Interest in mesoporous materials (IUPAC definition: pore size 2–50 nm) has developed dramatically over the last few years, not least because the pore structure of these materials provides an extremely large surface area within a relatively small volume of material. This makes the materials suitable, for example, for catalysis, chemical sensors, and molecular separation.
The following is a selection of recent articles in this field from Angewandte Chemie, Chemistry—A European Journal, Advanced Materials, Advanced Functional Materials, and the European Journal of Inorganic Chemistry.
Back and forth: Alcohol dehydrogenase (ADH) from Escherichia coli was electrostatically immobilized onto the surface of aminopropyl modified mesoporous cellular siliceous foams (MCF-NH2) to enable its use as a cofactor recycling system in the reversible conversion of 2-propanol into acetone. Several pH values for the immobilization were examined along with the MCF-NH2 amount. The ADH uptakes, long-term stabilities, and leaching behavior as well as the Michaelis-Menten kinetics were monitored.
Michael Dreifke, Felix J. Brieler, Michael Fröba
ChemCatChem, February 21, 2017, DOI: 10.1002/cctc.201601288. Read article
Out of the box: Dual-responsive hybrid microcontainers with two payloads in separate storage spaces—Nile red in the mesopores of silica nanoparticles and 5(6)-carboxyfluorescein diacetate (CFDA) in the hollow core of the microcapsules—were prepared by the straightforward UV-initiated polymerization of Pickering emulsions. The release of Nile red and CFDA could be selectively activated by changing the temperature or pH value (see picture).
Ying Cong, Qiuju Li, Min Chen, Limin Wu
Angew. Chem. Int. Ed., February 21, 2017, DOI: 10.1002/anie.201612291. Read article
To dye for: A 3D metal–organic framework constructed from an anthracene derivative was employed as an efficient sensitizer for anatase TiO2. The co-catalyst was prepared by mechanical mixing, which should be regarded as the simplest synthetic strategy in materials science. The co-catalyst can efficiently photo-eliminate organic dyes under visible light irradiation. Photodegradation experiments were carried out to study the possible mechanism.
Ming-Hua Xie, Rong Shao, Xin-Guo Xi, Gui-Hua Hou, Rong-Feng Guan, Peng-Yu Dong, Qin-Fang Zhang, Xiu-Li Yang
Chem. Eur. J., February 20, 2017, DOI: 10.1002/chem.201605282. Read article
The window size to success: Phosphotungstic acid (PTA) encapsulated in mesoporous MIL-100(Fe), which has a larger window size than UiO-66 and ZIF-8, exhibits an efficient desulfurization performance for gasoline because of the confinement of the PTA in the pores of the metal–organic framework. This ensures the accessibility of all the organic sulfurs into the confined active sites in the pores.
Xu-Sheng Wang, Lan Li, Jun Liang, Yuan-Biao Huang, Rong Cao
ChemCatChem, February 14, 2017, DOI: 10.1002/cctc.201601450. Read article
Resisting the structural collapse: Mesostructured superbasic sites were generated by employing the formation of La2O3–SBA-15-supported KF through thermal treatment at a low activation temperature of 350 °C under air atmosphere.
Ning Liu, Zhimin Wu, Meng Li, Shanshan Li, Zhantao Luo, Yongfei Li, Langsheng Pan, Yuejin Liu
ChemCatChem, February 08, 2017, DOI: 10.1002/cctc.201601246. Read article
Feel the heat! Mesoporous carbon nitrides (MCNs) with rod-shaped morphology and tunable nitrogen contents have been synthesized through a calcination-free method by using ethanol-washed mesoporous SBA-15 as a template at different carbonization temperatures (see figure). Temperature is an effective tool to tune the nitrogen content and CO2 adsorption capacity of mesoporous carbon nitride.
Kripal S. Lakhi, Dae-Hwan Park, Stalin Joseph, Siddulu N. Talapaneni, Ugo Ravon, Khalid Al-Bahily, Ajayan Vinu
Chem. Asian J., February 08, 2017, DOI: 10.1002/asia.201601707. Read article
A stable MOF: The metal–organic framework MIL-100(Cr) is presented as a promising new heterogeneous catalyst with high activity, selectivity and reusability in the solvent-free synthesis of styrene carbonate from CO2 at mild conditions. Two strategies to increase the reusability of the MOF catalysts are proposed.
