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Long‐lived States in Multiple‐Spin Systems
Author(s) -
Ahuja Puneet,
Sarkar Riddhiman,
Vasos Paul R.,
Bodenhausen Geoffrey
Publication year - 2009
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200900335
Subject(s) - spins , excited state , relaxation (psychology) , time constant , spin (aerodynamics) , spin states , chemistry , molecule , spin crossover , atomic physics , condensed matter physics , exponential decay , exponential function , physics , quantum mechanics , thermodynamics , organic chemistry , psychology , social psychology , mathematical analysis , mathematics , engineering , electrical engineering
Long‐lived spin states are excited in molecules featuring more than two isolated coupled spins, including amino acids. The figure shows the exponential recovery with the longest time‐constant in aspartic acid, T 1 max =5.842±0.004 s, and of the decay of the long‐lived state, T LLS =10.9±0.2 s). An improvement in spin memory by a factor 2 compared to longitudinal spin‐lattice relaxation time constants is obtained for most systems.