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Highlights • The meaning and significance of the removal of pollutants from wastewater are illustrated. • Representative studies about MOFs for the removal of contaminants from wastewater are illustrated. • Perspectives and challenges about the removal of pollutions from wastewater by MOFs are presented. Abstract Water pollution is one of the most serious worldwide problems that endangers the survival and development of human society. Therefore, the effective and efficient removal of contaminants from water has become a hot topic. As a fast-growing branch of coordination chemistry, metal–organic frameworks (MOFs) with tailorable porous structures and numerous active sites have proved to be ideal adsorbents or photocatalysts for water purification. In this review, recent advances in the removal and degradation of water pollutants by MOFs are highlighted. In addition, the challenges and prospects in this active field are also briefly discussed. [ABSTRACT FROM AUTHOR]

[Display omitted] • Low-power non-coherent light-triggered two-photon absorption process with long-lived transition state: consecutive photo-induced electron transfer and triplet triplet annihilation upconversion. • Supramolecular approaches to extending the lifetime of radical anion or triplet state of dye molecules. • Applications in photoredox catalysis, 3D printing, cancer treatment and bioimaging. • The challenges and future directions are proposed. Materials with multi-photon absorption (MPA) feature, are highly desirable for applications such as deep-seated tumor treatment, high spatiotemporal resolution bioimaging, sophisticated micro-nano fabrication, optical data storage, frequency-upconverting laser, and optical limiting. The classical two-photon absorption (TPA) process relies on an extremely short-lived virtue state, leading to the requirement of an ultrahigh power density of femtosecond pulsed laser. To break this application barrier, the key solution is to extending the lifetime of the transition state in TPA. Recently, the operation of TPA with low-power non-coherent excitation (LPNC-TPA) was achieved by leveraging the mono-reduced species (such as radical anion) and the triplet excited state of dye molecules as the transition state with a relatively long lifetime. In this review, the mechanism of these LPNC-TPA processes will first be introduced, followed by the approaches to extend the lifetime of the mono-reduced species and the triplet state. Then, considering its ability to tune the aggregation mode of dye molecules, the metal–organic framework (MOF) will be emphasized as an efficient tool to operate efficient LPNC-TPA in the solid state. The merits and features of LPNC-TPA materials will be revealed through their emerging applications in photoredox catalysis, photopolymerization, 3D printing, in vivo cancer treatment, bioimaging, and biosensing. Finally, the future directions and challenges of LPNC-TPA are proposed, along with the possible solutions. [ABSTRACT FROM AUTHOR]

This review summarized recent research progresses on the in-situ synthesis of molecular magnetorefrigerant materials derived from organic ligands, metal ions and templates generated in-situ. • In-situ synthetic strategy for the construction of molecular magnetorefrigerant materials has been reviewed. • Molecular magnetorefrigerant materials with ligands, metal ions and templates formed in-situ have been illustrated. • The influencing factors toward magnetocaloric effect of the molecular magnetorefrigerants are detail discussed. Zero-dimensional cluster complexes and coordination polymers for magnetic refrigeration have attracted great interest in the last decade. In-situ synthesis is a widely-used method to assemble various molecular magnetorefrigerant materials derived from different types of ligands. This review focuses mainly on the synthesis, structure and magnetochemistry of molecular magnetorefrigerant materials via in-situ synthesis, with an emphasis on in-situ generation of ligands, metal ions and templates. The first section gives a brief discussion on molecular magnetorefrigerants and some important principles obtained from magneto–structural correlation. The in-situ synthetic strategy will also be referred to and elucidated in this part. The next three sections give overviews of the main results obtained by our group and other groups in recent years, which are, in-situ generated ligands, metal ions and templates in the synthesis of molecular magnetorefrigerant materials. Finally, the conclusions and perspectives of molecular magnetorefrigerant materials will be presented. Some of the trends could provide new insights for the further development of this promising area. [ABSTRACT FROM AUTHOR]

