The coordination sites are two azomethine nitrogens of the hydrazone moiety and two carbonyl groups of amidic moiety; each two donors chelated one metal ion.
This mass loss corresponds to the elimination of the organic moiety and two chloride atoms, (observed weight loss, 64.01%, theoretical, 64.57%).
The MALDI-TOF MS analysis shows that each repeating unit of polymer chain consists of one unit derived from the tetrafunctional moiety and two bisphenoxy moieties exhibiting ladder structure in the polymer backbone.
The molecule, which comprises perylene at the center as the light-emitting moiety and two phenylacetylenes as the hole- and electron-transporting moieties, is designed to have localized π-MOs with an appropriate energy gradient to efficiently transport carriers at the single-molecular level.
X-ray single crystal structural analysis shows that the dihedral angles involving the difluorophenylene moiety and two pyridine rings of the 2,2′-bipyridine unit in (2Fphen-bpy)Eu DBM 3 are 42° and 51.6°, indicant of non-conjugation between the two segments.
The probes used in DSE-FRET consist of a double-stranded moiety and two single-stranded tails.
