A green emissive amorphous fac-Alq3 solid generated by grinding crystalline blue fac-Alq3 powder

Bi, Hai; Chen, Dong; Li, Di; Yang, Yuan; Xia, Dong; Zhang, Zuolun; Zhang, Hongyu; Wang, Yue

doi:10.1039/c1cc00060h

Cited by 55 publications

(22 citation statements)

References 28 publications

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“…In contrast, the PXRD of the ground solid exhibits weak and board signals. The reduction in the diffraction peaks intensity and/or number demonstrates a morphological transition from the crystalline to amorphous [54,55]. Similar observations are also found in C1 and C2 (Fig.…”

Section: Piezochromic Behaviorsupporting

confidence: 82%

Efficient piezochromic luminescence from tetraphenylethene functionalized pyridine-azole derivatives exhibiting aggregation-induced emission

et al. 2015

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Section: Piezochromic Behaviorsupporting

confidence: 82%

Efficient piezochromic luminescence from tetraphenylethene functionalized pyridine-azole derivatives exhibiting aggregation-induced emission

et al. 2015

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“…Alq3 showed strong green fluorescence when irradiated with 405 nm energy, and the main peak was measured at 520 nm, as shown in Figure 4. In many previous studies, it was difficult to quantitatively compare the PL characteristics, such as the intensity or full width at half maximum (FWHM), of Alq3 crystals by using bulk CCDs or by measuring solid PL in solution or large areas [30][31][32]. In this study, a quantitative comparison was performed by measuring solid PL from a single Alq3 crystal using a laser with a spot size of approximately 200 nm.…”

Section: Resultsmentioning

confidence: 99%

Fine Fabrication and Optical Waveguide Characteristics of Hexagonal tris(8-hydroxyquinoline)aluminum(Ⅲ) (Alq3) Crystal

et al. 2020

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Herein, we reported on the precise growth and optical waveguide characteristics of hexagonal tris(8-hydroxyquinoline)aluminum(Ⅲ) (Alq3) micro-crystals (MCs). The hexagonal Alq3 MCs were prepared using surfactant-assisted assembly growth with the help of cetyltrimethylammoniumbromide (CTAB), in which the crystallization occurred as a result of molecular assembly and packing. Also, we adjusted the molar ratio of Alq3 and CTAB for the control degree of crystallization. The formation and structure of Alq3 MCs were investigated using field-emission scanning electron microscopy and X-ray diffraction pattern experiments, respectively. The solid-state laser confocal microscope-photoluminescence spectra and charge-coupled device images for the Alq3 MCs were measured to study the luminescence efficiency and colors, respectively. The optical waveguide performance of the hexagonal Alq3 MCs was measured for each side direction. According to our results, crystalline Alq3 micro-crystals are promising materials for application to the development of optical communication devices.

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“…Babashkina et al reported one silver complex that shows mechanoresponsive luminescence which is accompanied by mechanical stimuli‐induced reaction . Mechanochromic luminescence of tris(8‐hydroxyquinoline)aluminium (Alq 3 ) was also reported by Zhang and Wang et al in 2011 . Ghedini et al reported that rubbing the surface of a thin film of an ionic iridium complex 15 induces a change of the photoluminescence color from green to orange .…”

Section: Brief Introduction To Mechanoresponsive Luminescencementioning

confidence: 90%

Mechanoresponsive Luminescent Molecular Assemblies: An Emerging Class of Materials

et al. 2015

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Abstract:The possibility to change the morphology of organic and organometallic materials through mechanical stimulation is emerging as a general and powerful concept for the design of functional materials. In particular the photophysical properties, such as photoluminescence color, quantum yield and emission lifetime of organic and organometallic fluorophores can significantly depend on the molecular packing, enabling the development of molecular materials with mechanoresponsive luminescence characteristics. Indeed, an increasing number of studies have shown in recent years that mechanical force can be utilized to change the molecular arrangement, and thereby the optical response, of luminescent molecular assemblies of π-conjugated organic or organometallic molecules. This report reviews the development of such mechanoresponsive luminescent (MRL) molecular assemblies consisting of organic or organometallic molecules and summarizes emerging trends in this research field.After a brief introduction of mechanoresponsive luminescence observed in molecular assemblies, the concept of "luminescent molecular domino" is introduced, before molecular materials that show turn-on/off of photoluminescence in response to mechanical stimulation are reviewed. Mechanically stimulated multi-color changes and water-soluble MRL materials are also highlighted and approaches that combine the concept of MRL molecular assemblies with other materials types are presented in the last part of this progress report.

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A green emissive amorphous fac-Alq3 solid generated by grinding crystalline blue fac-Alq3 powder

Abstract: A novel green emissive Alq(3) solid with a facial isomeric form has been obtained by grinding the typical blue luminescent fac-Alq(3) crystalline powder. This is the first report, to the best of our knowledge, that a fac-Alq(3) isomer emits green light.

Cited by 55 publications

References 28 publications

Efficient piezochromic luminescence from tetraphenylethene functionalized pyridine-azole derivatives exhibiting aggregation-induced emission

Efficient piezochromic luminescence from tetraphenylethene functionalized pyridine-azole derivatives exhibiting aggregation-induced emission

Fine Fabrication and Optical Waveguide Characteristics of Hexagonal tris(8-hydroxyquinoline)aluminum(Ⅲ) (Alq3) Crystal

Mechanoresponsive Luminescent Molecular Assemblies: An Emerging Class of Materials

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