Blatter‐Radical‐Grafted Mesoporous Silica as Prospective Nanoplatform for Spin Manipulation at Ambient Conditions

Abstract

Quantum computing and quantum information processing (QC/QIP) crucially depend on the availability of suitable quantum bits (qubits) and methods of their manipulation. Most qubit candidates known to date are not applicable at ambient conditions. Herein, we propose radical-grafted mesoporous silica as a versatile and prospective nanoplatform for spin-based QC/QIP. Extremely stable Blatter-type organic radicals are used, whose electron spin decoherence time is profoundly long even at room temperature (up to T m % 2.3 ms), thus allowing efficient spin manipulation by microwave pulses. The mesoporous structure of such composites is nuclear-spin free and provides additional opportunities of embedding guest molecules into the channels. Robustness and tunability of these materials promotes them as highly promising nanoplatforms for future QC/QIP developments.

Blatter Radical-Decorated Silica as a Prospective Adsorbent for Selective NO Capture from Air

“…After the activation, we investigated the interaction of powder samples of BTEV-BTR-SBA-15 with NO using CW EPR. Figure a shows the room-temperature EPR spectrum before the treatment, which can be simulated using spectroscopic parameters for BTRs obtained by us previously . Next, the sample was exposed to an excess of nitrogen monoxide at atmospheric pressure, whose amount corresponded to >100 NO molecules per radical (Figure b and Supporting Information).…”

“…Bis(triethoxysilylvinyl)triazinyl BTRs (BTEV-BTRs) were grafted onto SBA-15 (20 wt % of BTEV-BTRs were used) with a main pore diameter of 9.1 nm via the condensation reaction, as was described previously, 44 see also Figure 1a and the Supporting Information. The obtained material (referred to as BTEV-BTR-SBA-15) exhibits a moderate decrease of the accessible surface area after radical grafting (479 m 2 /g compared to an initial value of 701 m 2 /g of the pristine SBA-15 phase); the main pore diameter decreases to 7.6 nm (Figure S5).…”

“…In this regard, the outstanding stability of Blatter-type radicals (BTRs, 1,2,4-benzotriazin-4-yl radicals) makes them promising candidates . In particular, these radicals have been used extensively in different areas − including molecular electronics and spintronics, quantum information processing, functional materials, polarizing agents for dynamic nuclear polarization, and organic batteries, Although BTRs have never been used for targeted sorption of nitrogen oxide, some studies indicated their potential to react with NO x …”

“…All spectra are shown on the same scale. Simulation (a, right plot) used three 14 N hyperfine interaction tensors A 1 = [0.03 0.22 1.80] mT and A 2 = A 3 = [0.01 0.01 1.38] mT and the g-tensor g = [2.0043 2.0035 2.0015] obtained previously 44.…”