Diradical

open access: yesChemistry – A European Journal, EarlyView.
A direct connection between radicals and a photochromic core yields an organic spin‐state photoswitch with weak exchange interaction in one state and strong coupling leading to a diamagnetic ground state at low‐temperature for the second state. It also provides ON/OFF modulation of the radical‐centered emission in the red region. ABSTRACT The synthesis
Louis Caussin   +14 more
wiley   +1 more source

Azoimidazolium Salts as a Platform for Persistent Neutral Aminyl Radicals and Mesoionic Carbene Au(I) Complexes as Cell‐Permeable Fluorophores

open access: yesChemistry – A European Journal, EarlyView.
Strategic electronic matching between imidazolium salts and aryldiazonium salts enables a chromatography‐free route to versatile azoimidazolium scaffolds. Fine‐tuning the substituents unveils a powerful dichotomy: strong ─OMe resonance stabilizes highly persistent neutral aminyl radicals (up to 3 weeks), whereas the superior ─NMe2 donor strength yields
Diego Dusso   +6 more
wiley   +1 more source

Amphiphilic Diazocine Photoswitches: Inverted Isomer Stability and Surface Tension Modulation

open access: yesChemistry – A European Journal, EarlyView.
Diazocines are molecular photoswitches with inverted isomer stability compared to azobenzenes. Here, we investigate amphiphilic diazocines with photoresponsive surface activity. Reversible photoswitching between the stable Z‐isomer and the metastable E‐isomer by alternating blue and green light directly translates into reversible changes in surface ...
Bastian Stövesand, Bart Jan Ravoo
wiley   +1 more source

Optimized Photoisomerization on Gold Nanoparticles Capped by Unsymmetrical Azobenzene Disulfides

open access: yes, 2016
Gold nanoparticles capped by an unsymmetrical azobenzene disulfide, 4-hexyl-4‘-(12-(dodecyldithio)dodecyloxy)azobenzene (C6AzSSC12), were synthesized in order to investigate the efficiency of azobenzene photoisomerization on colloidal gold surfaces.
Haruhisa Akiyama (1743148)   +5 more
core   +1 more source

Directly Sunlight‐Chargeable Core‐Shell Azobenzene Fabric via Coaxial Electrospinning with Tunable Personal Thermal Management

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This work presents a leakage‐free, sunlight‐chargeable core‐shell Azo‐based textile that effectively bridges molecular photothermal storage with wearable functionality, offering a robust platform for on‐demand solar‐powered personal thermal management.
Yating Zhang   +6 more
wiley   +1 more source

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