Synthesis and characterization of highly porous borazine-linked polymers and their performance in hydrogen storage application

Reich, Thomas E.; Jackson, Karl T.; Li, Sa; Jena, P.; El‐Kaderi, Hani M.

doi:10.1039/c1jm11455g

Cited by 60 publications

(52 citation statements)

References 37 publications

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“…A Bruker 4 mm MAS probe was used to acquire 13 C CP/MAS NMR spectra at 7.5 kHz spinning. The chemical shifts were externally referenced to adamantane for 13 C. The gravimetric weight loss and melting point were analyzed by a TA 45 Instrument's SDT-Q600, and the data was analyzed with a TA Universal Analysis 2000 software. All low pressure (P ≤ 1atm) adsorption and desorption isotherms of hydrogen, nitrogen and CO 2 were measured by a Quantachrome AS1C.…”

Section: Characterizationmentioning

confidence: 99%

“…Considering CCS technology, porous solid sorbents have the potential to lower the energy penalty of the alkanoalamine based carbon capture process since these materials can be regenerated simply by the pressure swing adsorption and do not require high temperatures (100-140 °C for 40 alkanoalamines 4 ) for regeneration. 5 On the other hand, porous solid sorbents should have considerable CO 2 capacity (3 mmol/g) at flue gas exhaust temperature and pressure (50-75 °C at 1 bar) in the presence of water and other acidic impurities as well as high selectivity towards CO 2 to be a viable alternative to 45 alkanoalamines. 4,21,22 Furthermore, an ideal hydrogen storage material should have high gravimetric (55 g H 2 /kg system) and volumetric density (40 g H 2 /L system ) near ambient temperature.…”

Section: Introductionmentioning

confidence: 99%

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A novel nitrogen rich porous aromatic framework for hydrogen and carbon dioxide storage

et al. 2013

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Section: Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A novel nitrogen rich porous aromatic framework for hydrogen and carbon dioxide storage

et al. 2013

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“…This value is higher than those of reported COFs and only exceeded by the uptake of COF-6 which has much narrower channels (9 Å). Other boron-containing porous materials should include the borazine-linked polymers (BLPs), which is prepared by the thermal decomposition of arylamine-borane or arylamine-boron trihalide adducts in aprotic solvents [52][53][54][55]. The borazine ring in these materials is structurally analogous to the boroxine building units found in COFs.…”

Section: Covalent Organic Frameworkmentioning

confidence: 99%

Microporous Organic Polymers for Carbon Dioxide Capture

Luo

Tan

2014

Green Chemistry and Sustainable Technology

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Microporous organic polymers (MOPs) are a unique class of porous materials consisting solely of the light elements (C, H, O, N, etc.). A series of vivid characteristics of MOPs, such as high-specific surface area, good physicochemical stability, diverse pore dimensions, topologies, and chemical functionalities, make them suitable adsorbents for CO 2 capture. In this chapter, MOPs are categorized into four classes according to the types of organic reactions and the chemical structures of the resulting materials: hypercrosslinked polymers (HCPs), covalent organic frameworks (COFs), polymers of intrinsic microporosity (PIMs), and conjugated microporous polymers (CMPs). For each type of the polymer network, the state-of-the-art development in the design, synthesis, characterization, and the CO 2 sorption performance is reviewed. Strategies for controlling CO 2 uptake capacity and adsorption enthalpy via manipulation of surface area, pore size, and functionality are discussed in detail. These studies would open up many new possibilities for the development of the novel solid sorbents targeting the CO 2 capture process. It is expected that this chapter will not only summarize the main research activities in this field, but also find possible links between basic studies and practical applications. Abbreviations ACMPAcetylene gas mediated conjugated microporous polymers BA Benzyl alcohol BC Benzyl chloride BCMA 9,10-Bis(chloromethyl)anthracene

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“…Important examples include graphenes [33][34][35] and polymers. [36][37][38][39][40] On the other hand, the use of the boroxadizine ring to dope PAHs remains elusive to the bestofo ur knowledge.…”

Section: Introductionmentioning

confidence: 99%

Boron–Nitrogen‐Doped Nanographenes: A Synthetic Tale from Borazine Precursors

Dosso

Battisti

Ward

et al. 2020

Chemistry A European J

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In this work, ac omprehensive account of the authors' synthetic efforts to prepareb orazino-doped hexabenzocoronenes by using the Friedel-Crafts-type electrophilic aromatic substitution is reported. Hexafluoro-functionalized aryl borazines, bearing an ortho fluoride leaving group on each of the N-and B-aryl rings,w as shown to lead to cascade-type electrophilica romatic substitution events in the stepwise CÀCbond formation, giving higher yields of borazinocoronenes than those obtained with borazine precursors bearing fluoride leavingg roups at the ortho positions of the B-aryl substituents. By using this pathway,a nu nprecedented boroxadizine-doped PAHf eaturing ag ulf-type periphery could be isolated,a nd itss tructure proven by single-crystal X-ray diffraction analysis. Mechanistic studies on the stepwise Friedel-Crafts-type cyclization suggestt hat the mechanism of the planarizationr eactionp roceeds through extension of the p system. To appraise the doping effect of the boroxadizine unit on the optoelectronic properties of topology-equivalent molecular graphenes, the all-carbon and pyrylium PAHa nalogues, all featuring ag ulf-type periphery, were also prepared. As already shown for the borazinodoped hexabenzocoronene, the replacement of the central benzene ring by its B 3 N 2 Oc ongener widens the HOMO-LUMO gap and dramaticallye nhances the fluorescence quantum yield.[a] J. Scheme1.Synthetic planarizationp rotocols for preparing borazino-doped hexabenzocoronenes 1 and 2.Figure 7. ESP surfaces mapped on the vdW surface up to an electrondensity of 0.05 electronbohr À3 for a) 11 and b) 18.Side (up) and top (bottom) view of the packingo fc )11 and d) 18.Atom colors:pink B, blue N, red O, gray C. Spacegroups: P2 1 /c and P1.

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Synthesis and characterization of highly porous borazine-linked polymers and their performance in hydrogen storage application

Cited by 60 publications

References 37 publications

A novel nitrogen rich porous aromatic framework for hydrogen and carbon dioxide storage

A novel nitrogen rich porous aromatic framework for hydrogen and carbon dioxide storage

Microporous Organic Polymers for Carbon Dioxide Capture

Boron–Nitrogen‐Doped Nanographenes: A Synthetic Tale from Borazine Precursors

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