Natural enzyme mimetics with high catalytic activity at nearly neutral pH values are highly desired for their applications in biological systems. Herein the first time a stable MOF, namely MOF-808, has been shown to possess intrinsic peroxidase-like under acidic, neutral, and alkaline conditions. As novel peroxidase mimetic, MOF-808 can effectively catalyze oxidation of 3,3',5,5'-tetramethylbenzidine when H2O2 serves as oxidant, accompanied by significant color variation solution. The were...

The restriction of sulfur content in fuels has become increasingly stringent as a result the growing environmental concerns. Although several MOF-derived materials like POM@MOF composites have shown ability to catalyze oxidative desulfurization (ODS), their catalytic activities inevitably obstructed by encapsulated sites POM due blockage cavities. Therefore, MOFs with intrinsic and accessible are highly desirable for applications ultradeep ODS. Herein, four representative Zr-based (Zr-MOFs),...

A series of inorganic-organic hybrid compounds L(2)(Bi(2)Cl(10)) (L = HMV(2+) N-proton-N'-methyl-4,4'-bipyridinium for 1, L HBzV(2+) N-proton-N'-benzyl-4,4'-bipyridinium 2, and HPeV(2+) N-proton-N'-phenethyl-4,4'-bipyridinium 3) have been successfully synthesized by an in situ solvothermal reaction. Compounds 1-3, with the same metal halide as anions but different asymmetric viologen molecules cations, are ideal model investigating detailed effect photochromically active on photochromic...

A color change: X-ray-induced photochromic species are rare and can be used for detection of X-rays. highly robust X-ray-sensitive material with the discrete structure a metal-organic complex has been found to show both soft hard photochromism at room temperature. new ligand-to-ligand electron-transfer mechanism was proposed elucidate this phenomenon.

Two new member of (V)(2n+2)/2[Bi2nCl8n+2] series hybrids, (BzV)2[Bi2Cl10] (1) and (BzV)5[Bi3Cl14]2·(C6H5CH2)2O (2) (where BzV2+ = N,N′-dibenzyl-4,4′-bipyridinium (C6H5CH2)2O dibenzyl ether) have been obtained, compound 2 contains an unprecedented discrete trimer [Bi3Cl14]5– counterion. The novel in situ-synthesized symmetric viologen cation with aromatic groups on both sides 4,4′-bipy would provide more opportunities to create π···π interactions optimize the photochromic property hybrid,...

Photochromism of N-methyl-4,4′-bipyridinium (MQ+) salts and their metal complexes has never been reported. A series MQ+ coordinated halozinc [(MQ)ZnX3] (X = Cl (1), Br (2), I (3)) [(MQ)ZnCl1.53I1.47]2(MQ)ZnCl1.68I1.32 (4), with better physicochemical stability than halide the cation, have found to exhibit different photochromic behaviors. Compounds 1–3 are isostructural, but only 1 2 show photochromism. Introduction partial atoms nonphotochromic compound 3 yields 4, which also displays The...

The model compound [Zn(HCOO)2(4,4'-bipy)] (1; 4,4'-bipy = 4,4'-bipyridine) is selected in this work to demonstrate the effectiveness of our previously proposed design strategy for electron-transfer photochromic metal-organic complexes. behavior 1 has been discovered first time. Experimental and theoretical data illustrate that photochromism can be attributed electron transfer from formato formation a radical photoproduct. prefers occur between 4,4'-bipy, which are combined directly by Zn(II)...

We have studied the electron-transfer photochromism of crystalline adducts 4,4′-bipyridine (Bpy) and carboxylic acids revealed key structural parameters that decide whether can happen for first time. Experimental theoretical analyses on nine known examples showed hydrogen bonds, instead π–π stacking interactions, are defining factor to photochromism. Only presence N–H···O bonds fulfill electron transfer from carboxylate group Bpy part, although both N···O separations O–H···N suitable...

The Cr(VI) photoreduction efficiency in a Zr-based MOF is largely boosted by photosensitizer introduction and framework ionization, resulting from the great improvement of both visible light harvesting ability Cr(<sc>vi</sc>) adsorption performance.

