During conjugation, a temporary union between two cells, the conjugants acquire new micronuclei through recombination and reciprocal fertilization, and in the process become genetically identical.
In fact, the high torsional angle granted by the 1,1' connectivity results both in an energy barrier high enough to yield permanently stable enantiomers at room temperature, and in low effective conjugation between the two moieties, affording a very large operating window.
In order to check whether altering the electronic conjugation between these two units causes reduction in the extent of sensitization, we have synthesized a pyridinyloxy-fluorescein dye PyFlEt and attached it to two designed ruthenium nitrosyls through the pyridine-N donor of the pyridinyloxy-end.
As described above, the Au Au interaction in 8 twists the P=C unit out of the phosphole plane and thereby breaks effective conjugation between the two chromophores, which explains the hypsochromic shift that is observed in the UV/Vis spectrum of 8.
In the monomer a branching of the carbazole conjugation occurs through N-linked, conjugated bridge between two carbazole units.
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.
A new concept, "interfacial conjugation", is introduced to reflect the capacitance enhancement resulting from π π stacking interactions at the interface between two materials with highly conjugated chemical bonds.
The short acetylenic bond of APD retains the π conjugation required for fluorescence properties and maintains a spacing between two purines that is close to the size of a hydrogen bond in a G-quartet.
These organisms, however, may also reproduce by means of conjugation, in which cross-fertilization is achieved by the exchange of genetic material across a cytoplasmic bridge between two individuals.
Gutzler, R. & Perepichka, D. F. π-Electron conjugation in two dimensions.
