Sensitivity enhancement in ²⁹Si solid-state NMR by CPMG; Application to ²⁹Si-¹ HETCOR and ²⁹Si DQMAS

Carr-Purcell-Meiboom-Gill (CPMG) pulse sequence generates a train of echoes which can be summed up, resulting in a great sensitivity enhancement in ²⁹Si NMR. This approach is very effective not only in 1D measurements but also in 2D experiments. The conventional ²⁹Si acquisition in 2D experiments can be replaced by the train of CPMG echoes. This results in 3 to 10 times sensitivity enhancement which corresponds to measurement time reduction of one to two orders of magnitude.

JNM-ECA600 with 3.2 mm HXMAS probe at 20 kHz MAS. Sample: zeolite sigma-2 (SGT)

Sample courtesy of

Prof. Toshiyuki Yokoi of Tokyo Institute of Technology

Reference

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