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1. [Ru ^II (tpy)(bpy)Cl] ⁺ -Catalyzed reduction of carbon dioxide. Mechanistic insights by carbon-13 kinetic isotope effects

   https://doi.org/10.1039/C8CC03009J  

   Schneider, T. W.; Hren, M. T.; Ertem, M. Z.; Angeles-Boza, A. M. (January 2018, Chemical Communications)

   In this work, we examine the use of competitive 13 C kinetic isotope effects ( 13 C KIEs) on CO 2 reduction reactions that produce CO and formic acid as a means to formulate reaction mechanisms. The findings reported here mark a further advancement in the combined 13 C KIE measurements and theoretical calculations methodology for probing CO 2 conversion reactions. 

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2. Oxidative Additions to Ti(IV) in [(dadi) ^4– ]Ti ^IV (THF) Involve Carbon–Carbon Bond Formation and Redox-Noninnocent Behavior

   https://doi.org/10.1021/acs.organomet.8b00930  

   Heins, Spencer P.; Zhang, Bufan; MacMillan, Samantha N.; Cundari, Thomas R.; Wolczanski, Peter T. (March 2019, Organometallics)
3. Cobalt‐Catalyzed Allylic Alkylation at sp ³ ‐Carbon Centers

   https://doi.org/10.1002/chem.202401707  

   Joseph, Ebbin; Tunge, Jon_A (August 2024, Chemistry – A European Journal)

   Abstract The rising demand and financial costs of noble transition metal catalysts have emphasized the need for sustainable catalytic approaches. Over the past few years, base‐metal catalysts have emerged as ideal candidates to replace their noble‐metal counterparts because of their abundance and easiness of handling. Despite the significant advancements achieved with precious transition metals, earth‐abundant cobalt catalysts have emerged as efficient alternatives for allylic substitution reactions. In this review, allylic alkylations at sp³‐carbon centers mediated by cobalt will be discussed, with a special focus on the mechanistic features, scope, and limitations. 

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4. Programming sp ³ Quantum Defects along Carbon Nanotubes with Halogenated DNA

   https://doi.org/10.1021/jacs.3c14784  

   Wu, Xiaojian; Kim, Mijin; Wang, Lucy J; Veetil, Abhindev Kizhakke; Wang, YuHuang (April 2024, Journal of the American Chemical Society)

   Atomic defect color centers in solid-state systems hold immense potential to advance various quantum technologies. However, the fabrication of high-quality, densely packed defects presents a significant challenge. Herein we introduce a DNA-programmable photochemical approach for creating organic color-center quantum defects on semiconducting single-walled carbon nanotubes (SWCNTs). Key to this precision defect chemistry is the strategic substitution of thymine with halogenated uracil in DNA strands that are orderly wrapped around the nanotube. Photochemical activation of the reactive uracil initiates the formation of sp3 defects along the nanotube as deep exciton traps, with a pronounced photoluminescence shift from the nanotube band gap emission (by 191 meV for (6,5)-SWCNTs). Furthermore, by altering the DNA spacers, we achieve systematic control over the defect placements along the nanotube. This method, bridging advanced molecular chemistry with quantum materials science, marks a crucial step in crafting quantum defects for critical applications in quantum information science, imaging, and sensing. 

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5. Low-Temperature Single Carbon Nanotube Spectroscopy of sp ³ Quantum Defects

   https://doi.org/10.1021/acsnano.7b03022  

   He, Xiaowei; Gifford, Brendan J.; Hartmann, Nicolai F.; Ihly, Rachelle; Ma, Xuedan; Kilina, Svetlana V.; Luo, Yue; Shayan, Kamran; Strauf, Stefan; Blackburn, Jeffrey L.; et al (September 2017, ACS Nano)