Article
Chemistry, Inorganic & Nuclear
Jayvic C. Jimenez, Zehao Zhou, Arnold L. Rheingold, Shane M. Parker, Genevieve Sauve
Summary: Tetraphenylazadipyrromethenes (ADPs) are promising near-infrared (NIR) dyes with potential applications in transparent solar cells and NIR photodetectors. By optimizing the coordination and substitutions, the properties of ADP complexes can be enhanced, making them suitable for organic electronic applications with low optical gap and high quantum yield.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Krista P. Balto, Milan Gembicky, Arnold L. Rheingold, Joshua S. Figueroa
Summary: Mixed-metal solid-state framework materials are being explored for their potential applications in catalysis and chemical separations. A novel heteroditopic ligand has been developed, which allows for selective binding of low-valent metals and hard Lewis acidic metals within the framework structure. This study demonstrates a promising approach for incorporating low-valent metal centers in mixed-metal frameworks.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Organic
Ga Young Lee, Elizabeth Hu, Arnold L. Rheingold, K. N. Houk, Ellen M. Sletten
Summary: A systematic study of arene-perfluoroarene interactions in solution reveals that factors such as fluorination, extension of pi systems, and enhancement of solvent polarity significantly influence the stability of stacking energy. Experimental results in aqueous solution show that electrostatic and dispersion interactions, as well as the hydrophobic effect, play key roles in the impressive binding energy observed.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
David Rendon-Nava, Deyanira Angeles-Beltran, Arnold L. Rheingold, Daniel Mendoza-Espinosa
Summary: The synthesis of a CCC-pincer palladium(II) complex 2 and tris(carbene) dicationic palladium complex 3 containing multiple NHCs was reported, which showed excellent catalytic performance in cross coupling reactions and hydrosilylation of terminal alkynes.
Article
Chemistry, Multidisciplinary
Guobi Li, Rhett Smith, Milan Gembicky, Arnold L. Rheingold, John D. Protasiewicz
Summary: In this study, a di-hypervalent iodine compound was synthesized using a bulky 1,4-di-iodobenzene with four para-Bu-t-C6H4 group substituents. The compound underwent cyclization under mild conditions to form a dicyclic di-iodonium di-triflate salt. The introduction of para-tert-butyl groups improved the solubility of the compounds, making them more suitable for applications as recyclable reagents, materials precursors, and Lewis acids.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Zakary T. Ekstrom, Arnold L. Rheingold, John D. Protasiewicz
Summary: Two bis(benzoxaphosphole)s were synthesized and characterized, with one compound exhibiting flexibility in structure and blue fluorescence, while the other compound showed no significant emission due to the quenching ability of ferrocene in its excited state.
PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS
(2022)
Article
Chemistry, Physical
Muyuan Zhao, Jayvic C. Jimenez, Chunlai Wang, Guanchun Rui, Tingrui Ma, Chenwei Lu, Arnold L. Rheingold, Ruipeng Li, Lei Zhu, Genevieve Sauve
Summary: This study explores the fluorination of a zinc(II) complex to increase intermolecular pi-pi stacking interactions and improve electron mobility and organic photovoltaic performance.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Inorganic & Nuclear
Jorge A. Garduno, David S. Glueck, Ritchie E. Hernandez, Joshua S. Figueroa, Arnold L. Rheingold
Summary: In this study, it was discovered through a series of experiments that under specific conditions, the weakly coordinating fluorinated tetraarylborate anion can react with a platinum cation and weak acid water at room temperature, decomposing three bonds and producing new compounds.
Article
Chemistry, Physical
Thomas Louis-Goff, Huu Vinh Trinh, Eileen Chen, Arnold L. Rheingold, Christian Ehm, Jakub Hyvl
Summary: An efficient catalytic difluorocarbenation reaction has been developed to synthesize 1,1-difluorocyclopropanes using an organobismuth complex as the catalyst and TMS-CF3 as the difluorocarbene source. The reaction exhibits wide substrate scope and good robustness, generating the desired products with high selectivity. The mechanism of difluorocarbene generation and the high selectivity have been studied through experiments and theoretical calculations.
