24176-54-3Relevant academic research and scientific papers
Nitrogen-15 and Carbon-13 Chemical Shifts and 13C-1H, 13C-15N and 15N-15N Coupling Constants of Parasubstituted Arene Diazonium Salts
Gruner, M.,Pfeifer, D.,Becker, H.G.O.,Radeglia, R.,Epperlein, J.
, p. 63 - 79 (2007/10/02)
Nitrogen-15 and carbon-13 chemical shifts and 13C-1H, 13C-15N and 15N-15N coupling constants of 15N-enriched p-substituted arene diazonium salts are reported and within the ΔE-approximation investigated.It is shown that the changes of ΔE should be taken i
Effect of Molecular Motion and Solvent Interactions on Nitrogen-15 Relaxation in Anilines
Lambert, Joseph B.,Daniel Stec, III
, p. 301 - 307 (2007/10/02)
Dipolar relaxation of 15N in anilines and anilinium ions is influenced by overall motion of the molecule, by rotation about the aryl-nitrogen bond, by inversion of the aniline nitrogen and by interactions of the NH2 or NH3+ group with the solve
CIDNP Effects of Sensitized Photochemical Dediazoniation of Arene Diazonium Salts. Manipulating CIDNP Intensities by the Experimental Conditions
Becker, Heinz G. O.,Pfeifer, Dietmar,Radeglia, Reiner
, p. 1591 - 1597 (2007/10/02)
13C and 15N photo-CIDNP effects were determined for the reversible electron transfer from pyrene to arene diazonium salts on excitation of the charge transfer band at 360 nm.The diazonium salts being the products of back electron transfer ("cage products") show enhanced absorption for 13C(1) and the 15N-enriched diazonium group, whereas the escape products, ArH or 15N2, respectively, yield emission signals.It was shown that the intensities of the CIDNP effects depend on the rates of intersystem crossing kisc within the geminate radical pair, i.e. on the magnetic nucleus used as a probe of the CIDNP effect.Using 1H, 13C or 15N the time domain of observation can be manipulated in the ranges of 90-100 ns, 15-20 ns and 3-5 ns, respectively.Furthermore, the CIDNP intensities depend on the proper balance of the rate of electron back transfer, k-e, and the rate kp of formation of the escape product.Since k-e increases with increasing energy of the geminate radical pair, this balance and therefore the CIDNP intensities vary according to the substituent present and the electron donor used. - Keywords: Photochemistry, Dediazoniation, Electron Transfer, Chemical Induced Nuclear Polarization (CIDNP), Arene Diazonium Salts
