Synthesis and dark state EPR properties of PDI-trityl dyads and triads.

Covalently-linked chromophore-radical systems with their unique optical and magnetic properties are useful for applications in, e. g., quantum information science.

PDI-trityl dyads as photogenerated molecular spin qubit candidates.

Owing to their potential applications in the field of quantum information science, photogenerated organic triplet-radical conjugates have attracted an increasing amount of attention recently. Typically, these compounds are composed of a chromophore appended to a stable radical. After initialisation of the system by photoexcitation, a highly spin-polarised quartet state may be generated, which serves as a molecular spin qubit candidate.

Magneto-Structural Correlations in a Mixed Porphyrin(Cu )/Trityl Spin System: Magnitude, Sign, and Distribution of the Exchange Coupling Constant.

Tetrathiatriarylmethyl radicals (TAM or trityl) are receiving increasing attention in various fields of magnetic resonance such as imaging, dynamic nuclear polarization, spin labeling, and, more recently, molecular magnetism and quantum information technology. Here, a trityl radical attached via a phenyl bridge to a copper(II)tetraphenylporphyrin was synthesized, and its magnetic properties studied by multi-frequency continuous-wave electron paramagnetic resonance (EPR) spectroscopy and magnetic measurements. EPR revealed that the electron spin-spin coupling constant J between the trityl and Cu spin centers is ferromagnetic with a magnitude of -2.

Improved, Odorless Access to Benzo[1,2-d;4,5-d']- bis[1,3]dithioles and -butyl Arylsulfides via C-S Cross Coupling.

Benzo[1,2-d;4,5-d']bis[1,3]dithioles are important building blocks within a range of functional materials such as fluorescent dyes, conjugated polymers, and stable trityl radicals. Access to these is usually gained via -butyl aryl sulfides, the synthesis of which requires the use of highly malodorous -butyl thiol and relies on SAr-chemistry requiring harsh reaction conditions, while giving low yields. In the present work, S--butyl isothiouronium bromide is successfully applied as an odorless surrogate for -butyl thiol.

Heat management strategies for MSW landfills.

Heat is a primary byproduct of landfilling of municipal solid waste. Long-term elevated temperatures have been reported for MSW landfills under different operational conditions and climatic regions around the world. A conceptual framework is presented for management of the heat generated in MSW landfills.

Predictable implant placement with a diagnostic/surgical template and advanced radiographic imaging.

The technique described facilitates precise dental implant placement. A barium-coated template with external guide wires used in conjunction with a computed tomography scan and interactive software may provide superior presurgical diagnostics, treatment planning, and prosthetically directed implant placement. Measurements predetermined on the computed tomography scan can be transferred accurately to the diagnostic/surgical template by use of a precision milled cylinder placed into the template at the proper angulation and linear dimensions.