2008年8月1日 · A remarkable enhancement of sensitivity can be often achieved in 29 Si solid-state NMR by applying the well-known Carr–Purcell–Meiboom–Gill (CPMG) train of rotor-synchronized π pulses during the detection of silicon magnetization. Here, several one- and two-dimensional (1D and 2D) techniques are used to demonstrate the capabilities of ...

2002年5月17日 · The reduction of experiment time for the 29 Si experiments points at the (Q)CPMG-MAS experiment as a general acquisition approach not only to broader lineshapes obtained for half-integer quadrupolar nuclei but also to …

cpmg可以抑制无定形二氧化硅衍生的信号，这得益于29倍石英中t 2的极长弛豫时间si并因此大大提高了灵敏度。 利用已知的CPMG小尖峰频率进行的专用后处理可探测100％商业化二氧化硅样品中石英几乎不存在的情况，从而能够评估未知样品是否符合欧盟法规（REACH）。

A remarkable enhancement of sensitivity can be often achieved in 29Si solid-state NMR by applying the well-known Carr-Purcell-Meiboom-Gill (CPMG) train of rotor-synchronized pi pulses during the detection of silicon magnetization. Here, several one- and two-dimensional (1D and 2D) techniques are use …

2019年8月1日 · The sensitivity of SP, UDEFT and CPMG (Carr-Purcell-Meiboom-Gill) techniques are experimentally compared on functionalized and non-functionalized mesoporous silica. Furthermore, experiments on a flame retardant material prove that UDEFT technique provides a better quantification of 29 Si sites with higher sensitivity than SP method.

2018年7月4日 · The development of multi-dimensional statistical methods has been demonstrated on variable contact time (VCT) 29Si{1H} cross-polarization magic angle spinning (CP/MAS) data sets collected using Carr-Purcell-Meiboom-Gill (CPMG) type acquisition. These methods utilize the transformation of the collect …

2002年5月1日 · A significantly reduced experiment time for half-integer nuclei with long T1 relaxation times has been demonstrated by 29Si CPMG-MAS or 17O QCPMG-MAS experiments on α-cristobalite, a radiation...

Dynamic nuclear polarization (DNP) 29Si solid-state NMR spectra of a hybrid mesoporous silica material impregnated with aqueous biradical solutions have been acquired with cross-polarization (CP) and cross-polarization Carr–Purcell Meiboom–Gill (CP/CPMG) pulse sequences.

2018年6月20日 · The development of multi-dimensional statistical methods has been demonstrated on variable contact time (VCT) 29Si{1H} cross-polarization magic angle spinning (CP/MAS) data sets collected using Carr–Purcell–Meiboom–Gill (CPMG) type acquisition.

2008年6月1日 · A remarkable enhancement of sensitivity can be often achieved in 29Si solid-state NMR by applying the well-known Carr-Purcell-Meiboom-Gill (CPMG) train of rotor-synchronized pi pulses during...