Functional Organic Nanocrystals

Baba, Koichi; Kasai, Hitoshi; Nishida, Kohji; Nakanishi, Hachiro

doi:10.5772/16948

Cited by 14 publications

(24 citation statements)

References 37 publications

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“…Polydispersity of the system is also improved as compared to nanoGUMBOS before microwave irradiation because of the volumetric absorption capacity of the medium when exposed to microwave radiation. Thus, heating is more homogeneous and efficient than via regular conduction and convection heating, subsequently affecting the rate of nanoparticle formation [41][42][43].…”

Section: Template-free Sonication Bath Plus Microwave Assistancementioning

confidence: 99%

Strategies for controlled synthesis of nanoparticles derived from a group of uniform materials based on organic salts

Hamdan

Dumke

El‐Zahab

et al. 2015

Journal of Colloid and Interface Science

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Section: Template-free Sonication Bath Plus Microwave Assistancementioning

confidence: 99%

Strategies for controlled synthesis of nanoparticles derived from a group of uniform materials based on organic salts

Hamdan

Dumke

El‐Zahab

et al. 2015

Journal of Colloid and Interface Science

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“…Aromatic ONCs can be robust and exhibit useful photonic properties, [11][12][13][14][15][16] yet their fabrication is based mostly on empirical methods. 17 Addressing this challenge, we have recently demonstrated that rational design based on hydrophobicity tuning can be applied to control structure and morphology, resulting in soluble and tunable ONCs. 14,18,19 We have also reported on a new family of ONCs that possess strong nonlinear optical (NLO) response (second harmonic generation, SHG).…”

Section: Introductionmentioning

confidence: 99%

Composites of hydrophilic polymers and organic nanocrystals enable enhanced robustness

Dutta

Sui

Weissman

et al. 2019

Polymers for Advanced Techs

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We describe a new family of composite materials, polymer/organic nanocrystal (ONC) hybrids. These were prepared from soluble ONCs based on perylene diimides (PDI) and water‐soluble polymers (sodium alginate and polyvinyl alcohol). Polymer/ONC films were characterized by optical spectroscopy, electron microscopy, and tensile strength studies. The films show enhanced chemical and mechanical stability due to synergy between the constituents. The hybrid films are stable in both water and organic solvents, unlike the individual components. The ONCs we employed possess nonlinear optical activity (second harmonic generation, SHG); they showed improved photostability (stable SHG under laser light) in the hybrids. Tensile strength enhancement (as high as twofold in the film having just 2.4% ONCs by weight) was observed as revealed by mechanical measurements. Hybrids with aligned ONCs were also prepared using simple extrusion via syringe needle followed by gelation. Employing ONCs in polymeric hybrid materials enables facile fabrication in aqueous media, synergy, chemical, mechanical, and photostability as well as useful photofunction (SHG), introducing a versatile class of composite materials.

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“…105,106 These properties have found applications in areas such as liquid crystal displays and organic field effect transistors, however, the studies were limited to single components systems. 107 Then in 2006 MacGillivray introduced a sonochemical method for the preparation of nanometer-scale cocrystals. 108 Nano-cocrystals are inherently more challenging to synthesize from a fabrication technique, such as the reprecipitation method, owing to the inherent solubility difference between the cocrystal components.…”

Section: Crystal Engineeringmentioning

confidence: 99%

“…phthalocyanine) attain the thermal requirements of the vapor growth technique. 107 Consequently, Nakanishi and coworkers reported a reprecipitation method for the fabrication of organic nanocrystals in the absence of harsh conditions (e.g. high temperature).…”

Section: Introductionmentioning

confidence: 99%

“…Led by the reprecipitation method, additional techniques have been developed that employ methodologies such as laser ablation, microwave-irradiation, microemulsions, and membrane reactors all of which have contributed to an increase in the number of reported organic nanocrystals. 107,219 The library of organic nanocrystals largely consists of π-conjugated molecules, non-linear optical dyes, fluorescent dyes, and fullerene. 107 Coupled to the increase in organic nanocrystals was the discovery that indeed organic nanocrystals exhibit a diverse set of size-dependent properties.…”

Section: Introductionmentioning

confidence: 99%

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Expansions of supramolecular chemistry

Sander¹

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Crystal engineering has matured into a design-driven field based on the exploitation of reliable interactions between the functional groups of molecules so as to achieve desired properties. The utility of crystal engineering has been realized in a breadth of fields and, as a microcosm of crystal engineering, this thesis will explore the application of crystal engineering in the pharmaceutical sciences, nanotechnology, synthetic chemistry, materials science, and biomedical imaging.As the trend in drug development continues to skew towards molecules with poor aqueous solubility the ability improve the physicochemical properties of a pharmaceutical agent, especially via non-covalent means, has become crucial. One method to impart improved physiochemical properties to pharmaceutical agents is through cocrystallization. A portion of this thesis will focus on the design-driven development of pharmaceutical cocrystals so as to impart improved mechanical properties to acetaminophen. As part of our investigation, we observed unexpected intermolecular interactions between the constituents of our cocrystals, which will contribute to the continued development of crystal engineering. In addition, we are interested in developing a methodology for the reliable fabrication of organic nanocrystals based on multi-component solids. Whereas the field of inorganic nanocrystals has blossomed, organic nanocrystals have remained largely underdeveloped. To expand the field of organic nanocrystals we turned to the synthesis of pharmaceutical nano-cocrystals.Specifically, we determined a sonochemical approach combined with multiple solvents and a surfactant could effectively synthesize pharmaceutical nano-cocrystals. As part of our desire to synthesize complex, multi-component, organic nanocrystals we also investigated the ability of a sonochemical approach to synthesize host-guest nanocrystals.In particular, the results demonstrated that sonochemistry successfully fabricates nano-Abstract Approved: _______________________________________ Thesis Supervisor _______________________________________

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Functional Organic Nanocrystals

Cited by 14 publications

References 37 publications

Strategies for controlled synthesis of nanoparticles derived from a group of uniform materials based on organic salts

Strategies for controlled synthesis of nanoparticles derived from a group of uniform materials based on organic salts

Composites of hydrophilic polymers and organic nanocrystals enable enhanced robustness

Expansions of supramolecular chemistry

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