Luminescent Covalent Organic Frameworks Containing a Homogeneous and Heterogeneous Distribution of Dehydrobenzoannulene Vertex Units

Crowe, Jonathan W.; Baldwin, Luke A.; McGrier, Psaras L.

doi:10.1021/jacs.6b06546

Cited by 184 publications

(130 citation statements)

References 31 publications

Supporting

Mentioning

124

Contrasting

Unclassified

Order By: Relevance

“…These two materials were synthesized from the reaction of DBA[12] with 1,4‐phenylenediboronic acid and pyrene‐2,7‐diyldiboronic acid, respectively. The thermogravimetric analysis (TGA) curves collected by Zhang and McGrier groups revealed that DBA‐COF1 lost the weight of ≈10 % and ≈5 % from room temperature up to 200 °C, respectively, whereas Py‐DBA‐COF1 loses the same weight of ≈5 % at the same conditions . The calculated surface area displays a large deviation from the experimental measurement.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, a series of boron‐based COFs with 2D and 3D architectures, namely DBA‐COF series, were synthesized from the reaction between the monomers of DBA[12]/DBA[18] (DBA=π‐conjugated dehydro‐benzoannulene) and boronic‐group‐containing linkers under similar reaction conditions . In order to reduce the differences introduced by the different synthesis process, monomers and linkers, we chose a series of materials called DBA‐COFs as a case to quantitatively investigate the influence of impurities on gas adsorption for COFs.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Origin of the Reproduction of Different Nitrogen Uptakes in Covalent Organic Frameworks (COFs)

Guan

Wang

et al. 2019

Chemistry A European J

View full text Add to dashboard Cite

In order to quantitatively examine the activation level for covalent‐organic frameworks (COFs) on gas adsorption, the effect of impurities on nitrogen uptakes in a series of boron‐based COFs was investigated by grand canonical Monte Carlo simulation (GCMC), based on accurate force fields derived from high‐level B2PLYP‐D3/def2‐TZVPP calculation. The conformations and the type of impurities were found to have little effect on the gas uptakes, but the quantity of impurities plays a crucial role on N2 loadings. More important, the terms of “activation mass ratio” and “activation volume ratio” were defined to estimate the realistic pore volume ratio for DBA‐COFs (DBA=π‐conjugated dehydro‐benzoannulene), and predict the potential of gas uptakes in DBA‐COFs. Our approach for DBA‐COFs materials could also be adopted for high‐throughput screening of a much vaster number of porous materials, to evaluate their impurities content and predict their adsorption potential.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Origin of the Reproduction of Different Nitrogen Uptakes in Covalent Organic Frameworks (COFs)

Guan

Wang

et al. 2019

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…[163] Derartige 2D-COFs kçnnten beispiellose Eigenschaften fürG asspeicherung und Gasteinschluss aufweisen. [169] Mehrere unterschiedliche Porenkanäle konnten auch durch den Einbau von formgetreuen Makrozyklen als Bausteine erreicht werden, [170,171] wobei die erste Pore intrinsisch durch den Makrozyklus und die zweite durch die Polymerisation erzeugt wird. Die Einführung von sterisch anspruchsvollen Substitutenten kann jedoch zu einem Vermeiden von kleineren Poren und damit zu einem Wechsel der COF-Topologie führen.…”

Section: Selbstsortierung Von Mehr-komponenten-mischungenunclassified

Kovalente organische Netzwerke und Käfigverbindungen: Design und Anwendungen von polymeren und diskreten organischen Gerüsten

Beuerle

Gole

2018

Angewandte Chemie

View full text Add to dashboard Cite

Poröse organische Materialien sind eine aufstrebende Klasse funktionaler Nanostrukturen mit beispiellosen Eigenschaften. Die dynamisch‐kovalente Organisation kleiner organischer Bausteine unter thermodynamischer Kontrolle wird dabei für die verblüffend einfache Bildung komplexer Architekturen in Eintopfreaktionen genutzt. In diesem Aufsatz werden die grundlegenden Designprinzipien analysiert, die zur Bildung von entweder kovalenten organischen Netzwerken als kristalline poröse Polymere oder kovalenten organischen Käfigverbindungen als formgetreue molekulare Objekte führen. Konventionelle Synthesevorschriften und Analysemethoden werden neben ausgefeilteren Strategien, wie postsynthetische Modifizierungen oder Selbstsortierung, diskutiert. Gegebenenfalls werden die entsprechenden Eigenschaften und Besonderheiten von polymeren Netzwerken und diskreten organischen Käfigen verglichen. Darüber hinaus wird das Potenzial dieser Materialien für Anwendungen, von der Gasspeicherung über die Katalyse bis hin zur organischen Elektronik, erörtert.