Pathogenic bacteria have consistently posed a formidable challenge to human health, creating the critical need for effective antibacterial solutions. In response, enzyme-metal–organic framework (MOF) composites emerged as promising class of agents. This study focuses on development an enzyme-MOF composite based HZIF-8, incorporating advantages simple synthesis, ZIF-8 properties, lysozyme hydrolysis, and high biological safety. Through one-pot method, core–shell nanoparticles (HZIF-8) were...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural, spectroscopic, and electrochemical investigation of luminescent bimetallic complexes rhenium(I)Rongguang Lin, Yigang Fu, Carolyn P. Brock, Thomas F. GuarrCite this: Inorg. Chem. 1992, 31, 21, 4346–4353Publication Date (Print):October 1, 1992Publication History Published online1 May 2002Published inissue 1 October 1992https://doi.org/10.1021/ic00047a023RIGHTS & PERMISSIONSArticle Views517Altmetric-Citations67LEARN ABOUT THESE...

Ein Farbumschlag: Durch Röntgenstrahlung erzeugte photochrome Spezies können zum Nachweis von Röntgenstrahlen verwendet werden. Grundlage hierfür ist ein metallorganischer Komplex, der bei Raumtemperatur auf sowohl weiche als auch harte photochrom reagiert (siehe Bild). Mechanismus, den Elektronentransfer zwischen Liganden beschreibt und die Photochromie erklärt, wird vorgestellt.

Antibacterial photodynamic therapy (aPDT) is regarded as one of the most promising antibacterial therapies due to its nonresistance, noninvasion, and rapid sterilization. However, development materials with high aPDT efficacy still a long-standing challenge. Herein, we develop an effective composite UiO-66-(SH)2@TCPP@AgNPs by Ag encapsulation 4,4′,4″,4‴-(porphine-5,10,15,20-tetrayl)tetrakis(benzoic acid) (TCPP) dopant. Through mix-and-match strategy in self-assembly process,...

A porous MOF based on a tetranuclear copper cluster with intracluster antiferromagnetic interactions was synthesized, which reveals highly sensitive and selective sensing of small molecules.

Two supramolecular architectures were assembled from the supermolecular building blocks of calixarenes and cucurbiturils through noncovalent binding. They not only exhibit an intriguing topology but also show clearly role hydrophobic−hydrophobic hydrophilic−hydrophilic interactions in directing assembly.

β-Cyclodextrins (β-CDs) are shown to form 1:1 and 2:1 host–guest inclusion complexes with two carboxyphenyl viologens, 1-(4-carboxyphenyl)-4,4′-bipyridinium chloride (1+·Cl–) 1,1′-bis(4-carboxyphenyl)-4,4′-bipyridinium dichloride (22+·Cl2–), in an aqueous solution. The solid-state supramolecular 1+@β-CD 22+@β-CD2 demonstrate excellent photochromic properties. results of the electron-spin resonance (ESR) spectroscopy suggest that their behaviors caused by generation free radicals (V•+)....

Fluorescent polydopamine nanoparticles (PDA NPs) have been effectively synthesized by means of self-polymerization dopamine under the strong alkaline condition ethylenediamine at room temperature for 2.5 h.

Viologen bismuthate halides generally show photochromic properties. In the present work, phenylethyl alcohol was introduced into chloro bismuthates in hope to prepare crystalline materials and finally a inorganic-organic hybrid, (PeV)3(Bi2Cl9)2 (1), based on an situ generated PeV2+ cation (PeV2+ = phenethylviologen N,N′-diphenethyl-4,4′-bipyridinium), has been obtained, whose microstructure contains discrete dimer [Bi2Cl9]3– counterion identified by single crystal X-ray diffraction. More...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExcited state properties of mononuclear and binuclear rhenium(I) complexesRongguang Lin, Rich Duesing, Thomas F. GuarrCite this: Inorg. Chem. 1990, 29, 21, 4169–4172Publication Date (Print):October 1, 1990Publication History Published online1 May 2002Published inissue 1 October 1990https://pubs.acs.org/doi/10.1021/ic00346a002https://doi.org/10.1021/ic00346a002research-articleACS PublicationsRequest reuse permissionsArticle...