Microcrystals of an organic fluorescent dye grown in the presence of various PAMAM dendrimers: Control of the morphology and optical properties

Bertorelle, Franck; Al-Ali, Fatima; Fery–Forgues, Suzanne

doi:10.1155/s1110662x04000285

Cited by 9 publications

(9 citation statements)

References 31 publications

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“…They are potent materials for chemical and biological sensing, 1-3 photocatalysis, 4 optics, [5][6][7] optoelectronics, 8,9 etc. They are potent materials for chemical and biological sensing, 1-3 photocatalysis, 4 optics, [5][6][7] optoelectronics, 8,9 etc.…”

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confidence: 99%

Incorporation of Coumarin 6 in cyclodextrins: microcrystals to lamellar composites

et al. 2015

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Coumarin 6 precipitates in water as microcrystals resulting in a considerable loss in fluorescence yield. Differential interaction of the microcrystals with cyclodextrins of different cavity size enhances the fluorescence yield of the dye by 160 fold in some cases. Highly fluorescent ultrathin lamellar entities form through hydrogen bonding. † Electronic supplementary information (ESI) available: Structure of C6, AFM and SEM images of C6 aer incubation in water (with 1% methanol) for 30 minutes at room temperature, uorescence spectra of C6 in a-, band g-CDs in aqueous environment and time resolved uorescence decay prole for C6 in presence of band g-CDs. See

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confidence: 99%

Incorporation of Coumarin 6 in cyclodextrins: microcrystals to lamellar composites

et al. 2015

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“…To do so, linear polymers such as poly(acrylic acid) (PAA) and calf thymus DNA were used. We report their effect upon the reprecipitation of the organic compound already used in previous works [14,15]. The latter is 4-octylamino-7-nitrobenzoxadiazole (1, Fig.…”

Section: Introductionmentioning

confidence: 98%

“…We recently showed for the first time that the shape and size of organic microcrystals could be nicely tuned by the presence of anionic dendrimers of the poly(amidoamine) series in the reprecipitation medium [14][15][16]. In the present work, we focused on whether dendrimers can be replaced by other macromolecules.…”

Section: Introductionmentioning

confidence: 98%

Morphology control of organic luminescent microcrystals and approach of their optical properties

Abyan¹,

Bîrlă²,

Bertorelle³

et al. 2005

Comptes Rendus. Chimie

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“…The compound was dissolved in a hydrophilic organic solvent, and this concentrated solution was poured into a large volume of water, which acted as a counter solvent for the target compound. Precipitation occurs, which can lead to microcrystal dispersion . It has been shown that several factors influence the size and morphology of the microcrystals …”

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confidence: 99%

Preferential Orientation of Crystals and its Influence on the Emission Wavelength of Acrylonitrile Derivatives Treated with Polar Solvents

Percino

Cerón

Pérez–Gutiérrez

et al. 2019

Crystal Research and Technology

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Photoluminescence properties in solid state and its relationship with structural features of prop-2-enenitrile derivatives containing any of functional groups 4-halogenphenyl, phenyl, 4-dimethylamino, or 4-diphenylamino are investigated. The compounds show change in color from yellow to orange after treatment with dimethyl sulfoxide or dimethyl formamide. Nevertheless, the single-crystal X-ray diffraction for both, the original yellow and the treated orange crystals, does not display any major structural differences. The optical properties are related to the crystal packing and intermolecular interactions such as edge-to-face through the vertices of aromatic rings. The last is supported by the behavior of the presence of functional group. The absorption spectrum in solution for all compounds shows two absorption bands with wavelength of maximum absorption around 390-430 nm and at 290-300 nm. Regardless of the crystal type, the maximum emission in solution was between 450-570 nm. In solid state, yellow crystals exhibit an emission in the 500-530 nm range and in the 580-630 nm range for orange crystals. Results suggest that optical properties are strongly dependent on morphology and habit. Powder X-ray characterization shows a preferential orientation for orange crystals. All compounds are characterized by common spectroscopy techniques, fluorescence, atomic force microscopy and X-ray diffraction.

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Microcrystals of an organic fluorescent dye grown in the presence of various PAMAM dendrimers: Control of the morphology and optical properties

Cited by 9 publications

References 31 publications

Incorporation of Coumarin 6 in cyclodextrins: microcrystals to lamellar composites

Incorporation of Coumarin 6 in cyclodextrins: microcrystals to lamellar composites

Morphology control of organic luminescent microcrystals and approach of their optical properties

Preferential Orientation of Crystals and its Influence on the Emission Wavelength of Acrylonitrile Derivatives Treated with Polar Solvents

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