The on–off switch of charge separated states in a new series of pyridine-vinylene linked porphyrin–C60 conjugates was detected by EPR at 77 K.

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The title compound, C11H15BrNO+·Cl−, was obtained as a precursor within our current program for the synthesis of new β-amino­alcohols via a Mannich-type reaction. The protonated amino N atom is hydrogen bonded to the chloride anion. With exception of one methyl group, the cation is approximately planar (r.m.s. deviation for all non H-atoms = 0.069 Å).

Knowing about the evolution of atomic models throughout history is a fundamental topic to learn about atomic structure. This paper describes how identifying keywords from a musical YouTube video provides a stimulating activity for learning this topic in a chemistry class in middle school. The main goal was to show how a fun and interesting activity can be planned using a free access video and how great results can be achieved during the educational process of “teaching-learning” when generating a high level in interest in the classroom. For this purpose, a group of students was previously characterized reporting that many students showed preferences for visual and auditory instructions in their learning processes. Three (3) experimental groups and one (1) control group were visited to evaluate learning goals. Within the control group, only 22% achieved the test as it was carried out, while in other groups, 98% passed the test using methods from this research. This paper explains that the activity was planned and evaluated in three (3) ways: video relevance, development, and methodology of final evaluation, with successful results and quite positive comments about the experience from students.