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The kinetics of the reactions of various primary and secondary amines with the benzhydrylium ions in water are investigated, demonstrating their nucleophilcites. The results show a poor correlation between the nucleophilicities values, as the secondary alkyl amines and anilines are more nucleophilicdue to the difference in their pH values.

A novel InGaP/InGaAs/GaAs p-channel pseudomorphic modulation-doped field effect transistor based on p[SUP+]-GaAs/n[SUP+]-InGaP/p-InGaP camel-like gate structure is reported for the first time. Owing to the p-n depletion of the camel-like gate and the presence of relatively large ΔEv at InGaP/InGaAs heterostructure, an extremely large gate turn-on voltage, greater than 2 V, is measured. For a 1×100 μm[SUP2] device, the experimental results show a maximum saturation current density of -345 mA/mm and a widely broad gate voltage swing, greater than 4 V, with 80% maximum transconductance. Furthermore, the f[SUBT] and f[SUBmax] values are 3.1 and 4.8 GHz, respectively. [ABSTRACT FROM AUTHOR]