9‐Borabicyclononane Bipyridyl Complexes: Synthesis, Luminescence, and Electronic Characterization

Abstract

This work presents the use of organoboron compounds as anolytes in redox flow batteries. Through the study of their structural, electrochemical, and photophysical properties, four bipyridyl boronium salts show potential for application in such batteries. The compounds were synthesized in moderate to high yields by previously published methods. We find [a

Synthesis, structures, and solid-state photoresponsive color change behavior of boronium complexes bearing a pyridine-imine, diimine, or pyridine-ketone bidentate ligand

“…2–5 They also act as functional compounds such as hypergolic ionic liquids, 6–8 anion receptors, 9 fluorescent materials, 10,11 and disinfectants. 12 Among them, bipyridine-boronium complexes have attracted attention as redox-active compounds in 4,4′-bipyridine-boronium 13 or 2,2′-bipyridine-boronium complexes, 10,14–21 because their bi(pyridinium) structures resemble viologens or diquats, which makes them easily reducible.…”

“…1 These complexes are of interest as research targets in various fields because of their characteristic molecular structures and properties, for example, they are key intermediates in some catalytic reactions. [2][3][4][5] They also act as functional compounds such as hypergolic ionic liquids, [6][7][8] anion receptors, 9 fluorescent materials, 10,11 and disinfectants. 12 Among them, bipyridine-boronium complexes have attracted attention as redox-active compounds in 4,4′-bipyridine-boronium 13 or 2,2′-bipyridine-boronium complexes, 10,[14][15][16][17][18][19][20][21] because their bi( pyridinium) structures resemble viologens or diquats, which makes them easily reducible.…”

“…[2][3][4][5] They also act as functional compounds such as hypergolic ionic liquids, [6][7][8] anion receptors, 9 fluorescent materials, 10,11 and disinfectants. 12 Among them, bipyridine-boronium complexes have attracted attention as redox-active compounds in 4,4′-bipyridine-boronium 13 or 2,2′-bipyridine-boronium complexes, 10,[14][15][16][17][18][19][20][21] because their bi( pyridinium) structures resemble viologens or diquats, which makes them easily reducible. 9-Borabicyclo[3.3.1]nonane (9-BBN)-based 2,2′-bipyridineboronium complex 1, (2,2′-bipyridine-N,N′)(1,5-cyclooctanediyl)boronium triflate, and its derivatives and analogs are redox-active boronium complexes.…”

A rapid construction of new boron heterocycles and evaluation of photophysical properties of iminoboronates

“…In fact, many boron heterocycles also have important applications in supramolecular chemistry and materials science. 17–21…”

“…In fact, many boron heterocycles also have important applications in supramolecular chemistry and materials science. [17][18][19][20][21] Accordingly, the synthesis of new boron heterocyclic compounds has attracted significant attention. The most common design strategy employed in developing boron heterocycles involves replacing the C-X (X = O, N) unit with isosteric and isoelectronic B-N or B-O bonds.…”