Product Operator Formalism for Spin Systems with Magnetic Equivalence in FT NMR Experiment Ⅲ. analysis of Spin topology.filtration experiment

Basing on thc results in a prcvious paper, universal analytical expressions for Multiple Quantum Coherence Product Operators（MQCPO） evolving under the influence of Hamiltonian were derived for weakly coupled spin systems with magnetic equivalence. A set of linear relationships between MQCPO and SAPO, which suited for analysis of multiple quantum filtration experiment, were given. Some pulse sequences designed for spin topology experiment were analized with the SAPO+MQCPO method as well as graph theory. The results showed the modified formalisms being simple in analysis and revealing better physical insight into the procedure.