Articles written in Journal of Chemical Sciences

    • Multidimensional potential of boron-containing molecules in functional materials

      Wolfgang Kaim Narayan S Hosmane

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      Boron-containing molecular systems have received much attention under theoretical aspects and from the side of synthetic organic chemistry. However, their potential for further applications such as optically interesting effects such as Non-Linear Optics (NLO), medical uses for Boron Neutron Capture Therapy (BNCT), or magnetism has been recognised only fairly recently. Molecular systems containing boron offer particular mechanisms to accommodate unpaired electrons which may result in stable radicals as spin-bearing materials. Among such materials are organoboron compounds in which the prototypical electron deficient (10B, 11B) boron vs. carbon centers can accept and help to delocalise added electrons in a 2-dimensionally conjugated 𝜋 system. Alternatively, oligoboron clusters B$_n$X$_n^k$ and the related carboranes or metallacarboranes are capable of adding or losing single electrons to form paramagnetic clusters with 3-dimensionally delocalised spin, according to combined experimental studies and quantum chemical calculations. The unique nuclear properties of 10B are of therapeutic value if their selective transport via appended carbon nanotubes, boron nanotubes, or magnetic nanoparticles can be effected.

    • Materials with electronic transitions in the near-infrared


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      Concepts have been developed which favor low-energy absorption in the near-infrared (NIR) region. These include metal-metal charge transfer (inter-valence charge transfer) transitions of mixed-valent species, radical ion compounds (anions, cations), and mixtures thereof. Recent examples from ruthenium coordination chemistry are presented in order to illustrate analysis and assignment of such NIR transitions

  • Journal of Chemical Sciences | News

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