Graphical abstract Highlights • A comprehensive review of MOF-derived nanostructures as anodes in lithium and sodium ion batteries. • Detailed discussions of the effects of pyrolysis parameters on physicochemical properties of MOF derivatives. • A timely progress of lithium (or sodium) storage of MOF-derived materials was highlighted. • It provides a useful guidance on the rational preparation of MOF derivatives for better electrochemical performance. Abstract Metal–organic frameworks (MOFs), possessing the superiorities with high surface area, tunable structure, highly ordered pores and uniform metal sites, have attracted widespread attention as promising templates for deriving various nanostructured materials, such as porous carbon-based materials, metallic oxides, metallic carbides, metallic chalcogenides, metallic phosphides, and their composites. It has also been demonstrated that all these MOF-derived nanostructures deliver excellent performances for applications in electrochemical energy storage and conversion devices, especially in lithium and sodium ion batteries. During the thermal conversion process of MOF precursors, the selection of pyrolysis parameters is of vital importance for the physicochemical properties of MOF-derived products in terms of composition, morphology, particle size, BET surface area, etc. Herein, this review summarizes the influence of pyrolysis parameters such as temperature, duration time, gas atmosphere as well as heating rate on physicochemical properties of MOF derivatives, which may provide a guidance for the controllable preparation of MOF-derived nanostructures via the rational parameter modulation. In addition, the timely progress of MOF-derived nanostructures as anodes in lithium and sodium ion batteries is also highlighted, and the relationship between pyrolysis parameter and MOF-derived nanostructures as well as lithium and sodium ion batteries is summarized. [ABSTRACT FROM AUTHOR]

Graphical abstract This review firstly summarized recent research progresses on the syntheses and applications of MOF-based heterogeneous catalysts for the conversion of a selection of C1 compounds, namely CO, CO 2 and CH 4 , into value-added chemicals. Highlights • MOF-based heterogeneous catalysts for C1 chemistry are systematically reviewed. • The MOFs, MOF composites and MOF derivatives catalysts are rationally summarized. • Major challenges and perspectives toward the further exploration are presented. Abstract Catalysis of C1 chemistry, especially for carbon monoxide (CO), carbon dioxide (CO 2) and methane (CH 4), is critically important for the clean production of fuels and chemicals and future energy sustainability. However, due to the relatively inert nature and low reactivity of these C1 molecules, their activation and transformation into clean fuels and high value-added chemicals still remain formidable challenges. In this context, metal-organic frameworks (MOFs), as relatively new emerging crystalline porous materials, have been shown to be promising heterogeneous catalysts or supports/precursors in the design and synthesis of various functional nanomaterials for addressing these challenges. In this review, the recent advances in MOF-based heterogeneous catalysts for transforming CO, CO 2 and CH 4 into high value-added chemicals are systematically reviewed. Emphasis is mainly placed on the catalytic reactivity, reaction mechanism and catalyst design. Additionally, major challenges and opportunities for MOF catalysts in the conversion of C1 chemistry are discussed to outline aspects for further development in this ongoing research field. It is anticipated that this review will provide a useful guide to chemists and material scientists attempting to design better MOF-based catalysts for the chemical conversion of C1 compounds. [ABSTRACT FROM AUTHOR]

Graphical abstract Highlights • The structural diversity of CPs from conformation versatility of ligand is reviewed. • The applications of CPs due to the change of ligand conformations are demonstrated. • Prospect of CPs making use of the versatility of ligand conformations is suggested. Abstract Coordination polymers (CPs, including metal–organic frameworks, MOFs) have become an active topic in chemical and materials science. The construction of CPs depends heavily on the organic ligands as well as the metal centers, and the versatility of ligands contributes to the structural and property diversities of CPs. Here, the structural diversity in CPs achieved by the conformation versatility of ligand is systematically reviewed. In addition, the effect of ligand conformation on the properties of CPs is highlighted with discussions of potential applications of CPs in areas of storage, separation, and luminescence. [ABSTRACT FROM AUTHOR]

Over the past decades, research on proton-conductive metal-organic frameworks (MOFs) has rapidly accelerated due to the importance of energy for modern society. This review mainly focuses on some representative proton-conductive MOFs reported recently, with related discussions on the underlying proton transportation mechanisms. In the first section, we give a brief introduction to the background of proton-conductive MOFs. In the following second section, a summarization on the widely used experimental characterization techniques as well as the well-established computational methods for exploring the proton transportation mechanism is given. In the third section, some representative studies in this field are reviewed from the aspect that how to tune the proton conductivity of MOFs, with emphasis on the following factors: the impact of framework and guest molecules/ions; the modification with functionalized groups and the tuning of Brønsted acidity; the influence of phase transition, defects, and amorphization. Finally, the conclusion and perspective are presented regarding the modulation on the proton conductivity of MOFs and the rational design of novel proton-conductive MOFs. [ABSTRACT FROM AUTHOR]

