Aggregation-induced emission enhancement of chiral boranils

Abstract

A family of chiral boranils exhibits aggregation-induced emission enhancement.

A Chiral Bis(salicylaldiminato)zinc(II) Complex with Second-Order Nonlinear Optical and Luminescent Properties in Solution

“…The known 2-(R)-(+)-1-phenylethyliminomethyl]phenol was prepared as previously reported by reaction of (R)-1-phenylethylamine with salicylaldehyde in refluxing methanol, as shown in Scheme 1 [84]. Deprotonation with NaHCO 3 and reaction with zinc(acetate) 2 in refluxing ethanol afforded the related bis{2-[(R)-(+)-1-phenylethyliminomethyl]phenolato-N,O}zinc(II) complex [78,80].…”

“…The compound 2-(R)-(+)-1-phenylethyliminomethyl]phenol was prepared following a reported procedure [84]. A solution of (R)-1-phenylethylamine (0.75 mL, 5.8 mmol) and salicylaldehyde (0.30 mL, 3.1 mmol) was refluxed in methanol (10 mL) for 4 h. The solution was cooled at room temperature, and the solvent was removed under reduced pressure, affording a solid which was recrystallized from ethanol, affording the product as a bright yellow powder (0.550 g, 2.44 mmol; 79% yield).…”

Pillar[5]arene-based tunable luminescent materials via supramolecular assembly-induced Förster resonance energy transfer enhancement

“…[1][2][3] However, most of their applications have been impeded because of the intrinsic self-quenching properties of most luminescent dyes. Aggregation-induced emission (AIE) 4,5 and aggregation-induced enhanced emission (AIEE) 6 have been widely developed since 2001, 7 which solved the drawback of self-quenching. [8][9][10] Meanwhile, supramolecular assembly has proven to be a highly efficient way to fabricate smart luminescent materials with well-ordered architectures bearing typical luminophores, new physical properties, optional assembly of entities, and reversible stimuli-responsiveness.…”

Unsymmetrical 2,4,6‐Triarylpyridines as Versatile Scaffolds for Deep‐Blue and Dual‐Emission Fluorophores

“…[15] Heteroaromatic chromophores bearing twisted aromatic substituents have emerged as promising candidates for deep blue emission, [15,16] sometimes through thermally activated delayed fluorescence. [17] This goal is difficult to reach, because fluorophores bearing aromatic substituents which can rotate freely often present very small quantum yields in solution, due to non-radiative relaxation, and only emit when those rotations are restricted, for example in aggregate [4,13,18,19] or crystalline state, [5] or when they interact with macromolecules. [12] This general behavior is named aggregation-induced emission enhancement (AIEE), [20] and has been widely studied and applied to biological imaging [12,21,22] and luminescent devices.…”