Dalton Transactions

doi: 10.1039/d3dt90062bpmid: N/A

doi: 10.1039/d3dt90063kpmid: N/A

doi: 10.1039/d3dt90064apmid: N/A

Yang, Zongfei; Li, Jing; Niu, Jingyang; Wang, Jingping

doi: 10.1039/d2dt03319dpmid: N/A

Since the famous Swedish chemist Scheele described molybdenum blue for the first time in 1778, polyoxometalate (POM) chemistry has made significant progress in its more than 200-year history. Compared with the POM chemistry of Mo, W and V, significant improvement of polyoxotantalates (POTas) occurred mainly during the last few years. In this paper, complexes with different structures, including isopolyoxotantalates (IPOTas), organic–inorganic hybrid POTas, Ta/W mixed POMs and heteropolyoxotantalates (HPOTas) with their derivatives, are reviewed, aiming at providing some useful guidance for further exploration and discovery of more exciting POTas with innovative architectures and excellent performances. Herein, we highlight and discuss the structural features of POTas according to various structural types. In addition, the synthesis strategies and related applications, especially in photocatalysis, are reviewed.

Chen, Ji-Tun; Zhou, Teng-Da; Sun, Wen-Bin

doi: 10.1039/d3dt00481cpmid: N/A

Lanthanide-based single-molecule magnets (SMMs) have captivated the attention of researchers due to their great potential application in quantum information processing, storage, spintronics etc. Recent years have witnessed continuous breakthroughs in the field of SMMs, which make them very promising to be used in future practical functional applications. However, there remain formidable obstacles involving suppression of the quantum tunneling of magnetization (QTM) to maximize magnetic anisotropy, integrating and applying them in devices etc. Meanwhile, multifunctional 4f-based SMMs, which combine optical and electronic properties, are attracting increasing attention. This will provide a new perspective for future multifunctional device applications and deep insight into understanding the magnetic relaxation behavior as well. In this frontier article, we highlight the research that recently emerged involving 4f-based SMMs in combination with luminescence thermometry and photochromic and ferroelectric properties, respectively.

Ziółkowska, A.; Szynkiewicz, N.; Ryl, J.; Ponikiewski, Ł.

doi: 10.1039/d3dt00626cpmid: 36987876

The reactivities of two selected phosphanylphosphaalkenes, Ph2CP-PtBu2 (1a) and (p-MeO-Ph)2CP-PtBu2 (1b), toward CuCl, AgCl and (tht)AuCl (tht = tetrahydrothiophene) were investigated. As a result, new phosphanylphosphaalkene dimeric and monomeric complexes were formed (Cu and Ag dimeric and Au monomeric). All obtained products were air and moisture stable and light insensitive.

Cao, Qiulin; Liu, Mengxin; Shi, Xinan; Ni, Zhan; Li, Bo; Lu, Chengzeng; Pan, Daocheng

doi: 10.1039/d3dt00594apmid: 36987882

We developed a room-temperature and ultrafast Eu3+-ion doping approach for the synthesis of highly luminescent Eu-doped CaMoO4 nanoparticles. Firstly, CaMoO4 nanoparticles with a particle size of 3.9 nm are rapidly prepared using a room temperature co-precipitation approach. Subsequently, Eu-doped CaMoO4 nanoparticles with a photoluminescence quantum yield of up to 75% are synthesized by a post-cation exchange reaction at room temperature. This facile and room-temperature synthetic strategy enables us to prepare highly luminescent and extremely small rare earth ion-doped metal oxide nanocrystals.

Klementyeva, Svetlana V.; Schrenk, Claudio; Zhang, Minghui; Khusniyarov, Marat M.

doi: 10.1039/d3dt00578jpmid: 36988429

We report the synthesis and characterization of ionic compounds [(thf)4YbI]2[Ge9(Hyp)3]2 (1) and [(thf)5LnI]4[Ge9(Hyp)3]4 (Ln = Eu (2), Sm (3)), (Hyp = Si(SiMe3)3). All compounds were examined by UV-Vis spectroscopy and a blue luminescence of Eu2+ was found. The solid state magnetic measurements of complexes 2 and 3 confirmed the presence of divalent lanthanides.

Nau, Moritz; Casper, Larissa A.; Haug, Gernot; Linseis, Michael; Demeshko, Serhiy; Winter, Rainer F.

doi: 10.1039/d3dt00857fpmid: N/A

Permethylation of the phenylene linker in a cationic ferrocenyl-phenylthioxanthylium dyad increases the amount of the diradical ferrocenium thioxanthyl radical valence tautomer and aids in supressing dimerization of the latter and of the one-electron reduced neutral radical.

Ishizaki, Toshiharu; Ozeki, Tomoji

doi: 10.1039/d2dt03999kpmid: 36779264

This is the first report on slow magnetic relaxation in an S = 1/2 system based on a first-row transition metal ion with the polyoxometalate skeleton [(n-C4H9)4N]4H2[SiW11O39Cu] (1). The X-band electron-spin-resonance spectrum of 1 measured at room temperature indicates that the copper ion experiences significantly reduced intermolecular interactions compared to the potassium salt and that it adopts a five-coordinated square-pyramidal coordination geometry. The AC magnetic-susceptibility measurements revealed that 1 undergoes slow magnetic relaxation in an applied static magnetic field (Hdc). The extracted spin-lattice relaxation time (92 ms at 1.8 K and Hdc = 5000 Oe) for 5% magnetically diluted 1, [(n-C4H9)4N]4H2[SiW11O39Cu0.05Zn0.95] (dil.1), is comparable to those of other potential S = 1/2 spin qubits. A relaxation-time analysis indicated that Raman spin-lattice relaxation dominates even at low temperatures in an optimized field. The extracted Raman exponent (n = 2.30) is smaller than those of other S = 1/2 complexes that carry organic ligands, which implies that the decrease in relaxation time at higher temperatures is likely to be moderate.