Rare Earth Nitrate Hybrid Double Perovskites [MeN][MLn(NO)] (M = Na-Cs; Ln = La-Gd, ex. Pm).

An exploration of the synthetic and structural phase space of rare earth hybrid double perovskites AB'BX (A = organocation, B' = M, B = M, X = molecular bridging anion) that include X = NO and B' = alkali metal is reported, complementing earlier studies of the [MeN][KB(NO)] (B = Am, Cm, La-Nd, Sm-Lu, Y) (MeN = (CH)N) compounds. In the present efforts, the synthetic phase space of these systems is explored by varying the identity of the alkali metal ion at the B'-site. Herein, we report three new series of the form [MeN][B'B(NO)] (B = La-Nd, Sm-Gd; B' = Na, Rb, Cs).

Sex disparities in lung cancer survival rates based on screening status.

Objective: Low dose computed tomography (LDCT) became the standard method for lung cancer (LC) screening in 2013. However, it is unclear whether there are differences in survival rates based on sex and whether the differences depend on screening status. We aimed to evaluate the LC survival rates between females and males based on screening.

A novel symmetric pyrazine (pyz)-bridged uranyl dimer [UOCl(HO)(Pyz)]: synthesis, structure and computational analysis.

Herein we report on the synthesis of (HPyz)[UOCl(HO)(Pyz)]·2HO which features a novel pyrazine-bridged uranyl dimer, [UOCl(HO)(Pyz)]. A rigorous computational and experimental analysis of this compound was performed to fully explore the influence of coordination on the electronic structure and potential charge-transfer characteristics of this dimer, revealing a delocalized π-system across the bridging pyrazine and the axial components of both uranyl centers. Electrostatic surface potentials, used to rationalize the observed assembly, indicate a decreased basicity of the uranyl oxo [UOCl], and signify a lessened capacity for the terminal -yl oxos of the [UOCl(HO)(Pyz)] dimer to participate in supramolecular assembly.

Bimetallic uranyl/cobalt(II) isothiocyanates: structure, property and spectroscopic analysis of homo- and heterometallic phases.

We report the synthesis and characterization of a family of UO22+/Co2+ isothiocyanate materials containing [UO2(NCS)5]3- and/or [Co(NCS)4]2- building units charged balanced by tetramethylammonium cations and assembled via SS or SOyl non-covalent interactions (NCIs), namely (C4H12N)3[UO2(NCS)5], (C4H12N)2[Co(NCS)4], and (C4H12N)5[Co(NCS)4][UO2(NCS)5]. The homometallic uranyl phase preferentially assembles via SS interactions, whereas in the heterometallic phase SOyl interactions are predominant. The variation in assembly mode is explored using electrostatic surfaces potentials, revealing that the pendant -NCS ligands of the [Co(NCS)4]2- anion is capable of outcompeting those of the [UO2(NCS)5]3- anion.

Novel Heterometallic Uranyl-Transition Metal Materials: Structure, Topology, and Solid State Photoluminescence Properties.

Six new uranyl hybrid materials have been synthesized solvothermally utilizing the ligands 2,2'-bipyridine-3,3'-dicarboxylic acid (HL) and 2,2':6',2''-terpyridine (TPY). The six compounds are classified as either molecular complexes (IO connectivity), [(UO)(L)(TPY)]·HO (1), [Ni(TPY)][(UO)(L)]·3HO (2), and [Cu(TPY)][(UO)(L)]·3HO (3), or 3D metal-organic frameworks (MOFs, IO connectivity), [Cu(UO)(OH)(CHO)(L)(TPY)]·6HO (4), [Zn(UO)(OH)(NO)(CHO)(L)(TPY)]·4HO (5), and Na[Ni(UO)(OH)(O)(L)]·9HO (6). A discussion of the influence of transition metal incorporation, chelating effects of the ligand, and synthesis conditions on the formation of uranyl materials is presented.