• The design principles and synthesis strategies of host–guest MOFs is logically reviewed. • The properties and applications of host–guest MOFs originating from synergistic effect are demonstrated. • Further development of host–guest MOFs is suggested. Metal–organic frameworks (MOFs) as a class of unique porous crystalline materials have developed rapidly in the past decades. The unique features of component diversities, structural designability, and tunable porosities of MOFs endow them inherent superiorities as hosts to accommodate diverse species of guests. The resulting host–guest MOFs reveal a variety of properties and applications, which could be readily modulated through the tuning of the host, the guest, and the host–guest interactions. Therefore, the host–guest MOFs have attracted much attention and become a hot topic for research. This review will concentrate on the recent progress of host–guest MOFs. The achievements and understanding of host–guest MOF, including the components of host–guest systems, the types of species interactions, and the characterization methods have been reviewed and discussed. Based on this, the design and tuning principles for the construction of host–guest MOFs have been highlighted. The recently typical examples of function-oriented construction of host–guest MOF for various properties including optical, electrical, and catalytic properties have been overviewed. Furthermore, the challenges and perspectives of developing host–guest MOF materials have been generalized. [ABSTRACT FROM AUTHOR]

• The elastic properties of coordination polymers and metal–organic frameworks are introduced simply. • The recent developments of coordination polymers and metal–organic frameworks in energy conversions endowed by their elastic properties, including piezoelectricity, barocaloric effects, and thermoelectricity, are systematically overviewed. • Current challenges are discussed and future trends are envisioned for this promising field. Coordination polymers and metal–organic frameworks are now at the forefront of materials science due to their abundant structural variability and facile functional tunability. Mechanical properties of coordination polymers and metal–organic frameworks are critically important since they determine the reliability and durability during service of these materials in any future industrial applications. More importantly, the elastic properties of these materials are directly related to several energy conversion processes which include piezoelectricity, barocaloric effects, and thermoelectricity. To highlight recent progress in this fast-growing field, we summarize the elastic properties of coordination polymers and metal–organic frameworks, and overview their three kinds of energy conversions closely related to elastic properties in this review. Moreover, we discuss the intrinsic relationship between elastic and energy properties. Finally, current challenges are discussed and future trends are envisioned for this promising field. [ABSTRACT FROM AUTHOR]

Hydro(solvo)thermal synthesis is a widely-used method to assemble various molecular magnetic materials based on different types of ligands. This review mainly focuses on the study of the magnetochemistry of azide/formate-mediated molecule-based magnetic materials of our lab synthesized under hydro(solvo)thermal conditions in the presence of coligand, with an emphasis on anionic coligand of carboxylate. The first section gives a brief discussion of azido and formato complexes and some important principles obtained from magneto-structural correlation; hydro(solvo)thermal synthetic strategies will also be referred to and elucidated in this part. The next six sections give overviews of the main results obtained in our group in recent years, that is, azide/formate-mediated ferromagnetism, ferrimagnetism, spin canting (or weak ferromagnetism), antiferromagnetism, single-molecule magnets (SMMs) and single-chain magnets (SCMs), and metamagnetism. Finally, the conclusions and perspectives of azido/formato-mediated molecular magnetic materials will be presented. Some of the trends identified could provide new insights into the further development of this promising area. [ABSTRACT FROM AUTHOR]

• Cyano-bridged transition-metal-based single-molecule magnets (SMMs) and single-chain magnets (SCMs) are overviewed. • The structures of related SMMs and SCMs are summarized. • The performances and related magnetic parameters of related SMMs and SCMs are presented. Novel functional molecular-based magnetic materials, especially some members of the Prussian blue family, have gained significant attention over the past few decades as they can be used beneficially in a variety of scientific fields. Herein, we survey the latest developments in cyano-bridged transition-metal-based single-molecule magnets (SMMs) and single-chain magnets (SCMs) research. The cyanide ligand, which has a strong affinity for transition metals, is a popular bridging ligand to construct a variety of molecular-magnetic materials, depending on the type of co-ligand. This review mainly focuses on research into structural topologies and the corresponding SMMs or SCMs. The first section provides a brief introduction into SMM and SCM behavior and important principles and strategies for constructing diverse magnetic materials. The remaining sections provide overviews of significant achievements reported in recent years. In the final section we conclude by presenting perspectives on cyanometallate-based SMMs and SCMs and by providing some new insight into this promising area. [ABSTRACT FROM AUTHOR]

• The structural diversity of MOMs with triazine-based ligands is logically reviewed. • The potential applications of MOMs with triazine-based ligands are demonstrated. • Further research of MOMs owning the features of triazine moiety is suggested. Triazine-based ligands, featuring C 3 -symmetry configuration, electron-deficient and other triazine moiety determined characteristics, have facilitated the construction of a diverse set of metal-organic materials (MOMs, including discrete MOPs and distinct dimensional CPs). Therefore, over the past decades, MOMs with triazine-based ligands developed rapidly and drew tremendous attention in both chemistry and material fields. Here, the structural and functional diversity in MOMs achieved by the versatility of triazine-based ligand is systematically reviewed, and the potential applications of related MOMs in the areas of guest structure determination, luminescence, adsorption and separation, catalysis, drug delivery and magnetism are highlighted. [ABSTRACT FROM AUTHOR]