The di-radical (DR) that has an open-shell ground-state singlet, and an excited-state triplet, with a rather small energy gap between, has shown its outstanding performance in achieving room temperature spintronic devices, due to the fact that the triplet which is critical to the device performance can be thermally activated. In order to understand the molecular spin, microscopic study on the electronic structures of the DR molecule materials can provide significant insight. Since muons can probe the excited electronic structure of the close-shell molecule, we plan to use the same method with DR molecules to obtain microscopic insight that conventional magnetic resonance techniques may not give. Prior to study on the excited state of the DR, we propose here to obtain a standard ground state study with muon spectroscopy first, to promote efficiency and reliability of the investigation.