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Showing 1–9 of 9 results
Advanced filters: Author: Angiolina Comotti Clear advanced filters

  • Detection of gas radionuclides is limited in sensitivity with present methods, but may be useful in energy, security, medical and other sectors. In this work, gas-concentrating porous scintillating metal–organic frameworks are demonstrated for gas radionuclide detection.

    • Matteo Orfano
    • Jacopo Perego
    • Angelo Monguzzi
    ResearchOpen Access
    Nature Photonics
    Volume: 17, P: 672-678

  • Despite numerous potential applications, the development of light-responsive solid materials based on molecular photoswitches is impeded by the low efficiency of photoisomerization in the solid environment. Now a robust, solid porous material made from tetraphenylmethane and a photoswitchable overcrowded alkene exhibits nearly quantitative photoisomerization in the bulk and in photomodulation of gas uptake.

    • Fabio Castiglioni
    • Wojciech Danowski
    • Ben L. Feringa
    Research
    Nature Chemistry
    Volume: 12, P: 595-602

  • Rigid star-shaped azobenzene tetramers form a porous molecular crystal when the azobenzene moieties are in the trans configuration, and a non-porous amorphous material on their isomerization to the cis configuration. These two forms are reversibly interconverted in the solid state by light irradiation, thus enabling the photoswitching of optical and gas-capture properties.

    • Massimo Baroncini
    • Simone d'Agostino
    • Alberto Credi
    Research
    Nature Chemistry
    Volume: 7, P: 634-640

  • Molecular rotors have been engineered within the bicyclopentane–dicarboxylate struts of a metal–organic framework—the bicyclic unit is the rotator and the carboxylate groups serve as the stator. In a zinc-based metal–organic framework, the crossed conformation of the strut–metal nodes enables fast rotation of the bicyclic moiety, but in the corresponding zirconium metal–organic framework a change in the conformation results in much slower rotation.

    • Jacopo Perego
    • Silvia Bracco
    • Piero Sozzani
    Research
    Nature Chemistry
    Volume: 12, P: 845-851

  • It is shown that CsPbBr3 nanocrystals exhibit good radiation hardness for high γ-radiation doses, as high as 1 MGy. Electron trapping in surface defects limits scintillator applications, but is shown to be suppressed by surface fluorination treatment.

    • Matteo L. Zaffalon
    • Francesca Cova
    • Sergio Brovelli
    Research
    Nature Photonics
    Volume: 16, P: 860-868

  • The development of highly luminescent materials such as large Stokes shift fast emitters is desirable for their potential application in photonics. Here the authors engineer hetero-ligand metal-organic frameworks nanoparticles to achieve high emission yield, large Stokes shift and realize a prototypal fast scintillator.

    • J. Perego
    • Charl X. Bezuidenhout
    • A. Monguzzi
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-10

  • A strategy to endow vinyl polymers with pseudo-crystalline order has been devised that relies on host–guest cross-polymerization, through functionalization of the channels of a porous coordination polymer with divinyl moieties. Polymerization of vinyl monomers within the channels is accompanied with lateral crosslinking, which ensures the polymer chains remain highly ordered after removal of the host.

    • Gaetano Distefano
    • Hirohito Suzuki
    • Susumu Kitagawa
    Research
    Nature Chemistry
    Volume: 5, P: 335-341