Nanoporous materials are omnipresent in our daily lives – in air purifiers, water dispensers, catalytic converters, chemical industries, plant matter, and anywhere filtration is needed. In addition to naturally existing structures like zeolites and diatomites, many artificial nanoporous materials such as activated carbons, molecular sieves and silica gel have found great use in a wide variety of applications. More recently, new nanoporous materials such as metal–organic frameworks (MOFs) are being developed, having phenomenal structural diversity and exceptional promise in emerging applications where porosity tuning and precision positioning of functionalities are essential properties. These new advances have brought considerable interest in nanoscale pore engineering and material design, with the hopes that the new structures will play a pivotal role in solving critical issues such as combating global warming, building effective catalysts and providing energy efficient, target compound capture and decontamination.
In this issue, we invite contributions on novel concepts, ingenious designs and promising applications related to nanoporous materials, such as MOFs, covalent organic frameworks (COFs), zeolites, activated carbons, porous polymers, molecular sieves, mesoporous metals and oxides. The submitted works are expected to feature, but are not limited to, the following topics:
Figure 1: a) Zr-oxo cluster (green) and organic ligand CPCDC (9-(4-carboxyphenyl)-9H-carbazole-3,6-dicarboxyl...
Figure 2: Nitrogen adsorption isotherms at 77 K (a,d) and SEM images (scale bars 1 µm) (b,c) of DUT-98(1) bef...
Figure 3: a–d) SEM images and e–h) nitrogen adsorption–desorption isotherms at 77 K for samples DUT-98(1) (a,...
Figure 4: Powder XRD patterns of DUT-98 with varying crystal size a) as-synthesized and b) activated by super...
Figure 5: Water physisorption experiments at 298 K on: a) DUT-98(1)–(4) and c) DUT-98(3) after cycling and af...
Figure 1: Schematic illustration of processible COP-100 in EDA to form either nanoparticles (COP-100-NP) or f...
Figure 2: (a) Low solubility of COP-100 in polar aprotic solvents. (b) Instant color change of COP-100 by the...
Figure 3: Effect of amine equivalence in solubilizing COP-100. (a) COP-100 dissolved in 8 equivalent EDA whic...
Figure 4: FTIR spectra of COP-100, COP-100-Film, and COP-100-Precip. COP-100 exhibited two peaks at 3400 cm−1...
Figure 5: (a) Structure of COP-600 synthesized by Knoevenagel-like condensation. Solubility of COP-600 in EDA...
Figure 6: (a) Gravimetric CO2 adsorption isotherm of COP-100 and COP-100-Film at 40 °C. (b) Thermogravimetric...
Scheme 1: Synthesis of MFU-4.
Figure 1: Thermogravimetric analysis of MFU-4 before (black) and after (Sample 3a, blue) the loading of SF6 m...
Figure 2: FTIR spectra of MFU-4 before (black) and after (Sample 3a, blue) the loading of SF6. Bands attribut...
Figure 3: Powder X-ray diffraction analysis of MFU-4 before (black) and after (Sample 3a, blue) the loading o...
Figure 4: 19F MAS NMR spectrum of MFU-4 (Sample 3b) loaded with SF6 recorded at room temperature. The spectru...
Figure 5: (a) MFU-4 unit cell showing the linear transition scan path for SF6 crossing a single small pore. (...
Figure 6: Thermogravimetric analysis of MFU-4 loaded with SF6 (Sample 3a) after 0, 1, 3, 7, 14, and 60 days m...
Figure 7: FTIR spectra of MFU-4 loaded with SF6 (Sample 3a) after 0, 1, 3, 7, 14, and 60 days. Bands attribut...
Figure 1: Schematic representation of the encapsulation of the electron-acceptor (A) C60 in the electron-dono...
Figure 2: Powder X-ray diffraction (PXRD) patterns of simulated and experimental desolvated MUV-2 and C60@MUV...
Figure 3: a) Raman spectra of C60, MUV-2 and C60@MUV-2. b) Solid-state UV–vis spectra of MUV-2 and C60@MUV-2....
Figure 4: a) Nitrogen adsorption isotherms at 77 K and b) high-pressure CO2 adsorption isotherms at 298 K, on ...
Figure 5: a) Minimum-energy crystal structure calculated for conformations A and B of host–guest C60@MUV-2 at...
Figure 6: a) Projected density of states (PDoS) for the host–guest C60@MUV-2 system, with contributions from ...
Figure 7: Electron density difference between host–guest C60@MUV-2 and the constituting moieties (C60 + MUV-2...
Figure 8: a) TDDFT absorption spectra calculated at the CAM-B3LYP/6-31G** level for host–guest C60@TTFTB (inc...
Figure 9: Current (I)–Voltage (V) plot for pressed pellets of MUV-2 (black) and C60@MUV-2 (red) at 300 K.
Figure 1: SEM images of microporous MP-SAPO-5 (A) and hierarchical HP-SAPO-5 (B).
Figure 2: Nitrogen physisorption isotherms of gold-deposited microporous (A) and hierarchical (B) SAPO-5 syst...
Figure 3: The magnitude and imaginary component of the k3-weighted Fourier transform for the XAS data of the ...
Figure 4: Stacked XPS data for Au-doped microporous MP-SAPO-5 (A) and hierarchical HP-SAPO-5 (B) showing the ...
Figure 1: A) Synthesis scheme of M-CAT-1 using 2,3,6,7,10,11-hexahydroxytriphenylene (HHTP) and the respectiv...
Figure 2: A) A scheme of the vapor-assisted conversion (VAC) set up and the resulting nanostructured films. B...
