19610-33-4Relevant academic research and scientific papers
Magnetic field effect on the fluorescence of m-phenylenebis-(phenylmethylene) in a rigid glass at 77 K
Tanimoto, Yoshifumi,Akimoto, Yukimi,Fujiwara, Yoshihisa,Mukai, Masahiro,Takui, Takeji,Kinoshita, Takamasa,Itoh, Koichi
, p. 2325 - 2326 (2001)
The magnetic field effect (≤ 0.59 T) on the quintetquintet fluorescence of m-phenylenebis(phenylmethylene) (MPBP) was studied in a rigid glass, decaline-cyclohexane (3: 1) mixture, at 77K. The fluorescence decay rate of MPBP increases in a magnetic field. The effect on the MPBP fluorescence is explained in terms of the Zeeman mixing of excited quintet sublevels of MPBP.
SPIN DISTRIBUTION OF ORGANIC HIGH-SPIN MOLECULES AS STUDIED BY ENDOR/TRIPLE
Takui, Takeji,Kita, Shuichi,Ichikawa, Shinji,Teki, Yoshio,Kinoshita, Takamasa,Itoh, Koichi
, p. 67 - 76 (2007/10/02)
Single-crystal 1H-ENDOR and TRIPLE resonance spectroscopies have been applied to the first organic high-spin molecule, m-phenylenebis(phenylmethylene), 1 in its quintet ground state.Both the magnitude and absolute sign of all the proton hyperfine coupling constants have been determined from the ENDOR/TRIPLE data, yielding crucial information on the spin density distribution of its pi-electron network.The spin distribution thus determined demonstrates the important role of topological symmetry in organic high-spin molecules.Spin densities on carbon atoms of other typical high-spin molecules such as 3,4'-diphenylmethylenebis(phenylmethylene), 2 have also been determined for their ground states or low-lying excited states.Spin prediction theories have been tested in terms of the spin density distribution, showing a UHF generalized Hubbard model Hamiltonian to be appropriate for the evaluation of spin densities in macromolecules with large spins and those in organic high-spin molecules which are unit moieties of organo-magnetic materials.
