I recorded an DQF on deuterated solid sample. The basic pulse programme taken from bruker, optimised the pulse and kept the proper short delay between the last two 90 pulses? phase cycling is same as mentioned in bruker? I got empty spectrum with very poor diagonal and no cross peaks?
what could possibly go wrong ? does these delays depend on higher magnetic field strengths? or pulse imperfections cause collapsed spectrum or empty spectrum?
the spectra i recorded on 700 MHz with 14 KHz MAS.
regards
anup
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