Figure 3: Cross-section SEM micrographs of A) an oriented and compact Co-CAT-1 film and B) an oriented (pilla...
Figure 4: Box and whisker plot of the measured underwater OCAs for the nanostructured Ni-CAT-1 and Co-CAT-1 f...
Figure 5: A) A 30° tilted SEM top view micrograph of Ni-CAT-1 film grown on glass. B) WCA on the superhydroph...
Figure 1: One of the polymorphs of the microporous ETS-10 consisting of TiO6 octahedra and SiO4 tetrahedra sh...
Figure 2: X-ray diffractograms of the as-synthesized ETS-10 material (Na,K-ETS-10, top) and of the reference ...
Figure 3: SEM micrographs of selected crystals representing different types of phases formed during the synth...
Figure 4: Nitrogen adsorption (solid circles) and desorption (open circles) isotherms of the as-synthesized N...
Figure 5: Hg intrusion data of the as-synthesized Na,K-ETS-10 material.
Figure 6: TEM micrographs for the Na,K-ETS-10 material obtained with different magnifications demonstrating a...
Figure 7: (A) XRD data of post-synthetically treated titanosilicates. The calculated crystallinity decreased ...
Figure 8: SEM micrographs of the titanosilicates treated with H2O2 for 30, 45 and 60 min (P-ETS-10/30, P-ETS-...
Figure 9: (A) Nitrogen adsorption and desorption isotherms of titanosilicates treated with H2O2 for 30 min (l...
Figure 10: TEM images of the selected crystals of P-ETS-10/60 and C-P-ETS 10/60 demonstrating the presence of ...
Figure 11: Differential thermal analysis of the Na,K-ETS-10 (red), P-ETS-10/60 (blue) and C-P-ETS-10/60 (green...
Figure 12: Temperature-programmed desorption of NH3 (A) and CO2 (B) in Na,K-ETS-10 (red), P-ETS-10/60 (blue) a...
Figure 13: The HPDEC (A) and CP (B) 29Si MAS NMR spectra obtained for Na,K-ETS-10 (red), P-ETS-10/60 (blue) an...
Figure 14: The EPR spectra measured with Na,K-ETS-10 (red), P-ETS-10/60 (blue) and C-P-ETS-10/60 (green) at 70...
Figure 15: Variable temperature HP 129Xe NMR spectra acquired on Na,K-ETS-10 (A, red), P-ETS-10/60 (B, blue) a...
Figure 16: 1H PFG NMR diffusion attenuation curves of bulk triolein (dashed line) and triolein in oversaturate...
Figure 17: Schematic representation of the diffusion modes denoted as 1, 2 and 3 in the Figure 16 as observed by PFG NM...
Figure 18: Conversion of triolein over CaO- (A) and ETS-10-based (B) catalysts at 403 K measured for different...
Figure 1: Relative change in electrical resistance measured in situ during the exposure of npAu in 20 mM cyst...
Figure 2: Cyclic voltammetry of sample A. (a) Measurement of the cysteine-free npAu between 600 and −900 mV, ...
Figure 3: Cyclic voltammetry of sample B modified with cysteine (a) and concomitantly measured change in rela...
Scheme 1: Detoxification routes of sulfur mustard gas: hydrolysis (green); oxidation to sulfoxide (blue) and ...
Figure 1: NU-400 constituents: a) the pyrene-based linker, pyrene-2,7-dicarboxylic acid and b) Zr6 metal node...
Figure 2: Conversion of CEES to CEESO under different conditions: (a) reaction scheme; (b) in the presence of...
Figure 3: Selective oxidation of CEES to CEESO using 1 mol % catalyst of NU-400 (black) versus NU-1000 (purpl...
Figure 4: The reusability of the catalyst NU-400 MOF over four successive injections of CEES (0.2 mmol) into ...
Figure 1: (a) N2 adsorption isotherms and (b) pore size distribution of PDC materials and activated carbon (A...
Figure 2: Amount of adsorbed (a) H2O and (b) n-octane over PDC materials. (c) Ratios of adsorbed amounts of n...
Figure 3: Adsorbed quantities of acid red 1 (AR1) over AC, KOH-600, KOH-700, KOH-750, KOH-800 and KOH-900 bas...
Figure 4: Adsorbed quantities of acid red 1 (AR1), methyl orange (MO), methylene blue (MB) and Janus green B ...
Figure 5: Effect of contact time on (a) AR1 and (b) JGB adsorption over AC and KOH-900.
Figure 6: (a) Adsorption isotherms and (b) Langmuir plots for the adsorption of AR1 from water over AC and KO...
Figure 7: Effect of pH on the adsorbed amounts of AR1 and JGB over KOH-900.
Figure 1: (Left) Schematic diagram of the mechanism of semiconducting catalyst-mediated photocatalytic hydrog...
Figure 2: Structures of triazine-based conjugated polymers.
Figure 3: Proposed model fragments and electron density differences of M1–M3 in P8. Adapted with permission f...
Figure 4: Schematic representation of structures of pyridine-contained conjugated polymers.
Figure 5: Schematic representation of structures of benzothiadiazole-based conjugated polymers.
Figure 6: The mechanism of PCET-enhanced H2 formation; see [66].
Figure 7: (a) Proposed reaction pathway for H2 evolution (single-site reaction) on the halogen-substituted ca...
Figure 8: Schematic representation of structures of dibenzothiophene-S,S-dioxide-based CPs.
Figure 9: Schematic representation of structures of cyano-based CPs.
Figure 10: Schematic representation of structures of CPs for heterojunctions.