The method of single-pulse bias field was employed to study the temperature dependence of VBL chain formation for soft domain segments, which might be a simulation of the temperature dependence of the "write in" operation of BLM. A critical temperature To2 was found. When T > Toz, hard bubbles are no longer formed. It was also found that there are two different stages for VBL formation between R.T. and To2. Their demarcation temperature is Tol. As a simulation of BLM minor loops, the hard stripe domains corresponding to ordinary hard bubbles were selected to study the temperature stability of VBL chains. A critical temperature To for the break down of VBL chains was found (for the same sample, To > Toz > To'). When the testing temperature T < To, the VBL chains are not changed after temperature increasing and then decreasing. When T > To, however, they disappear, so that all hard domains become soft. When the VBLs in walls are compressed, the harder the domain, the lower its softening temperature. During softening, the way of VBL disappearance is sudden break down of the whole chain.
Reactions of substituted pyridylalkanol 6‐CH3PyCH2CH(OH)R (R = Ph (L1H), R = 4‐CH3C6H4 (L2H), R = 4‐OCH3C6H4 (L3H), R = 4‐ClC6H4 (L4H), R = 4‐BrC6H4 (L5H), R = 4‐CF3C6H4 (L6H)) with Ru3(CO)12 in refluxing tetrahydrofuran afforded the corresponding ruthenium carbonyl complexes [6‐CH3PyCH2CHRO]2Ru3(CO)8 (R = Ph (1a), R = 4‐CH3C6H4 (1b), R = 4‐OCH3C6H4 (1c), R = 4‐ClC6H4 (1d), R = 4‐BrC6H4 (1e), R = 4‐CF3C6H4 (1f)) in good yields. These ruthenium complexes were well characterized using elemental analysis and Fourier transform infrared and NMR spectroscopies. Furthermore, their crystal structures were determined using single‐crystal X‐ray diffraction analysis. Complexes 1a–1f were found to be highly active toward oxidation of a wide range of primary and secondary alcohols to corresponding aldehydes and ketones within 5 minutes in the presence of N‐methylmorpholine‐N‐oxide as oxidant.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.