[Co(H₂O)₆]₃[U₂O₄F₇]₂: A Model System for Understanding the Formation of Dimensionally Reduced Materials

Abstract

A cobalt containing mixed-anion uranyl oxidefluoride was synthesized using a mild hydrothermal crystal growth method. The uranyl ions are condensed into a onedimensional chain motif separated by isolated cobalt hexa-aqua centers. The 1-D uranyl material was characterized by singlecrystal and powder X-ray diffraction. The optical, thermal, and magnetic properties were studied and are reported herein. Using the reported composition as a model, a system was derived to predict the dimensionality of hypothetical structures to advance our ability to rationally predict solid-state materials.

Rational Design of the Nonlinear Optical Response in a Tin Iodate Fluoride Sn(IO3)2F2

“…SnO 6 and IO 3 , the CS space group (P1̅ ) makes the polar anions adopt antiparallel arrangements, resulting in no NLOactivity. Inspired by the above molecular engineering strategy, 23 through careful structure analysis, we found that if "scissor" F − ions are employed to cut off the "dangling" IO 3…”

“…Regrettably, although 1 has the distortion and acentric FBUs SnO 6 and IO 3 , the CS space group ( P 1̅) makes the polar anions adopt antiparallel arrangements, resulting in no NLO-activity. Inspired by the above molecular engineering strategy, through careful structure analysis, we found that if “scissor” F – ions are employed to cut off the “dangling” IO 3 – ions in Sn­(IO 3 ) 4 , a new tin­(IV) iodate fluoride with NCS structure may be produced (the detailed design ideas will be presented later). As expected, a new polar NCS Sn­(IO 3 ) 2 F 2 ( 2 ) has been successfully obtained by a rational chemical tailoring design.…”

Structural, Spectroscopic, and Computational Analysis of Halogen- and Hydrogen-Bonding Effects within a Series of Uranyl Fluorides with 4-Halopyridinium

“…Previous work done by our group with [UO 2 X 4 ] 2– bearing materials (X = Cl, Br) has explored noncovalent interactions as a means of assembly in uranyl-organic compounds. − A number of these compounds feature X···O yl interactions with the organic cations, which have been shown to affect the electronic structure and bonding properties of the uranyl . A logical extension of these efforts is to include uranyl fluoride compositions, yet notably, these do not typically form isolated anionic units − and instead oligomerize to form one-dimensional chains, two-dimensional sheets, and three-dimensional frameworks as [UO 2 F x O y H z ] n − ( x = 2–5; y = 0–2; z = 0–1). − These differing dimensionalities provide an expanded platform for studying uranyl oxo interactions.…”

NanMTh6F30: A Large Family of Quaternary Thorium Fluorides

“…Among the many reasons for these studies, the most important one is their use in nuclear power and the consequent problems related to refinement and enrichment of the uranium ore, nuclear fuel preparation, and finally spent nuclear fuel management. − All except the last step have been extensively studied at the dawn of the nuclear age, and most of the required procedures have been thoroughly worked out. On the last step, nuclear waste management, there remain challenges that need to be addressed, prompting us to investigate the synthesis and study of new actinide-bearing materials. − …”