Genetic engineering of inorganic functional modular materials

Li, Yi; Yu, Jihong

doi:10.1039/c6sc00123h

Cited by 10 publications

(6 citation statements)

References 92 publications

(53 reference statements)

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“…The diverse structures of the conventional porous frameworks including zeolites and MOFs are usually obtained heuristically. In zeolite frameworks, the angles of the oxygen bridges that connect the adjacent tetrahedral atoms can be varied to create different structures. − Although the targeted structural design and porosity control of MOFs can be achieved using the strategy of isoreticular synthesis with expanded or decorated ligands (IRMOFs), , the structural diversity of the secondary building unit (SBU) simultaneously enriches the MOF structures and impedes structural prediction. The building units of PAFs that are used in their design and synthesis have individualized geometry and the chemical connectivity in the coupling reactions is explicit.…”

Section: Design Principles and Synthesis Of Pafsmentioning

confidence: 99%

Porous Aromatic Frameworks (PAFs)

2020

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Porous aromatic frameworks (PAFs) represent an important category of porous solids. PAFs possess rigid frameworks and exceptionally high surface areas, and, uniquely, they are constructed from carbon−carbon−bond−linked aromatic-based building units. Various functionalities can either originate from the intrinsic chemistry of their building units or are achieved by postmodification of the aromatic motifs using established reactions. Specially, the strong carbon−carbon bonding renders PAFs stable under harsh chemical treatments. Therefore, PAFs exhibit specificity in their chemistry and functionalities compared with conventional porous materials such as zeolites and metal organic frameworks. The unique features of PAFs render them being tolerant of severe environments and readily functionalized by harsh chemical treatments. The research field of PAFs has experienced rapid expansion over the past decade, and it is necessary to provide a comprehensive guide to the essential development of the field at this stage. Regarding research into PAFs, the synthesis, functionalization, and applications are the three most important topics. In this thematic review, the three topics are comprehensively explained and aptly exemplified to shed light on developments in the field. Current questions and a perspective outlook will be summarized. CONTENTS 3. General Strategies and Examples For PAF Functionalization 8951 3.1. Direct Synthesis 8951 3.2. Postsynthetic Modification 8952 3.3. Post Modification of PAFs with Preanchored Sites 8953 3.4. PAFs with Charged Frameworks 8953 3.5. Wettability and Polarity of PAF Frameworks 8953 4. State-of-the-Art of PAF Applications 8954 4.1. Gas Adsorption 8954 4.1.1. Hydrogen Storage 8954 4.1.2. Methane Adsorption 8958 4.1.3. CO 2 Capture 8960 4.1.4. Adsorptive Separation of Hydrocarbon Mixtures 8965 4.1.5. Capture of Ammonia 8966 4.2. Membrane Separation 8966 4.3. Adsorption of Hazardous Organic Compounds 8968 4.3.1. Capture of Hazardous Organic Chemicals 8968 4.3.2. Enrichment of Trace Organic Compounds for Analysis 8969

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Section: Design Principles and Synthesis Of Pafsmentioning

confidence: 99%

Porous Aromatic Frameworks (PAFs)

2020

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“…Development of advanced materials for capture and sequestration of harmful/greenhouse gas molecules from ambient atmosphere is becoming an intensive research topic. Such advanced materials are in high demand in various fields such as environmental protection. − To date, design and optimization of new adsorbing materials have been mainly based on the so-called “trial-and-error” method. − Besides being labor-intensive and time-consuming, using the trial-and-error method is difficult to improve the material to reach the best performance. CO 2 capture material is taken as an example.…”

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confidence: 99%

Resonant-Gravimetric Identification of Competitive Adsorption of Environmental Molecules

et al. 2017

Anal. Chem.

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Understanding competitive adsorption relationship among various ambient gases is important in adsorbing-material development for capturing environmentally harmful gas. For example, environmental interfering factors (e.g., moisture) can affect the competitive gas-molecule adsorption that needs to be clarified. Due to a lack of method to quantitatively study the dynamic adsorbing process (e.g., real-time-counting adsorbed molecule number), it is difficult to reveal the competitive adsorption mechanism. Still using conventional "trial-and-error" method hinders the development of high-performance adsorbing materials; thereby new technology is in high demand to address the issue. This study opens up a three-step resonant-gravimetric analysis method by using ultrasensitive resonant cantilevers. The three experimental steps are sequentially for qualitative analysis, quantitative determination, and thermodynamic-level identification about the competitive adsorption relationship among the environmental gas molecules. Previous studies indicate that the zeolitic-imidazolate framework (ZIF) of ZIF-8 nanocrystals has a low affinity to environmental CO. This conclusion is confirmed in this study by evaluating ZIF-8 with the three experimental steps, sequentially for qualitative judgment of adsorbability, quantitative determination of hydrous molecule structure in real air, and quantitative extraction of thermodynamic enthalpy, ΔH°. By figuring out the competitive interface-adsorption relationship, we verified that ZIF-8 cannot adsorb CO in real air. However, for the first time, ZIF-8 is identified as an excellent adsorbent to environmental NO.

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“…This periodicity doubles, triples and quadruples in the 4H, 6H and 8H polytypes, respectively. The family of rhombohedral polytypes is labeled with R, for example 9R, 12R and 15R (Mardix, 1986;Lee et al, 2006;Morkoç et al, 1994;Li & Yu, 2016;Pá rtay et al, 2017). With the increase of the polytype number, the stacking sequences become more complex, e.g.…”

Section: Resultsmentioning

confidence: 99%

“…Usually, the individual layers constituting the polytypes are structurally identical, however, the position of these layers relative to their neighboring layers can vary, leading to a multitude of stacking variants. Although there exist quite a number of examples of compounds crystallizing in several such polytypes (Mardix, 1986;Lee et al, 2006;Morkoç et al, 1994;Li & Yu, 2016;Pá rtay et al, 2017), it is not as common a phenomenon in experimental materials science as one would expect and there are still many unanswered questions, e.g. why do some compounds show polytypic behavior and others do not?…”

Section: Introductionmentioning

confidence: 99%

ZnO/ZnS (hetero)structures: ab initio investigations of polytypic behavior of mixed ZnO and ZnS compounds

Zagorac

Schön

et al. 2018

Acta Crystallogr B Struct Sci Cryst Eng Mater

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The range of feasible ZnO/ZnS polytypes has been explored, predicting alternative structural arrangements compared with previously suggested or observed structural forms of ZnO/ZnS compounds, including bulk crystal structures, various nanostructures, heterostructures and heterojunctions. All calculations were performed ab initio using density functional theory–local density approximation and hybrid Heyd–Scuseria–Ernzerhof functionals. Specifically, pure ZnO and ZnS compounds and mixed ZnO1–x S x compounds (x = 0.20, 0.25, 0.33, 0.50, 0.60, 0.66 and 0.75) are investigated and a multitude of possible stable polytypes for ZnO/ZnS compounds creating new possibilities for synthesis of new materials with improved physical and chemical properties are identified.

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Genetic engineering of inorganic functional modular materials

Abstract: In silico enumeration and interpretation of the stacking sequences of layer modules facilitates the innovation of new inorganic functional materials.

Cited by 10 publications

References 92 publications

Porous Aromatic Frameworks (PAFs)

Porous Aromatic Frameworks (PAFs)

Resonant-Gravimetric Identification of Competitive Adsorption of Environmental Molecules

ZnO/ZnS (hetero)structures: ab initio investigations of polytypic behavior of mixed ZnO and ZnS compounds

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