show abstract

“…In another study, three versions of COFs containing distribution of π-conjugated dehydrobenzoannulene (DBA) on vertices were reported involving different ratios of C 3 / C 2 -symmetric DBA catechol and pyrene-2,7-diboronic acid (PDBA) to produce three samples namely -Py-DBA-COF 1 , Py-DBA-COF 2 , and Py-MV-DBA-COF with luminescent properties [14]. Even two different pores bearing CFOs were reported through condensation reactions of two D 2h symmetrical building blocks exhibiting good adsorption capacities for CO 2 and H 2 [13].…”

Section: Introductionmentioning

confidence: 99%

“…In continuation, a porous (SA BET = 5083m 2 /g) 3D COF was synthesized with a record low density (0.13g/cm 3 ) containing π-electron conjugated dehydrobenzoannulene [14](DBA) units in which metalation of DBA-3D-COF 1 with Ni to produce Ni-DBA-3D-COF resulting in a minimal reduction in surface area (SA BET = 4763m 2 /g) due to metal incorporation within DBA cavity, and retention of crystallinity besides displaying higher uptake capacities for ethane and ethylene gas [15].…”

Section: Introductionmentioning

confidence: 99%

Engineered 2D Polymers: Current Status and Future Trend

Ahmad¹

2017

MOJPS

View full text Add to dashboard Cite

Extending the concept of synthesizing 2 d polymer sheets has been explored in this mini review to highlight about the future potentials inherent with this important class of engineered materials. The discovery of graphene (i.e. mechanically and chemically robust highly crystalline nano sheets with extremely high charge carrier mobility) not only dispelled the thermodynamic instability of 2D materials but also established it as a material for ultrafast, and low power nanoelectronic devices besides motivating to look for other 2D materials to get rid of the zero band gap limitation of graphene causing poor 'on/off ' ratio for switching applications. IntroductionIn this search for the alternatives, surface-mediated growth of molecular assemblies on metal substrates using planar aromatic molecular building blocks was considered with conjugated backbones that were suitable for directional inter-molecular coupling leading to 1/2-D covalent and no covalent assemblies with precursor dependent forms and functions where relative strength and directionality of the intermolecular interactions were found to control the resultant molecular architectures facilitated by host-guest-networks, or growth templates.These nanostructures could be made to possess high charge carrier mobilities due to strong intermolecular coupling during their on-surface polymerization resulting in surface-confined 2D nanosheets. In this context, the organic macromolecules with programmable structure, composition, and functionalities became handy for their uses in (opto) electronic devices. Additionally, designing atomically precise pores would make them useful in membranes or sensors as shown in poly (paraphenylene) or graphene [1] nano ribbons. However, it would be essential to improve the quality of highly defective 2DPs that were synthesized initially lacking long-range orders by initiating polymerization on metal surfaces as template, wherefore different substrate materials, coupling reactions, and reaction parameters are possible to control the quality covalent networks better [2].Compared to a linear chain of polymer with each monomer linked to two neighbors in 1D-architecture, a two-dimensional polymer sheet (2DPS) contains covalently bonded molecular building blocks extending in 2D [3,4]. Preparation of mono/fewlayer of materials from natural and synthetic lamellar crystals exfoliated into nanosheets (as in case of graphene) is known to face problems in their synthesis, and production although characteristic (opto) electronic properties of their mono/few layered structures have been found possessing novel applications. Given the progress made in synthesizing these engineered 2DP sheets from available starting materials, the future prospects appear bright once larger sheets are produced with added functionalities incorporated on one/both sides. Enlarging the types of monomers involved in preparing 2DP sheets through different polymerization routes would certainly broaden the range of resultant engineered materials. Having overcome the c...

show abstract

Luminescent Covalent Organic Frameworks Containing a Homogeneous and Heterogeneous Distribution of Dehydrobenzoannulene Vertex Units

Cited by 184 publications

References 31 publications

The Origin of the Reproduction of Different Nitrogen Uptakes in Covalent Organic Frameworks (COFs)

The Origin of the Reproduction of Different Nitrogen Uptakes in Covalent Organic Frameworks (COFs)

Kovalente organische Netzwerke und Käfigverbindungen: Design und Anwendungen von polymeren und diskreten organischen Gerüsten

Engineered 2D Polymers: Current Status and Future Trend

Contact Info

Product

Resources

About