Article
Chemistry, Multidisciplinary
Sloane Evariste, Alexandra M. Harrison, Sunandan Sarkar, Arnold L. Rheingold, Barry D. Dunietz, Joachim W. Heinicke, Emalyn Delgado Rosario, Sungwoon Yoon, Thomas S. Teets, John D. Protasiewicz
Summary: 2-R-1H-1,3-Benzazaphospholes are an interesting class of heterocycles with P=C bonds. This study presents the synthesis and structural characterization of a new R-BAP (R = 2,2'-dithiophene) and compares its photoluminescence with two previously reported R-BAPs (R,R' = Me and R = 2-thiophene). The thiophene derivatives exhibit significant fluorescence, while the methyl-substituted analogue shows weak emission.
Article
Chemistry, Inorganic & Nuclear
Lihua Liu, Daniel Mendoza-Espinosa, Mauricio Quiroz-Guzman, Arnold L. Rheingold, Tracy A. Hanna, Gobinda Saha, Liming Tang, Yanhui Chen, Megan Gilbert, Abhirup Dutta, Alexandru D. Asandei
Summary: A series of methylene-bridged bisphenol ligands were synthesized and reacted with TiCl4, CpTiCl3, or Ti(OiPr)4 to form corresponding complexes, which were characterized and found to exhibit good reactivity in polymerization reactions.
Article
Chemistry, Inorganic & Nuclear
Preston M. Miura-Akagi, Timothy W. Chapp, Wesley Y. Yoshida, Glenn P. A. Yap, Arnold L. Rheingold, Russell P. Hughes, Matthew F. Cain
Summary: Dearomatization of N-Dipp-substituted benzazaphosphole 2 with HCl produced 1-Cl, which could be further substituted by halide sources to obtain the other members of the P halogenated series. Characterization of these P-heterocycles (1) was performed using multinuclear NMR spectroscopy, elemental analysis, and X-ray crystallography. The study also explored the reaction of 1-Br/I with [Pt(P(t-Bu)3)2], resulting in the formation of Pt(I)-Pt(I) dimers 4-Br/I, and the addition of 1-F to Pt(PPh3)4, leading to the coordination compound Pt(1-F)(PPh3)2.
Article
Biochemistry & Molecular Biology
Mariola Flores-Rivera, Jose Carmona-Negron, Arnold Rheingold, Enrique Melendez
Summary: 3-ferrocenyl-estra-1,3,5(10)-triene-17-one (2), [Fe(C5H5)(C24H25O3)], crystallizes in monoclinic space group C2. The Cp rings adopt a nearly eclipsed conformation, and the Cp plane is tilted with respect to the substituted phenyl plane. Weak intermolecular interactions such as C-H···π and C-H···O were analyzed. Density functional theory studies revealed a rotational barrier for the C3-O1 bond. Fluorescence quenching and in silico docking studies suggest that human serum albumin forms a complex via van der Waals and hydrogen bonding interactions.
Article
Chemistry, Inorganic & Nuclear
Emalyn Delgado Rosario, Michael F. Rectenwald, Joshua R. Gaffen, Arnold L. Rheingold, John D. Protasiewicz
Summary: The new bifunctional salts were prepared from the phosphorus(v)-containing chelating ligand H-2-DPN and characterized using various spectroscopic techniques. Both H-2-DPN and Li[B(DPN)(2)] were structurally characterized by X-ray crystallographic methods. These salts are related to materials being examined for use in electrolyte solutions for lithium-ion battery (LIB) applications.
DALTON TRANSACTIONS
(2021)
Article
Crystallography
Ryne Holmberg, Vanessa Franz, Kristen M. Moser, Ricardo Solano, Curtis Moore, Arnold L. Rheingold, Gary L. N. Smith
Summary: The title compound C29H26N4O6 has a folded conformation with the three arms on the same side of the tertiary N atom. The crystal packing features pi-pi interactions.
ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS
(2021)
