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Reports on highly efficient silver(I)-based thermally activated delayed fluorescence (TADF) materials are scarce due to challenges in molecular design, although these materials show great potential for photoluminescent and electroluminescent applications. Herein, a silver(I)–iodine cluster, namely Ag2I2(dppb-Ac)2, is synthesized by employing a donor–acceptor (D–A) type bisphosphine ligand. Due to the introduction of electron-donating iodine ligands, Ag2I2(dppb-Ac)2 exhibits an emissive singlet state characterized by (metal + iodine)-to-ligand charge transfer and intra-ligand charge transfer transitions, as well as a small singlet–triplet energy gap. Additionally, its non-planar, highly distorted D–A structure efficiently separates adjacent molecules in aggregated state. As a result, Ag2I2(dppb-Ac)2 exhibits efficient TADF and suppressed luminescence concentration quenching in thin films. For instance, the 10 wt%-doped PMMA film and neat film of Ag2I2(dppb-Ac)2 display bright bluish-green and green emission, peaking at 506 and 532 nm, with photoluminescence quantum yields (PLQYs) of 70% and 52%, and lifetimes of 18.9 and 7.9 μs, respectively. The high PLQYs and efficiently suppressed emission concentration quenching of Ag2I2(dppb-Ac)2 in films are outstanding among reported Ag(I)-based TADF emitters. [ABSTRACT FROM AUTHOR]

A new sodium tellurate has been hydrothermally synthesized and comprehensively analysed using spectroscopic and thermogravimetric techniques, resulting in the determination of its composition as NaTeO3(OH). The analysis of synchrotron X-ray and neutron diffraction data indicates that NaTeO3(OH) has a crystal structure similar to that of the previously reported tellurate, KTeO3(OH), with the space group P21/a (No. 14). NaTeO3(OH) consists of zigzag one-dimensional chains built by edge-sharing TeO6 octahedra, running parallel to the c-axis and connected to sodium and hydrogen atoms. The hydrogen atoms covalently bond to the terminal oxygen atoms on the one-dimensional chain and also form hydrogen bonds with other terminal oxygen atoms on nearby chains. The structure has been confirmed by optimization using the pseudopotential method and performing Bond Valence Sum (BVS) analysis. Although Li+ ions in LiTeO3(OH) can be exchanged reversibly with H+ ions, no ion exchange behaviour is observed in NaTeO3(OH). The difference is attributed to the size of the alkali ions and their crystal structure. [ABSTRACT FROM AUTHOR]

Correction for 'Silver(I)–iodine cluster with efficient thermally activated delayed fluorescence and suppressed concentration quenching' by Xiao Li et al., Dalton Trans., 2025, https://doi.org/10.1039/d4dt02855d. [ABSTRACT FROM AUTHOR]

The first example of both cation- and anion-ordered rutile-type derivative LiTeO3(OH) (= HLiTeO4) has been discovered. LiTeO3(OH) belongs to a non-centrosymmetric space group P21. Both cations (Li+/Te6+) and anions (O2−/OH−) exhibit occupational ordering in LiTeO3(OH). [ABSTRACT FROM AUTHOR]

The insertion of electron-rich iodoplumbate nanowires and nanolayers into layered electron-deficient metal-viologen frameworks leads to two donor–acceptor hybrid structures, respectively, which exhibit interesting semiconductor behaviors. Due to the bicontinuous donor and acceptor components, both of them exhibit highly efficient photocatalytic degradation activities over organic dyes under visible light irradiation compared to those of other iodoplumbate hybrid materials. [ABSTRACT FROM AUTHOR]