Suppression of phase anomalies and sidebands on 13c NMR spectra obtained with the steady-state free precession sequence

Quimica nova

Souza, André Alves de¹  Santos, Poliana Macedo dos²  Colnago, Luiz Alberto³ 

[1] Empresa Brasileira de Pesquisa Agropecuária, São Carlos, Brasil;Universidade de São Paulo, São Carlos;Universidade de São Paulo, São Carlos, Brasil

关键词: 13C NMR;    Steady State Free Precession;    phase anomalies and sidebands.;   

DOI  :  10.1590/S0100-40422010000400034

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The Steady-StateFree Precession (SSFP) sequence has been widely used in low-field and low-resolutionimaging NMR experiments to increase the signal-to-noise ratio (s/n) of the signals.Here, we analyzed the Scrambled Steady State - SSS and Unscrambled Steady State- USS sequences to suppress phase anomalies and sidebands of the 13CNMR spectrum acquired in the SSFP regime. The results showed that the applicationof the USS sequence allowed a uniform distribution of the time interval betweenpulses (Tp), in the established time range, allowing a greater suppressionof phase anomalies and sidebands, when compared with the SSS sequence.

【 授权许可】

CC BY