José de Jesús Velazquez-Garcia

Hydro‐ and Lipophilicity of Molecular‐Size‐Controlled Hydrogel Drug Carriers

Elisabeth Erbes, Naireeta Biswas, Calvin J. Brett, Matthias Schwartzkopf et autres

ABSTRACT Nano‐sized hydrogel drug carriers with tailored hydro‐ and lipophilicity are designed and their encapsulation and structure‐forming capabilities investigated in real‐time. These nano‐carriers are built from cellulose and peptide hydrogels in tandem with a nano‐stacked interwoven design and alternating hydro‐ and lipophilicity, …

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Beyond the size: Assessing the influence of synthesis parameters on ZIF-8 monolith degradation in aqueous environments

José de Jesús Velazquez-Garcia, Susann Frenzke, Dina Huanaco, H. Sanchez Cornejo et autres

This article reports the room-temperature synthesis of ZIF-8 monoliths, systematically varying synthesis parameters while maintaining a constant metal:ligand ratio of 1:7.9. The washing procedure, aging time, centrifugal speed, precursor concentration, solvent type, ammonia concentration, and metal salt were changed to investigate their …

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Beyond the size: Assessing the influence of synthesis parameters on ZIF-8 monolith degradation in aqueous environments

José de Jesús Velazquez-Garcia, Susann Frenzke, Dina Huanaco, Huanaco Quispe Dina Marleny et autres

Crystal structure of tris[hexakis(imidazole)cobalt(II)] bis(benzene-1,3,5-tricarboxylate)

José de Jesús Velazquez-Garcia, Christos Bintas, Faegheh Khademhir, Bassima Knjo et autres

The title compound, [Co II (C 3 H 4 N 2 ) 6 ] 3 (C 9 H 3 O 6 ) 2 ( 1 ), was synthesized from cobalt chloride(II), benzene-1,3,5-tricarboxylic acid (H 3 btc) and imidazole (Im) in an ethanol/DMF …

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Molecular-Size Control of Properties of Therapeutic Nano-Paper Allows for Selective Drug Storage in Small Doses

Elisabeth Erbes, Calvin J. Gavilett, Matthias Schwartzkopf, Krishnayan Basuroy et autres

A novel concept of nano-scaled interwoven templates for drug delivery with alternating hydro- and lipophilicity properties is introduced. They are built from cellulose and peptide hydrogel in tandem, and characterized by a nano-stacked interwoven design, thus enabling for tuning the lipophilicity in …

Photoinduced Low Spin to High Spin Transition in a [2x2] Fe(II) Metallogrid: Diode Laser-Pumped Photocrystallography at the P11 Beamline in PETRA III, DESY

Krishnayan Basuroy, José de Jesús Velazquez-Garcia, Sreeju Sreekantan Nair Lalithambika, A. Das Barman et autres

We report on the photoinduced spin crossover (SCO) transition from a 2HS-2LS to a 3HS-1LS state in a [2x2] Fe(II) metallogrid complex using molecular crystals with static photocrystallography at a first ever attempt in the beamline P11 of the PETRA III synchrotron, …

Crystal structure of tris(2-methyl-1 H -imidazol-3-ium) benzene-1,3,5-tricarboxylate

Weronika Łukaszczyk, Julia Leibing, Sudem Yildizbas, Irwana Rizvanovic et autres

The structure of the title salt, 3C 4 H 7 N 2 + ·C 9 H 3 O 6 3− ( 1 ), is reported. The compound is formed with three 2-methylimidazolium cations and a fully deprotonated trimesic acid. The structure is …

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Synthesis and structure of tris(2-methyl-1H-imidazol-3-ium) 5-carboxybenzene-1,3-dicarboxylate 3,5-dicarboxybenzoate

Lina Maria Asprilla-Herrera, Simone Techert, José de Jesús Velazquez-Garcia

The structure of the title salt, 3C4H7N2 +·C9H5O6 −·C9H4O6 2−, 1, consists of three 2-methyl-imidazolium cations and both a single and a doubly deprotonated form of trimesic acid as anions. A detailed analysis of the bond lengths and angles reveals both differences …

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Ternary molecular switching in a single-crystal optical actuator with correlated crystal strain

Jacqueline M. Cole, David J. Gosztola, José de Jesús Velazquez-Garcia, Jeffrey R. Guest

Abstract A growing portfolio of single-crystal optical actuators is forging a new class of photonic materials that hold prospects for quantum technologies. Ruthenium-based complexes that exhibit this phenomenon via SO2-linkage photoisomerisation are of particular interest since they display multiple metastable states, once …

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Neutral and ionic Co( ii ) metal–organic frameworks with 2-methylimidazole and trimesate: design and evaluation for molecule encapsulation and slow release

José de Jesús Velazquez-Garcia, L. De Los Santos Valladares, C. H. W. Barnes, Sandra König et autres

SCXRD. The encapsulated molecules were then slowly released in ethanol, with a release of up to 30 mg of azobenzene per g of MOF in a period of 60 days.

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Size matters: limitations of the ZIF-8 monolith and its Ni-, Co- and Cu-doped variants for the adsorption of rhodamine B

José de Jesús Velazquez-Garcia, Susann Frenzke, L. De Los Santos Valladares, C. H. W. Barnes et autres

ZIF-8 monoliths, and their Co-, Ni- and Cu-doped variants, are not suitable for water pollutant adsorption due to two key limitations: poor aqueous stability and restricted accessibility of large pollutants to the pores.

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Front Cover: Synthesis, Characterization and Photophysical Properties of a New Family of Rare‐Earth Cluster‐Based Metal‐Organic Frameworks (Chem. Eur. J. 60/2024)

Hudson A. Bicalho, Christopher Copeman, Helliomar P. Barbosa, P. Rafael Donnarumma et autres

A new series of rare-earth metal–organic frameworks with 6-connected hexanuclear cluster nodes and spn topology are reported. They exhibit photoluminescence spanning the visible and near-infrared regions of the electromagnetic spectrum. More information can be found in the Research Article by A. J. …

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