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Mechanochemical Synthesis of Boroxine-linked Covalent Organic Frameworks

Author(s): Hamzehpoor E; Effaty F; Borchers TH; Stein RS; Wahrhaftig-Lewis A; Ottenwaelder X; Frišcic T; Perepichka DF;

We report a rapid, room-temperature mechanochemical synthesis of 2- and 3-dimensional boroxine covalent organic frameworks (COFs), enabled by using trimethylboroxine as a dehydrating additive to overcome the hydrolytic sensitivity of boroxine-based COFs. The resulting COFs display high porosity a ...

Article GUID: 38970305


Cooperative Sensitization Upconversion in Solution Dispersions of Co-Crystal Assemblies of Mononuclear Yb3+ and Eu3+ Complexes

Author(s): Sun G; Xie Y; Wang Y; Mandl GA; Maurizio SL; Zhang H; Ottenwaelder X; Capobianco JA; Sun L;

Lanthanide upconversion luminescence in nanoparticles has prompted continuous breakthroughs in information storage, temperature sensing, and biomedical applications, among others. Achieving upconversion luminescence at the molecular scale is still a critical challenge in modern chemistry. In this ...

Article GUID: 37040148


Resonant acoustic mixing (RAM) for efficient mechanoredox catalysis without grinding or impact media

Author(s): Effaty F; Gonnet L; Koenig SG; Nagapudi K; Ottenwaelder X; Frišcic T;

Resonant acoustic mixing (RAM) enables mechanoredox catalysis with BaTiO3 as the piezoelectric catalyst on model diazonium coupling reactions. RAM proceeds without formal grinding or impact media, is faster than the analogous ball-milling strategy, and is readily scalable. X-ray diffraction and spectroscopy indicate that reusability of BaTiO3 as a mechano ...

Article GUID: 36546478


Intramolecular H-bond stabilization of a primary hydroxylamine in salen-type metal complexes

Author(s): Singh H; MacKay A; Sheibany N; Chen F; Mosser M; Rouet PÉ; Rousseau F; Askari MS; Ottenwaelder X;

Primary hydroxylamines, RNHOH, decompose readily in the presence of transition metal ions. We show that this reactivity can be arrested by ligand design via an intramolecular hydrogen bond. Six metal complexes with an intact NHOH group were synthesized and crystallographically characterized. The ...

Article GUID: 34545379


Programmed Synthesis of Tetra-Aryl Thiophenes with Stepwise, Ester-Controlled Regioselectivity

Author(s): Messina C; Ottenwaelder X; Forgione P;

Herein, we report a modular synthetic route to access tetra-arylated thiophene compounds with four different substituents with programmed chemical control provided by an ester activating/directing group. This method enables the functionalization of individual positions of thiophene sequentially via regioselective halogenations and cross-coupling reactions ...

Article GUID: 34506149


Five Nitrogen Oxidation States from Nitro to Amine: Stabilization and Reactivity of a Metastable Arylhydroxylamine Complex.

Author(s): Zsombor-Pindera J; Effaty F; Escomel L; Patrick B; Kennepohl P; Ottenwaelder X;

Redox noninnocent ligands enhance the reactivity of the metal they complex, a strategy used by metalloenzymes and in catalysis. Herein, we report a series of copper complexes with the same ligand framework, but with a pendant nitrogen group that spans five different redox states between nitro and amine. Of particular interest is the synthesis of a unprece ...

Article GUID: 33124796


Tuning Inner-Sphere Electron Transfer in a Series of Copper/Nitrosoarene Adducts.

Author(s): Askari MS, Effaty F, Gennarini F, Orio M, Le Poul N, Ottenwaelder X

Inorg Chem. 2020 Feb 19;: Authors: Askari MS, Effaty F, Gennarini F, Orio M, Le Poul N, Ottenwaelder X

Article GUID: 32073833


A bio-inspired synthesis of oxindoles by catalytic aerobic dual C-H functionalization of phenols.

Author(s): Huang Z, Askari MS, Esguerra KVN, Dai TY, Kwon O, Ottenwaelder X, Lumb JP

Chem Sci. 2016 Jan 01;7(1):358-369 Authors: Huang Z, Askari MS, Esguerra KVN, Dai TY, Kwon O, Ottenwaelder X, Lumb JP

Article GUID: 29861988


Synthesis of Highly Functionalized Triarylbismuthines by Functional Group Manipulation and Use in Palladium- and Copper-Catalyzed Arylation Reactions.

Author(s): Hébert M, Petiot P, Benoit E, Dansereau J, Ahmad T, Le Roch A, Ottenwaelder X, Gagnon A

J Org Chem. 2016 07 01;81(13):5401-16 Authors: Hébert M, Petiot P, Benoit E, Dansereau J, Ahmad T, Le Roch A, Ottenwaelder X, Gagnon A

Article GUID: 27231755


Supramolecular control of monooxygenase reactivity in a copper(ii) cryptate.

Author(s): Chaloner L, Khomutovskaya A, Thomas F, Ottenwaelder X

Dalton Trans. 2016 Jul 05;45(27):11109-19 Authors: Chaloner L, Khomutovskaya A, Thomas F, Ottenwaelder X

Article GUID: 27328176


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