Research output: Contribution to journal › Article › peer-review
Proton Relaxometry of Long-Lived Spin Order. / Kiryutin, Alexey S.; Panov, Mikhail S.; Yurkovskaya, Alexandra V. et al.
In: ChemPhysChem, Vol. 20, No. 5, 04.03.2019, p. 766-772.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Proton Relaxometry of Long-Lived Spin Order
AU - Kiryutin, Alexey S.
AU - Panov, Mikhail S.
AU - Yurkovskaya, Alexandra V.
AU - Ivanov, Konstantin L.
AU - Bodenhausen, Geoffrey
N1 - Publisher Copyright: © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/3/4
Y1 - 2019/3/4
N2 - A study of long-lived spin order in chlorothiophene carboxylates at both high and low magnetic fields is presented. Careful sample preparation (removal of dissolved oxygen in solution, chelating of paramagnetic impurities, reduction of convection) allows one to obtain very long-lived singlet order of the two coupled protons in chlorothiophene derivatives, having lifetimes of about 130 s in D2O and 240 s in deuterated methanol, which are much longer than the T1-relaxation times (18 and 30 s, respectively, at a field (Formula presented.) =9.4 T). In protonated solvents the relaxation times become shorter, but the lifetime is still substantially longer than (Formula presented.). In addition, long-lived coherences are shown to have lifetimes as long as 30 s. Thiophene derivatives can be used as molecular tags to study slow transport, slow dynamics and slow chemical processes, as has been shown in recent years.
AB - A study of long-lived spin order in chlorothiophene carboxylates at both high and low magnetic fields is presented. Careful sample preparation (removal of dissolved oxygen in solution, chelating of paramagnetic impurities, reduction of convection) allows one to obtain very long-lived singlet order of the two coupled protons in chlorothiophene derivatives, having lifetimes of about 130 s in D2O and 240 s in deuterated methanol, which are much longer than the T1-relaxation times (18 and 30 s, respectively, at a field (Formula presented.) =9.4 T). In protonated solvents the relaxation times become shorter, but the lifetime is still substantially longer than (Formula presented.). In addition, long-lived coherences are shown to have lifetimes as long as 30 s. Thiophene derivatives can be used as molecular tags to study slow transport, slow dynamics and slow chemical processes, as has been shown in recent years.
KW - field dependence
KW - kinetics
KW - long-lived states
KW - magnetic properties
KW - relaxometry
KW - SLOW DIFFUSION
KW - PARA-HYDROGEN
KW - FIELD
KW - DIFFUSION-COEFFICIENTS
KW - RELAXATION
KW - SINGLET-STATES
KW - LEVEL ANTI-CROSSINGS
KW - NMR
KW - MAGNETIC-RESONANCE
KW - POLARIZATION
UR - http://www.scopus.com/inward/record.url?scp=85061255935&partnerID=8YFLogxK
U2 - 10.1002/cphc.201800960
DO - 10.1002/cphc.201800960
M3 - Article
C2 - 30600920
AN - SCOPUS:85061255935
VL - 20
SP - 766
EP - 772
JO - ChemPhysChem
JF - ChemPhysChem
SN - 1439-4235
IS - 5
ER -
ID: 18485202