24176-53-2Relevant academic research and scientific papers
Formation of Protonated ortho-Quinonimide from ortho-Iodoaniline in the Gas Phase by a Molecular-Oxygen-Mediated, ortho-Isomer-Specific Fragmentation Mechanism
Errabelli, Ramu,Zheng, Zhaoyu,Attygalle, Athula B.
, p. 864 - 872 (2020)
Upon collisional activation under mass spectrometric conditions, protonated 2-, 3-, and 4-iodoanilines lose an iodine radical to generate primarily dehydroanilinium radical cations (m/z 93), which are the distonic counterparts of the conventional molecula
Regular Two-Dimensional Arrays of Surface-Mounted Molecular Switches: Switching Monitored by UV-vis and NMR Spectroscopy
Santos Hurtado, Carina,Bastien, Guillaume,Ma?át, Milan,?to?ek, Jakub Radek,Dra?ínsky, Martin,Ron?evi?, Igor,Císa?ová, Ivana,Rogers, Charles T.,Kaleta, Ji?í
, p. 9337 - 9351 (2020/06/27)
Using solid-state 15N NMR spectroscopy, the cis/trans isomerization in a two-dimensional (2-D) array of surface-mounted azobenzene-based switches was detected for the first time. In order to achieve this, a new class of rod-shaped molecular switches, suit
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
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
