Cyclodextrins Modified/Coated Metal–Organic Frameworks

Recent progress about a novel organic–inorganic hybrid materials, namely cyclodextrins (CDs) modified/coated metal–organic frameworks (MOFs) is summarized by using a special categorization method focusing on the interactions between CDs and MOFs moieties, such as ligand–metal cations interactions, supramolecular interactions including host–guest interactions and hydrogen bonding, as well as covalent bonds. This review mainly focuses on the interactions between CDs and MOFs and the strategy of combining them together, diverse external stimuli responsiveness of CDs-modified/coated MOFs, as well as applications of these hybrid materials to drug delivery and release system, catalysis and detection materials. Additionally, due to the importance of investigating advanced chemical architectures and physiochemical properties of CDs-modified/coated MOFs, a separate section is involved in diverse characterization methods and instruments. Furthermore, this minireview also foresees future research directions in this rapidly developing field.

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Applications of Cyclodextrins Modified/Coated Metal–Organic Frameworks

10.32545/encyclopedia202003.0001.v1 ◽

2020 ◽

Author(s):

Huacheng Zhang

Keyword(s):

Aqueous Solutions ◽

Metal Organic Frameworks ◽

Physiochemical Properties ◽

Practical Applications ◽

Extraction And Separation ◽

Hybrid Delivery ◽

Coated Metal ◽

Metal Organic ◽

Noncovalent Bonds ◽

External Stimuli

The introduction of cyclodextrins (CDs) via noncovalent bonds could improve various physiochemical properties of metal-organic frameworks (MOFs) and expand their practical applications in aqueous solutions, for example, biocompatible CDs could improve the solubility of CDs-coated MOFs as a hybrid delivery system. And external-stimuli responsiveness of CDs-coated MOFs is key for widening applications in controlled drug releasing system, catalysis, detection, extraction and separation.

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Strategies for the Development of pH-Responsive Synthetic Polypeptides and Polymer-Peptide Hybrids: Recent Advancements

Polymers ◽

10.3390/polym13040624 ◽

2021 ◽

Vol 13 (4) ◽

pp. 624

Author(s):

Cintya Dharmayanti ◽

Todd A. Gillam ◽

Manuela Klingler-Hoffmann ◽

Hugo Albrecht ◽

Anton Blencowe

Keyword(s):

Functional Groups ◽

Hybrid Materials ◽

Tumour Microenvironment ◽

The Body ◽

Supramolecular Interactions ◽

Biological Interactions ◽

Ph Responsive ◽

Form Complex ◽

Synthetic Polypeptides ◽

External Stimuli

Synthetic polypeptides and polymer-peptide hybrid materials have been successfully implemented in an array of biomedical applications owing to their biocompatibility, biodegradability and ability to mimic natural proteins. In addition, these materials have the capacity to form complex supramolecular structures, facilitate specific biological interactions, and incorporate a diverse selection of functional groups that can be used as the basis for further synthetic modification. Like conventional synthetic polymers, polypeptide-based materials can be designed to respond to external stimuli (e.g., light and temperature) or changes in the environmental conditions (e.g., redox reactions and pH). In particular, pH-responsive polypeptide-based systems represent an interesting avenue for the preparation of novel drug delivery systems that can exploit physiological or pathological pH variations within the body, such as those that arise in the extracellular tumour microenvironment, intracellularly within endosomes/lysosomes, or during tissue inflammation. Here, we review the significant progress made in advancing pH-responsive polypeptides and polymer-peptide hybrid materials during the last five years, with a particular emphasis on the manipulation of ionisable functional groups, pH-labile linkages, pH-sensitive changes to secondary structure, and supramolecular interactions.

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Synthesis of graphene oxide/metal–organic frameworks hybrid materials for enhanced removal of Methylene blue in acidic and alkaline solutions

Journal of Chemical Technology & Biotechnology ◽

10.1002/jctb.5419 ◽

2017 ◽

Vol 93 (3) ◽

pp. 698-709 ◽

Cited By ~ 22

Author(s):

Shuaiqi Zhao ◽

Ding Chen ◽

Fuhua Wei ◽

Nini Chen ◽

Zhao Liang ◽

...

