Gallium potential applications

M. R. Mason, R. M. Matthews, A. M. Perkins, and V. V. Ponomarova, Molecular Phosphates and Phosphonates of Aluminum and Gallium Potential Applications in Materials Synthesis, in Group 13 Chemistry From Fimdamentals to Applications , ACS Symposium Series 822, eds. P. J. Shapiro and D. A. Atwood, American Chemical Society, Washington, DC, 2002, p. 181. 

Corroles are tetrapyrrole macrocycles that are closely related to porphyrins, with one carbon atom less in the outer periphery and one NH proton more in their inner core. They may also be considered as the aromatic version (identical skeleton) of the only partially conjugated corrin, the cobalt-coordinating ligand in Vitamin B12. Two potential application of corroles are in tumor detection and their use in photovoltaic devices. Selective substitution of corroles via nitration, hydroformylation, and chlorosulfonation for the gallium were studied in detail and the respective mechanistic pathways and spectroscopic data were reported, (an example is shown in Figure 27). Overall, over 139 various corroles were synthesized and the effect of various metal complexation pertaining to their selective reactivity examined. 

A novel gallium(III) complex of the selected Schiff-base ligand (Ga-[3-ethoxy-ENBDMPI]) was synthesized and evaluated as a potential probe to assess Pgp activity. This compound is a non-metabolized cationic hydrophobic complex that can be labeled either with the single-photon emitter Ga (ti/2 = 78 h) or with the positron emitter Ga (ti/2 = 68 min) thus having potential applications in both SPECT and PET for the functional imaging of Pgp. 

D7 The base semiconducting material used in virtually all modern integrated circuits is silicon. However, silicon has some limitations and restrictions. Write an essay comparing the properties and applications (and/or potential applications) of silicon and gallium arsenide. 

Indium and gallium coordination compounds containing phosphine ligands have recently aroused interest for their widespread application as intermediates in the preparation of the Group 13 - Group 14 semiconductors [4], Since the early reports about compounds with transition metal-indium bonds [51, relatively little research has been reported in this field. However there is a growing interest in the coordination chemistry and structural features of heterometallic indium [6] and gallium complexes [7] which are also attractive as potential precursors of new materials with particular properties. 

Gallium nitride (GaN) has a hexagonal structure of wurtzite type with a wide direct bandgap of 3.4 eV at 300 K. GaN-based III—V nitrides with wide band gaps are the potential candidates for device applications in the blue and ultraviolet wavelengths... 

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