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Abstract
Absolute configurations of methylnaphthylphenyl-substituted oligosilanes, MeNpPhSi*SiMeR(1)R(2) [2 (R(1), R(2)=Me), 3 (R(1)=Me, R(2)=Ph), 4 (R(1), R(2)=Ph), and 5 (R(1)=Me, R(2)=SiMe(3))] were predicted by circular dichroism (CD) exciton chirality method. The sigma-pi conjugation effect of oligosilylene units (sigma-linkage) with pi-electron systems caused an intense red-shift of (1)L(a,Ph) transition band of the oligosilanes as shown in UV/VIS and made it possible to observe clear CD exciton chirality between the two aromatic chromophores on chiral silicon atom.
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