The long-sought-after crystal structure of Fe(tpa)(NCS)2 (1, tpa = tris(2-pyridylmethyl)amine), an otherwise well-studied spin-crossover (SCO) complex, has been obtained, and its one-step, incomplete spin transition was correlated to solid-state structures at different temperatures. Upon exposure methanol vapor, single-crystal-to-single-crystal transformation 1 a new SCO compound, 2, formulated as {[Fe(tpa)(NCS)2]·[Fe(tpa)(NCS)2·CH3OH]}, occurs with dramatic color change from yellow red....

The incorporation of large π-conjugated ligands into metal–organic frameworks (MOFs) can introduce intriguing photophysical and electrochemical properties the framework. However, these effects are often hindered by strong π–π interaction low solubility arylated ligands. Herein, we report synthesis a porous zirconium-based MOF, Zr6(μ3-O)4(μ3-OH)4(OH)6(H2O)6(HCHC) (PCN-136, HCHC = hexakis(4-carboxyphenyl)hexabenzocoronene), which is composed hexacarboxylate linker with hexabenzocoronene...

One of the emerging problems plaguing chemical industry today is efficient and cost-effective separation C2 hydrocarbons. In order to help address this problem, we report a new material, NbU-1, constructed by extremely cheap starting materials. The special structural characteristics NbU-1 such as planar, mixed-valence copper clusters Lewis-basic adsorption channels enforce interactions with acetylene molecules that lead highest kinetic efficiency for C2H2/C2H4. Via DFT-D calculations, it...

The highly selective photoreduction of CO2 into valuable small-molecule chemical feedstocks such as CO is an effective strategy for addressing the energy crisis and environmental problems. However, it remains a challenge because complex process usually generates multiple possible products requires subsequent separation step. In this paper, 2D monolayer bilayer porphyrin-based metal-organic frameworks (MOFs) are successfully constructed by adjusting reaction temperature solvent polarity with...

Abstract Consecutive two-dimensional frameworks comprised of molecular or cluster building blocks in large area represent ideal candidates for membranes sieving molecules and nano-objects, but challenges still remain methodology practical preparation. Here we exploit a new strategy to build soft single-layer ionic organic–inorganic via electrostatic interaction without preferential binding direction water. Upon consideration steric effect additional interaction, polyanionic clusters as...

Multicomponent metal-organic frameworks (MOFs) promise the precise placement of synergistic functional groups with atomic-level precision, capable promoting fascinating developments in basic sciences and applications. However, complexity multicomponent systems poses a challenge to their structural design synthesis. Herein, we show that linkers low symmetry can bring new opportunities construction MOFs. A carbazole-tetracarboxylate linker C s point group was designed combined an 8-connected...

Herein, a new luminescent zirconium MOF [Zr-BBI, BBI = 4,4',4″,4‴-(1,4-phenylenebis(1H-imidazole-2,4,5-triyl))tetrabenzoic acid] was successfully constructed by rationally designed functionalized bisimidazole tetracarboxylic acid ligand. Zr-BBI consists of eight-connected Zr6 clusters and four-connected ligands. The high connection mode must be responsible for the stabilities in both acidic basic systems. Apart from stability, inherent units endow with traits intense fluorescent emission as...

By utilizing an organic linker containing two photoactive groups, Zr-MOF with multiple photofunctionalities, such as photochromism, photo-induced structural transformation, and photo-catalysis, has been explored.

As an efficient catalyst for NH 3 production via NO 2 − reduction, Co nanoparticles decorated radix cynanchi paniculati-derived carbon exhibits a high faradaic efficiency of 92.77% with yield 1235.62 μmol h −1 cm −2 at −0.8 V.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEfficient .alpha.-halogenation of acyl chlorides by N-bromosuccinimide, N-chlorosuccinimide, and molecular iodineDavid N. Harpp, L. Q. Bao, Catherine J. Black, John G. Gleason, Roger A. SmithCite this: Org. Chem. 1975, 40, 23, 3420–3427Publication Date (Print):November 1, 1975Publication History Published online1 May 2002Published inissue 1 November 1975https://doi.org/10.1021/jo00911a026RIGHTS & PERMISSIONSArticle...

