Structure and Bonding in Fluorinated Nanodiamond

Abstract

We report on a combined investigation of the structure and chemical bonding in fluorinated detonation nanodiamond by means of nuclear magnetic resonance, electron paramagnetic resonance, X-ray photoelectron spectroscopy, and Raman measurements. The results of these methods are found to be consistent with each other and evidence formation of different fluorocarbon groups on the nanodiamond surface, which substitutes for hydrocarbon and hydroxyl groups. The data obtained provide detailed information about the structure and bonding in the fluorinated diamond nanoparticle. The fluorinated sample has a significant number of paramagnetic defects (∼10 20 spin/g) located mainly near the surface of the diamond nanoparticle, resulting in fast 19 F and 13 C nuclear spin-lattice relaxation.

Paramagnetic centers in detonation nanodiamonds studied by CW and pulse EPR

“…3, spectra 1 and 2) prevented to detect it. The problem was how to simulate [44] and subsequently subtract this broad line to see the spectrum of P1-centers. We have found that fitting of the broad line by the mixed Lorentz + Gauss derivative line (XEPR software) gave good results ( Figure 3, spectra 1' and 2').…”

Multifunctional nanodiamonds in regenerative medicine: Recent advances and future directions

“…A possible alternative is the fluorination of the surface using a gas mixture of F 2/ /H 2 at elevated temperatures or using plasma treatment [59]. The presence of fluorine atoms enables for further substitutions with alkaline reagents such as amines and Grignard’s reagents.…”

Dipole polarizability of nanodiamonds and related structures

“…As fluorinated and hydroxylated NDs are experimentally studied [11,12,14], we have proposed several types of NDs, derived from the aforementioned C 197 H 160 nanostructure and coated with F atoms or OH groups. The modified NDs with only one carbon atom functionalized by two groups were used for auxiliary calculations.…”

“…This causes diversity of their applications: as additives in polymer composites [4], platforms for drug delivery [5], fluorescent markers for biomedical applications [6], materials for solar cells [7] and electronic devices (see also reviews, considered on the applications [2,3,8,9]). In addition to the production strategies, physicochemical properties of NDs may be tuned by surface modifications [10][11][12][13][14][15][16][17], so NDs are chemically functionalized in many ways by coating with hydrogen [11,14,16], fluorine atoms [11,12], or hydroxyl groups [14,17]. Another way of changing the ND properties comes from the inside, viz.…”