Masoumeh Taherimehr, Ben Van de Voorde, Lik H. Wee, Johan A. Martens, Dirk E. De Vos, Paolo P. Pescarmona
ChemSusChem, February 06, 2017, DOI: 10.1002/cssc.201601768. Read article
Material changes: Zeolite ZSM-5 can be modified to improve the potential as a heterogeneous catalyst for the conversion of biomass-derived compounds. Solid acid catalysts possessing MFI topology and different crystal sizes and porosities were explored for the conversion of α-angelica lactone (AnL) and 5-(hydroxymethyl)furfural (HMF), in 1-butanol at T=120–170 °C, to give levulinate esters (LE) and furanic ethers.
Margarida M. Antunes, Sérgio Lima, Auguste Fernandes, Ana L. Magalhães, Patrícia Neves, Carlos M. Silva, Maria F. Ribeiro, David Chadwick, Klaus Hellgardt, Martyn Pillinger, Anabela A. Valente
ChemCatChem, February 06, 2017, DOI: 10.1002/cctc.201601236. Read article
Iodine can′t get away! Three supramolecular isomers of coordination polymers with the same framework formula and different architectures have been synthesized by using a PEG-induced approach. The dynamic processes of iodine capture and structure–property relationship in these crystal materials have been investigated.
Si-Si Zhao, Li Chen, Xiaohua Zheng, Lei Wang, Zhigang Xie
Chem. Asian J., February 03, 2017, DOI: 10.1002/asia.201700018. Read article
A new strategy for the fabrication of hierarchically structured composites as highly effective and stable electrocatalysts is proposed. The oxidation, sulfurization, carbonization, and phosphorization of premade cobalt carbonate hydroxide@zeolitic-imidazolate-framework-67 (CCH@ZIF-67) produced Co3O4@X (X = Co3O4, CoS, C, and CoP) derivatives, respectively, which as electrocatalysts exhibit excellent performance in the oxygen evolution reaction with low overpotential and high stability.
Jian Zhou, Yibo Dou, Awu Zhou, Rui-Mei Guo, Min-Jian Zhao, Jian-Rong Li
Adv. Energy Mater., February 02, 2017, DOI: 10.1002/aenm.201602643. Read article
In good shape: Periodic mesoporous organosilica (PMO) nanoparticles have been synthesized with tunable morphologies ranging from nanospheres to nanowires via the addition of organic co-solvent(s) to the aqueous template (see figure). The morphology strongly influences the properties and in vitro toxicities of these nanoparticles.
Yevhen Fatieiev, Jonas G. Croissant, Kholod Alamoudi, Niveen M. Khashab
ChemPlusChem, January 31, 2017, DOI: 10.1002/cplu.201600560. Read article
Behind the sheets: Carbonyl-grafted g-C3N4 porous nanosheets (COCNPNS) were fabricated by a two-step thermal process using melamine and oxalic acid as starting reagents followed by thermal etching by O2 (see figure). Under visible-light illumination, the prepared COCNPNS exhibited a superior photocatalytic hydrogen evolution rate.
Feng-Yun Su, Wei-De Zhang
Chem. Asian J., January 31, 2017, DOI: 10.1002/asia.201601518. Read article
A novel hollow and porous NiCo2O4 nanowall array on carbon cloth is fabricated and utilized as an efficient electrode for flexible supercapacitor and oxygen evolution reaction catalysis.
Cao Guan, Ximeng Liu, Weina Ren, Xin Li, Chuanwei Cheng, John Wang
Adv. Energy Mater., January 25, 2017, DOI: 10.1002/aenm.201602391. Read article
Metal–organic framework derived cobalt phosphide nanoparticles encapsulated B/N co-doped graphene nanotubes are fabricated through pyrolysis and phosphidation, which exhibit excellent electrocatalytic activity for hydrogen evolution reaction.
Hassina Tabassum, Wenhan Guo, Wei Meng, Asif Mahmood, Ruo Zhao, Qingfei Wang, Ruqiang Zou
Adv. Energy Mater., January 25, 2017, DOI: 10.1002/aenm.201601671. Read article
All in one: We report the feasibility of the catalysis of contrasting reactions, oxidation and reduction, in a multistep process that also involves a condensation reaction, all performed with hybrids of catalytic organometallic complexes entrapped within metals ([complex]@metal). Two routes are explored for the multistep process: the combination of an oxidizing Ir complex entrapped in Ag ([Ir]@Ag) and a reducing Rh complex entrapped in Ag ([Rh]@Ag), and [Ir]@Pd, in which [Ir] acts as the oxidizing catalyst, and the Pd was the reducing catalyst.