Two new cyclic pentapeptides (1 and 2) the known blazein (3), ganodesterone (4), ergosterin (5), cerevisterol (6), 24-methylcholesta-4,6,8(14),22-tetraen-3-one (7), 5,8-epidioxyergosta-6,22-dien-3-ol (8), 16-α-d-mannopyranosyloxyisopimar-7-en-19-oic acid (9), 16-hydroxy isopimar-7-en-19-oic (10) have been isolated from crude extract of an endolichenic Xylaria sp. The structures 1 2 were elucidated primarily by NMR MS methods. absolute configurations assigned using Marfey's method on their...

Abstract Heterometallic metal–organic frameworks (MOFs) allow the precise placement of various metals at atomic precision within a porous framework. This new level control by MOFs promises fascinating advances in basic science and application. However, rational design synthesis heterometallic remains challenge due to complexity systems. Herein, we show that bimetallic with MX 2 (INA) 4 moieties (INA=isonicotinate; M=Co 2+ or Fe ; X=OH − , Cl Br I NCS NCSe ) can be generated sequential...

Postsynthetic metalation (PSM) has been employed as a robust method for the postsynthetic modification of metal-organic frameworks (MOFs). However, lack relevant information that can be obtained postsynthetically introduced metallic ions hindered development PSM applications. Thanks to advancement in single-crystal X-ray diffraction (SCXRD) technology, there have few recent examples which successful introduction single metal into MOFs occurred at defined chelating sites. These works provided...

A new luminescent Ln-MOF-based sensor with hydrolytic stability has been successfully prepared.

A Ru@FeNi LDH/MOF core–shell heterostructure with an ultralow content of Ru nanoparticles loading on the heterointerface FeNi LDH/MOFs was designed for electrochemical oxygen evolution.

By using a ligand containing pyridyl and carboxylate groups as units, novel (3,36)-connected self-interpenetrated metal–organic framework was constructed, which exhibited high thermal stability gas sorption capabilities.

A novel three-dimensional (3D) Fe(II) metal–organic framework (MOF), [Fe2(pptp)4·2H2O]n (1), constructed from the rigid 2-(3-(4-(pyridin-4-yl)phenyl)-1H-1,2,4-triazol-5-yl)pyridine (Hpptp) ligand was synthesized and structurally characterized. Complex 1 exhibits a two-dimensional (2D) → 3D polycatenated based on inclined interlocked 2D 44-sql grids. Variable-temperature magnetic susceptibility measurements reveal that is rare example exhibiting thermal-driven dehydration consequently...

Through topology-guided synthesis, a Zr-based mesoporous MOF was successfully constructed, adopting β-cristobalite-type structure. The is embedded with well-arranged terpyridine coordination sites for facile post-synthetic metalation, and can be effectively used as general scaffold the preparation of noble-metal-free catalysts. For instance, scaffolded metal@MOF material exhibits highly efficient catalytic activity alkene epoxidation arene borylation.

A new Cr metal–organic framework was fabricated <italic>via</italic> post-synthetic metalation, which exhibited enhanced separation performance for C₂H₂/C₂H₄ compared to its template of the isostructural Fe framework.

Due to the structural advantages displayed by Metal–Organic Frameworks (MOFs), integrating Valence Tautomerism (VT) systems within MOFs could be an effective strategy in order break through constraints of traditional ones. Herein, we report first successful integration a VT system into MOF termed VT-MOF-1. The characteristics VT-MOF-1, such as dinuclear cobalt-catechol clusters and solvent-accessible pores, are both innovative novel, potentially yielding new vitality field. In addition,...

Abstract Stimuli‐responsive programmable materials exhibit remarkable potential for smart applications due to their ability attain multi‐stable states through structural adaptability upon guest molecule removal or exchange. However, achieving designability remains challenging, particularly in maintaining the crystallinity single‐crystal‐to‐single‐crystal (SCSC) transformations and ensuring tunable activation. In this study, it is demonstrated that SCSC between an empty monoclinic framework...