Dalton Transactions

doi: 10.1039/D2DT90135Hpmid: N/A

doi: 10.1039/D2DT90136Fpmid: N/A

doi: 10.1039/D2DT90137Dpmid: N/A

Konieczny, Piotr; Sas, Wojciech; Czernia, Dominik; Pacanowska, Aleksandra; Fitta, Magdalena; Peka, Robert

doi: 10.1039/d2dt01565jpmid: 35900061

The magnetocaloriceffect is considered as an energy-efficient and environmentally friendly technique which can take cooling technology to the next level. Apart from its commercial application at room temperature, magnetic refrigeration is an up-and-coming solution for the cryogenic regime, especially as an alternative to He3 systems. Molecular magnets reveal advantageous features for ultra-low cooling which are competitive with intermetallic and lanthanide alloys. Here, we present a guide to the current status of magnetocaloric effect research of molecular magnets with a theoretical background focused on the inverse magnetocaloric effect and an overview of recent results and developments, including the rotating magnetocaloric effect.

Iizuka, Kosuke; Nakajima, Yumiko; Sato, Kazuhiko

doi: 10.1039/d2dt01733dpmid: 35946573

Heterolytic cleavage of a SiH bond was achieved mediated by a metalligand cooperation of a cationic iridium amido complex. The reaction was applied to the catalytic hydrosilylation of benzaldehyde and its derivatives, affording the corresponding hydrosilylated products in moderate to good yields.

Haufe, Lisa C.; Arrowsmith, Merle; Dietz, Maximilian; Grtner, Annalena; Bertermann, Rdiger; Braunschweig, Holger

doi: 10.1039/d2dt02135hpmid: 35861163

The 1,3-bromoboration of [W(N2)2(dppe)2] (dppe = 1,2-bis(diphenylphosphino)ethane) with B2Br4(SMe2)2 in the presence of various Lewis bases L yields diboranyldiazenido complexes, with L coordinating either at the terminal or internal boron atom. The 2:1 reaction of [W(N2)2(dppe)2] and B2Br4(SMe2)2 yields a 1,2-bis(diazenido)diborane-bridged ditungsten complex with a fully planar -conjugated BrWN2B2Br2N2WBr core.

Cooper, Saul M.; Siakalli, Christina; White, Andrew J. P.; Frei, Angelo; Miller, Philip W.; Long, Nicholas J.

doi: 10.1039/d2dt02157apmid: 35920379

Rhenium-based metallodrugs have recently been highlighted as promising candidates for new antibiotics to combat multi-drug resistant (MDR) pathogens. A new class of rhenium(V) dioxo complexes were prepared from readily accessible diphosphine ligands, and have been shown to possess potent activity against Staphylococcus aureus (S. aureus) and Candida albicans (C. albicans) alongside low human cell toxicity.

Floresta, Giuseppe; Memdouh, Siham; Pham, Truc; Ma, Michelle T.; Blower, Philip J.; Hider, Robert C.; Abbate, Vincenzo; Cilibrizzi, Agostino

doi: 10.1039/d2dt00980cpmid: 35972045

Expression of the cellular transmembrane receptor αvβ6 integrin is mostly restricted to malignant epithelial cells in a wide variety of carcinomas, including pancreatic and others derived from epithelial tissues. Thus, this protein is considered an attractive target for tumour imaging and therapy. Two different 68Ga hexadentate tris (3,4-hydroxypyridinone) (THP) chelators were produced in this study and coupled to the αvβ6 integrin–selective peptide cyclo(FRGDLAFp(NMe)K) via NHS chemistry. Radiolabelling experiments confirmed a high radiochemical yield of the two PET probes. In addition, cellular binding studies showed high binding affinities in the nanomolar range. The two integrin αvβ6-peptide-THP synthesized and radiolabeled in this study will facilitate in vivo monitoring of transmembrane receptor αvβ6 integrin by using the advantage of THP chemistry for rapid, efficient and stable gallium chelation.

Wedal, Justin C.; Ziller, Joseph W.; Evans, William J.

doi: 10.1039/d2dt01926dpmid: 35980149

The U(V) imido complex (C5Me5)2UVI(NSiMe3), 1, was crystallographically characterized from the reaction of (C5Me5)2UIIII(THF) with N3SiMe3 which demonstrates that it can be an intermediate in the reaction which ultimately forms (C5Me5)2UVI(NSiMe3)2 and (C5Me5)2UIVI2. U(V) intermediates have been proposed in such reactions, but have not been previously observed. The direct observation of 1 provides insight into the reaction mechanisms of U(III) compounds with azide reagents.

Liu, Tingting; Liu, Qian; Xue, Yun; Yang, Suliang; Ma, Fuqiu; Tian, Guoxin

doi: 10.1039/d2dt02223kpmid: 35980190

As the primary functional groups of amidoxime sorbents for uranium recovery from seawater, di(amidoxime) ligands can be cyclized in situ into different ligands in the presence of Cu(ii)/Ni(ii) at different pH values. Here we first found that a linear ligand glutardiamidoxime can be catalyzed into a cyclic ligand glutarimidedioxime by Ni(ii) in acidic solution.