Keyword(s):

Methylene Blue ◽

Graphene Oxide ◽

Hybrid Materials ◽

Metal Organic Frameworks ◽

Alkaline Solutions ◽

Metal Organic

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Photofunctional Rare Earth Hybrid Materials Based on Functionalized Metal–Organic Frameworks

Photofunctional Rare Earth Hybrid Materials - Springer Series in Materials Science ◽

10.1007/978-981-10-2957-8_5 ◽

2017 ◽

pp. 107-134

Author(s):

Bing Yan

Keyword(s):

Rare Earth ◽

Hybrid Materials ◽

Metal Organic Frameworks ◽

Metal Organic

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Cellulose–metal organic frameworks (CelloMOFs) hybrid materials and their multifaceted Applications: A review

Coordination Chemistry Reviews ◽

10.1016/j.ccr.2021.214263 ◽

2022 ◽

Vol 451 ◽

pp. 214263

Author(s):

Hani Nasser Abdelhamid ◽

Aji P. Mathew

Keyword(s):

Hybrid Materials ◽

Metal Organic Frameworks ◽

Metal Organic

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Research on the Correlation between Trait Mindfulness and the Emotional Mood

Journal of Contemporary Educational Research ◽

10.26689/jcer.v4i1.961 ◽

2019 ◽

Vol 4 (1) ◽

Author(s):

Kaiyi Han

Keyword(s):

Negative Emotions ◽

Negative Mood ◽

Mood States ◽

Future Research ◽

Trait Mindfulness ◽

Five Facet Mindfulness Questionnaire ◽

Research Directions ◽

Future Research Directions ◽

Negative Mood States ◽

External Stimuli

The aim of this study was to confirm if there was a correlation between trait mindfulness, negative mood states, and stress. Our study is based on the assumption that practicing mindfulness did have the efficacy and ability to regulate negative emotions and thoughts produced by negativity-inducing external stimuli. A hundred and fifteen individuals (M age = 32.17 years, SD = 8.21, 59 males and 56 females) mostly from Beijing and Shanghai completed a series of measures, which included the Five-Facet Mindfulness Questionnaire (FFMQ), the Profile of Mood States-Brief Questionnaire (POMS-B), and the Stress Self-Perception Scale. After analyzing the collected data with SPSS 22.0, results showed that trait mindfulness has a significant relation with both negative mood states and stress, the relation being negative mood states and stress having a negative correlation to mindfulness and vice versa. This study verified the ability of mindfulness to stabilize and regulate negative emotions like depression and indicated the importance of practicing mindfulness as a way to cope with negativity-inducing stimuli and associated thoughts and emotions. Limitations and future research directions are discussed.

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Metal–Organic Framework Hybrid Materials and Their Applications

Crystals ◽

10.3390/cryst8080325 ◽

2018 ◽

Vol 8 (8) ◽

pp. 325 ◽

Cited By ~ 18

Author(s):

Joshua Sosa ◽

Timothy Bennett ◽

Katherine Nelms ◽

Brandon Liu ◽

Roberto Tovar ◽

...

Keyword(s):

Small Molecules ◽

Hybrid Materials ◽

Metal Organic Framework ◽

Metal Organic Frameworks ◽

Gas Storage ◽

Superior Performance ◽

Separation Energy ◽

New Materials ◽

Metal Organic ◽

Covalent Modifications

The inherent porous nature and facile tunability of metal–organic frameworks (MOFs) make them ideal candidates for use in multiple fields. MOF hybrid materials are derived from existing MOFs hybridized with other materials or small molecules using a variety of techniques. This led to superior performance of the new materials by combining the advantages of MOF components and others. In this review, we discuss several hybridization methods for the preparation of various MOF hybrids with representative examples from the literature. These methods include covalent modifications, noncovalent modifications, and using MOFs as templates or precursors. We also review the applications of the MOF hybrids in the fields of catalysis, drug delivery, gas storage and separation, energy storage, sensing, and others.

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Temperature dependence of adsorption hysteresis in flexible metal organic frameworks

Communications Chemistry ◽

10.1038/s42004-020-00429-3 ◽

2020 ◽

Vol 3 (1) ◽

Cited By ~ 1

Author(s):

Shamsur Rahman ◽

Arash Arami-Niya ◽

Xiaoxian Yang ◽

Gongkui Xiao ◽

Gang (Kevin) Li ◽

...

Keyword(s):

Temperature Dependence ◽

Capillary Condensation ◽

Metal Organic Frameworks ◽

Sorption Isotherms ◽

Separation Performance ◽

Process Simulations ◽

Metal Organic ◽

Flexible Metal ◽

Pressure Swing ◽

External Stimuli

Abstract“Breathing” and “gating” are striking phenomena exhibited by flexible metal-organic frameworks (MOFs) in which their pore structures transform upon external stimuli. These effects are often associated with eminent steps and hysteresis in sorption isotherms. Despite significant mechanistic studies, the accurate description of stepped isotherms and hysteresis remains a barrier to the promised applications of flexible MOFs in molecular sieving, storage and sensing. Here, we investigate the temperature dependence of structural transformations in three flexible MOFs and present a new isotherm model to consistently analyse the transition pressures and step widths. The transition pressure reduces exponentially with decreasing temperature as does the degree of hysteresis (c.f. capillary condensation). The MOF structural transition enthalpies range from +6 to +31 kJ·mol−1 revealing that the adsorption-triggered transition is entropically driven. Pressure swing adsorption process simulations based on flexible MOFs that utilise the model reveal how isotherm hysteresis can affect separation performance.

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