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Control over the chirality of (R)-1,1'-bi-2-naphthol dibenzoate in nanoparticles
Yanli Zhang1, Wensheng Yang, Zhiyuan Tian
1Key Laboratory of Photochemistry, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, PR China.
Abstract:
Nanoparticles of (R)-1,1'-bi-2-naphthol dibenzoate (R-BND) ranging from 40 to 170nm were prepared by using the reprecipitation method. The nanoparticles exhibit size-dependent exciton chirality, where the coupling potential V(12) of (1)B(b) transitions increases as nanoparticles grow and simultaneously the exciton chirality peaks exhibit the bathochromic shift. Such size-dependent optical properties can be attributed to the lattice hardening with increased particle size, which leads to a decreased dihedral angel theta between the two naphthyl planes in a R-BND molecule.
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