The addition of methane sulfonic acid to N-(2,6-dimethylpyridin-4-yl)-N-methyl-2-isopropylaniline led to the selective protonation of the pyridine nitrogen atom, resulting in a significant deceleration of the rotation rates around both N-pyridyl and N-(i-Pr)phenyl bonds through a relayed brake mechanism.

Efficient synthesis of o-borylphenols is achieved through the Ru-catalyzed regio- and site-selective sp2C–H borylation of aryl diphenylphosphinites followed by removal of the phosphorus directing group. A successful application to aryl...

Next-generation lithography will require an extreme-ultraviolet (EUV) light source that ensures high radiation intensities at a wavelength of around 13.5 nm. The characteristics of pinch dynamics and emission in this spectral range were studied experimentally for xenon capillary Z-pinch plasma driven by different dI=dt discharge current pulses. The pinch dynamics of the capillary Z-pinch plasma were examined by employing a high-speed camera, and the spectral emission from plasma was inspected using an EUV photodiode, a mini calorimeter and spectrometers. Our results confirm that high-dI=dt discharge current has better performance in comparison with the low one in terms of plasma dynamics, EUV power output and debris generation.

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