Scheme for 2D pulse sequences and experiments Preparation Evolution Mixing Acquisition t The first perturbation of the system(pulse)was called the preparation of the spin system The variable te is called the evolution time, tr We have a mixing event, in which information from one part of the spin system is relayed to other parts. Finally, we have an acquisition period (t2)as with all ID experiments THMMRScheme for 2D pulse sequences and experiments Preparation Evolution Acquisition t1 t2 Mixing THNMR YAN • The first perturbation of the system (pulse) was called the preparation of the spin system. • The variable tE is called the evolution time, t1 . • We have a mixing event, in which information from one part of the spin system is relayed to other parts. • Finally, we have an acquisition period (t2 ) as with all 1D experiments