Hi,
Basic MQMAS sequence consists of two pulses, the first excitation
pulse which excites the spin system to triple quantum and the spin
system is then allowed to evolve under triple quantum then a
conversion pulse which brings the system back to single quantum for
detection. The time in which the system evolves under 3Quantum that is
in between the two pulses is used as t1 for the 2D experiment.
Looking forward for some reply.
Thank you,
Mithun.