Luminescent Chromism of Boron Diketonate Crystals: Distinct Responses to Different Stresses

Wang, Lu; Wang, Kai; Zou, Bo; Ye, Kaiqi; Zhang, Hongyu; Wang, Yue

doi:10.1002/adma.201500589

Cited by 255 publications

(134 citation statements)

References 30 publications

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“…45 The luminescent organic crystal was prepared with boron diketonate. Block orange crystals were obtained from a dichloromethane solution of boron diketonate.…”

Section: Mechanofluorochromic (Mfc) Materialsmentioning

confidence: 99%

Recent progress of optical functional nanomaterials based on organoboron complexes with β-diketonate, ketoiminate and diiminate

2015

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The synthesis and application of organoboron complexes are a highly relevant topic owng to their unique characteristics. Based on their emissive properties, these complexes have been used to make novel optical materials and devices; boron β-diketonate is a simple and robust organoboron complex. From a series of recent studies, unique and versatile optical properties have been reported. In this review, we introduce the results of primarily recent studies on boron diketonate and related compounds containing polymers and particularly explain their optical properties. Initially, the multi-emission of boron diketonate derivatives and its application to biotechnology are explained. Next, the formation of nanostructures and its emission properties are demonstrated. The modulation of optical properties by mechanical stress is also presented. Finally, recent progress in the development of solid-emissive materials are shown with boron diketonates and their derivatives, which have aggregation-induced emission properties. The versatility of boron diketonates as a building block for the preparation of functional optical materials is the focus of this review.

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“…45 The luminescent organic crystal was prepared with boron diketonate. Block orange crystals were obtained from a dichloromethane solution of boron diketonate.…”

Section: Mechanofluorochromic (Mfc) Materialsmentioning

confidence: 99%

Recent progress of optical functional nanomaterials based on organoboron complexes with β-diketonate, ketoiminate and diiminate

2015

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“…This compound had two polymorphs: 2OC,a no range crystal with its main emission centered at 585 nm, and 2RC,ared crystal with ab road emission band at 605 nm. [14] When the orange crystals of 2OC were smashed with as tainless steel spoon, the fluorescencei ntensity of the sample was significantly enhanced with the emission band blueshifted from 585 to 565 nm. The molecular arrangements of the main bulk were unchanged by the molecular perturbations;t his indicates that the tensile force disrupted the weak intermolecular interaction between the dimers (Figure 2a), thusr esulting in blueshifted emission and enhanced luminescentintensity.…”

Section: Multicolor Changes Induced By Different Applied Mechanical Fmentioning

confidence: 99%

Mechanically Induced Multicolor Change of Luminescent Materials

et al. 2015

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Mechanofluorochromic or piezochromic fluorescence chemistry involves the switching and tuning of the luminescent properties of solid-state materials induced by exogenous forces, such as grinding, shearing, compression, tension, and so forth. Up until now, most reported mechanochromic systems, including liquid crystals, organic molecules, organometallic compounds, polymers, and dye-doped polymers, have displayed reversible two-color changes, which arise from either supramolecular or chemical structure transformations. However, fluorescent materials that undergo mechanically induced multicolor changes remain rare; this Minireview is focused on such materials. Topics are categorized according to the different applied forces that are required to induce the multicolor change, including mechanical control of either the supramolecular structures or the chemical structures, and mechanical control of both the supramolecular structures and chemical structures.

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“…One level of modification involves altering the ligand scaffold, such as extending the π-conjugation and or the addition of heavy-atoms. 18 The role of changing the anciliary ligands coordinated to the boron center has also been studied; most typically phenyl, 19 pentfluorophenyl, 20 or cyano groups 21 have been explored. Some of these modifications lead to a smaller HOMO–LUMO energy gap, providing red-shifted absorption and emission.…”

Section: Introductionmentioning

confidence: 99%

Thienyl Difluoroboron β-Diketonates in Solution and Polylactide Media

et al. 2016

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Difluoroboron β–diketonates have impressive optical properties in both solution and the solid state. In particular, both fluorescence and room-temperature phosphorescence are present when the dyes are confined to a rigid matrix, such as poly(lactic acid) (PLA). To expand current knowledge and color range capabilities of this unique type of multi-emitting chromophore, a series of thienyl-substituted BF2bdk complexes have been synthesized. The photophysical properties were investigated in methylene chloride solution and in the solid state as dye/PLA blends. By varying donor ability, i.e. methyl, phenyl, methoxyl, and thienyl substituents, and by changing the dye loading in the PLA media (0.1–10% dye loading) red-shifted emission was achieved, important for biological imaging applications. In dilute CH2Cl2 solution, complexes exhibited absorptions ranging from 350 – 420 nm, solid-state fluorescence in PLA ranging from 390 – 500 nm, and oxygen sensitive phosphorescence ranging from 540 – 585 nm in PLA blends. Promising candidates as dye/PLA blends serve as models for dyepolymer conjugates for application as biological oxygen nanoprobes.

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Luminescent Chromism of Boron Diketonate Crystals: Distinct Responses to Different Stresses

Cited by 255 publications

References 30 publications

Recent progress of optical functional nanomaterials based on organoboron complexes with β-diketonate, ketoiminate and diiminate

Recent progress of optical functional nanomaterials based on organoboron complexes with β-diketonate, ketoiminate and diiminate

Mechanically Induced Multicolor Change of Luminescent Materials

Thienyl Difluoroboron β-Diketonates in Solution and Polylactide Media

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