Magnetic properties of copper as a constituent of nanobridges formed between spatially fixed deoxyribonucleic acid molecules

DNA Liquid-Crystalline Dispersion Particles as a Platform for Creation of “RIGID” Spatial Structures

“…The direct magnetometric estimation of Cu 2+ cations [60] in the content of ds DNA CLCD particles demonstrated that one nanobridge between ds DNA molecules fixed in the content of CLCD particles formed at C PEG = 170 mg/ml can contain from four to six copper ions. (The calculation of the number of Cu 2+ ions in the content of the nanobridges is based on the measurement of the magnetic susceptibility (magnetic moment) of a Cu 2+ ion being in the d 9 state with four reactive oxygen atoms at the nanobridge formation [46] Fig.…”

“…The positive abnormal band in the CD spectrum demonstrates that the right-handed ds poly(I)poly(C) molecules (A-family) form the CLCD with right-handed spatial twist [3,14,60].…”

Quantum effects and magnetism in the spatially distributed DNA molecules

“…As a result of formation of nanobridges between the neighboring DNA molecules, nanoconstructions with fixed two-and three-dimensional spatial structures can occur [34,35]. One can suppose that all the copper ions are participating in the formation of nanobridges within nanoconstructions.…”

“…In particular, copper ions are nondestructive markers suitable for EPR control (in particular, of transport in cells). The incorporation of copper ion Cu Each nanobridge is consisting of six Cu 2+ ions (dark spots) and five DAU molecules [34,35] It is known that DNA molecules form a cholesteric phase possessing high conductivity and self-organization [35]. This phase may be the basis for the construction of organometallic complexes.…”

“…A particular attention should be paid to magnetism of Cudoped DNA systems [34,35,33,36]. In particular, copper ions are nondestructive markers suitable for EPR control (in particular, of transport in cells).…”