Leora Shapiro, David Avnir
ChemCatChem, January 18, 2017, DOI: 10.1002/cctc.201601386. Read article
The use of mesoporous silica as a matrix for the formation of nanoparticles of magnetic and photomagnetic coordination compounds enables the study of the properties of the compounds at the nanoscale owing to the versatility of the synthetic pathway.
Robinson Moulin, Emilie Delahaye, Amélie Bordage, Emiliano Fonda, Jean-Pierre Baltaze, Patricia Beaunier, Eric Rivière, Giulia Fornasieri, Anne Bleuzen
Eur. J. Inorg. Chem., January 17, 2017, DOI: 10.1002/ejic.201601196. Read article
A continuous carbon nitride polyhedron assembly is developed using a facile pyrolysis method and is further constructed into a flexible supercapacitor with a highly ion-conductive interpenetrating polymer network electrolyte. The high energy capacity of the device along with excellent flexibility demonstrates advancement of the novel assembly strategy, providing new insight into rational design of electrode materials for long-lived flexible energy storage devices.
Chao Lu, Dongxing Wang, Jingjing Zhao, Song Han, Wei Chen
Adv. Funct. Mater., January 16, 2017, DOI: 10.1002/adfm.201606219. Read article
High-density storage of solar energy or waste heat is offered by a microporous aluminophosphate. Storage is based on sorption of water within the material's pores and is not prone to thermal losses. The aluminophosphate withstands repeated adsorption and desorption without degradation. It is convenient for seasonal energy storage or for the enhancement of the heat-pump performance.
Andraž Krajnc, Jure Varlec, Matjaž Mazaj, Alenka Ristić, Nataša Zabukovec Logar, Gregor Mali
Adv. Energy Mater., January 09, 2017, DOI: 10.1002/aenm.201601815. Read article
Two in one: Three MOFs have been synthesized from the same bifunctional pyrazoyl–carboxyl ligand. Complexes 1 (see figure) and 3 contain dinuclear clusters and reveal a gis zeolite 3D net and a 2D structure, respectively. Complex 3 shows red luminescence as a result of energy transfer from the organic ligand to the EuIII ion. Complex 2 reveals a rare (3,8)-connected tfz-d; UO3 net with an unusual Mn4(COO)6 cluster and shows antiferromagnetic properties.
Gao-Peng Li, Hong-Yun Yang, Yong-Zhi Li, Lei Hou, Bin Liu, Yao-Yu Wang
ChemPlusChem, November 29, 2016, DOI: 10.1002/cplu.201600521. Read article
Enzymatic fuel cells: Nanoporous gold (NPG) electrodes with tunable pore size from 5 to 60 nm were prepared and utilized for the immobilization of bilirubin oxidase (BOx) and glucose dehydrogenase (GDH) for use in biofuel cells. The devices with NPG-confined enzymes show high power outputs and enhanced long-term operation and storage stability, an improvement associated with the physical confinement of the enzyme within the porous network (see figure).
Till Siepenkoetter, Urszula Salaj-Kosla, Xinxin Xiao, Peter Ó Conghaile, Marcos Pita, Roland Ludwig, Edmond Magner
ChemPlusChem, November 25, 2016, DOI: 10.1002/cplu.201600455. Read article
Functional cations: A new two-dimensional Cu perovskite containing an optoelectronically active organic cation (orange in the figure) has been synthesized using second-sphere coordination interactions. The material shows near-UV/blue photoluminescence and is stable for months under ambient conditions.
Daniele Cortecchia, Cesare Soci, Massimo Cametti, Annamaria Petrozza, Javier Martí-Rujas
ChemPlusChem, November 10, 2016, DOI: 10.1002/cplu.201600477. Read article
Crystalline, highly oriented Metal-organic framework (MOF) thin films suggest intriguing possibilities as gas separator, catalysis, proton conduction, photovoltaic device and so on. The current review illustrates some fabrication methods and brings some updated applications of oriented MOF thin films. It is understatement to predict that the highly ordered MOF films will have a promising future for the MOF-based devices.
Zhihua Fu, Gang Xu
Chem. Rec., October 24, 2016, DOI: 10.1002/tcr.201600109. Read article