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Start Over Author "Twamley, Brendan" Journal angewandte chemie
17 results on '"Twamley, Brendan"'

1. A Heterometallic Porphyrin Dimer as a Potential Quantum Gate: Magneto‐Structural Correlations and Spin Coherence Properties

Author

Ranieri, Davide, primary, Privitera, Alberto, additional, Santanni, Fabio, additional, Urbanska, Karolina, additional, Strachan, Grant J., additional, Twamley, Brendan, additional, Salvadori, Enrico, additional, Liao, Yu‐Kai, additional, Chiesa, Mario, additional, Senge, Mathias O., additional, Totti, Federico, additional, Sorace, Lorenzo, additional, and Sessoli, Roberta, additional

Published
2023
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5. Iridium(III) Complexes Bearing Pyrene-Functionalized 1,10-Phenanthroline Ligands as Highly Efficient Sensitizers for Triplet-Triplet Annihilation Upconversion

Author

Lu, Yue, primary, Wang, Junsi, additional, McGoldrick, Niamh, additional, Cui, Xiaoneng, additional, Zhao, Jianzhang, additional, Caverly, Colin, additional, Twamley, Brendan, additional, Ó Máille, Gearoid M., additional, Irwin, Bryan, additional, Conway-Kenny, Robert, additional, and Draper, Sylvia M., additional

Published
2016
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6. Mimicking Class I b Mn2‐Ribonucleotide Reductase: A MnII2 Complex and Its Reaction with Superoxide.

Author

Magherusan, Adriana M., García‐Melchor, Max, Twamley, Brendan, McDonald, Aidan R., Zhou, Ang, Que, Jr., Lawrence, and Farquhar, Erik R.

Subjects
RIBONUCLEOSIDE diphosphate reductase, SUPEROXIDES, MANGANESE, CHEMICAL synthesis, OXIDATION
Abstract

Abstract: A fascinating discovery in the chemistry of ribonucleotide reductases (RNRs) has been the identification of a dimanganese (Mn2) active site in class I b RNRs that requires superoxide anion (O2.−), rather than dioxygen (O2), to access a high‐valent Mn2 oxidant. Complex 1 ([Mn2(O2CCH3)(N‐Et‐HPTB)](ClO4)2, N‐Et‐HPTB=N,N,N′,N′‐tetrakis(2‐(1‐ethylbenzimidazolyl))‐2‐hydroxy‐1,3‐diaminopropane) was synthesised in high yield (90 %). 1 was reacted with O2.− at −40 °C resulting in the formation of a metastable species (2). 2 displayed electronic absorption features (λmax=460, 610 nm) typical of a Mn‐peroxide species and a 29‐line EPR signal typical of a MnIIMnIII entity. Mn K‐edge X‐ray absorption near‐edge spectroscopy (XANES) suggested a formal oxidation state change of MnII2 in 1 to MnIIMnIII for 2. Electrospray ionisation mass spectrometry (ESI‐MS) suggested 2 to be a MnIIMnIII‐peroxide complex. 2 was capable of oxidizing ferrocene and weak O−H bonds upon activation with proton donors. Our findings provide support for the postulated mechanism of O2.− activation at class I b Mn2 RNRs. [ABSTRACT FROM AUTHOR]

Published
2018
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15. Activation of the CF Bond: Transformation of CF3NN into 5AzidotetrazolesThe financial support of the NSF Grant CHE0315275, ONR Grant N000140210600, and DTRA HDTRA 10710024 is gratefully acknowledged. The Bruker Siemens SMART APEX diffraction facility was established at the University of Idaho with the assistance of the NSFEPSCoR program and the M.J. Murdock Charitable Trust, Vancouver, WA USA

Author

Abe, Takashi, Tao, GuoHong, Joo, YoungHyuk, Huang, Yangen, Twamley, Brendan, and Shreeve, JeanneM.

Abstract

No Abstract

Published
2008
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