With a view to developing a theranostic nanomedicine for targeted drug delivery systems visible by magnetic resonance (MR) imaging, robust metal‐free magnetic nanoemulsions (mean particle size less than 20 nm) consisting of a biocompatible surfactant and hydrophobic, low molecular weight 2,2,5‐trimethyl‐5‐(4‐alkoxy)phenylpyrrolidine‐N‐oxyl radicals were prepared in pH 7.4 phosphate‐buffered saline
Two series of heteroleptic cyclometalated platinum(II) complexes [(CnOppy)Pt(acac) and (CnOFppy)Pt(acac)] have been prepared. Their liquid-crystal and optophysical properties were studied, in which CnOppy is 2-(4-alkoxyphenyl)-5-(alkoxymethyl)pyridine and CnOFppy is 2-(3-fluoro-4-alkoxyphenyl)-5-(alkoxymethyl)pyridine. Only the heteroleptic cyclometalated platinum(II) complexes (n = 12 and 16) exhibited enantiotropic mesophase transitions with smectic (Sm) structure. Intense polarized luminescence with a maximum peak at 532 nm and a polarization ratio as high as 10.5 were obtained in an aligned polyimide film under opto-excitation at room temperature. This research work provides a simple approach to realize high-efficiency polarized emission by heteroleptic cyclometalated platinum(II) complexes.
Assemblies comprising anion complexes of Ï-extended oligopyrrole derivatives and counter cations, as well as those of anion-free receptor molecules, exhibited the formation of mesophases based on columnar structures using electrostatic and ÏâÏ interactions.
Impact of alkoxy chain length on carbazole-based, visible light-driven, dye sensitized photocatalytic hydrogen production
作者:Motonori Watanabe、Hidehisa Hagiwara、Yudai Ogata、Aleksandar Staykov、Sean R. Bishop、Nicola H. Perry、Yuan Jay Chang、Shintaro Ida、Keiji Tanaka、Tatsumi Ishihara
DOI:10.1039/c5ta04991a
日期:——
Alkoxyphenyl-substituted carbazole-based metal-free organic dyes were synthesized and effectively used for dye-sensitized, visible-light-driven, photocatalytic hydrogen production.
烷氧基苯基取代的咔唑基金属无机染料被合成,并有效地用于染料敏化的、可见光驱动的光催化制氢。
Multi-Input/Multi-Output Molecular Response System Based on the Dynamic Redox Behavior of 3,3,4,4-Tetraaryldihydro[5]helicene Derivatives: Reversible Formation/Destruction of Chiral Fluorophore and Modulation of Chiroptical Properties by Solvent Polarity
3,3,4,4‐Tetaaryldihydro[5]helicenes (1) and 1,1′‐binaphthyl‐2,2′‐diylbis(diarylcarbenium)s (22+) can be reversibly interconverted upon electron transfer, which is accompanied by a vivid color change (electrochromism) as well as by the formation/cleavage of a CC bond (“dynamicredoxbehavior”). Because only the neutral donor 1 exhibits strong fluorescence, electrochemical input can further modify the