title: Mirror-symmetry-breaking in poly[(9,9-di-n-octylfluorenyl- 2,7-diyl)-alt-biphenyl] (PF8P2) is susceptible to terpene chirality, achiral solvents, and mechanical stirring.
abstract: Solvent chirality transfer of (S)-/(R)-limonenes allows the instant generation of optically active PF8P2 aggregates with distinct circular dichroism (CD)/circularly polarized luminescence (CPL) amplitudes with a high quantum yield of 16-20%. The present paper also reports subtle mirror-symmetry-breaking effects in CD-/CPL-amplitude and sign, CD/UV-vis spectral wavelengths, and photodynamics of the aggregates, though the reasons for the anomaly are unsolved. However, these photophysical properties depend on (i) the chemical natures of chiral and achiral molecules when used in solvent quantity, (ii) clockwise and counterclockwise stirring operations, and (iii) the order of addition of limonene and methanol to the chloroform solution.
authors.affiliation: Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan. fujikim@ms.naist.jp
authors.forename: Michiya
authors.initials: M
authors.lastname: Fujiki
authors.forename: Yoshifumi
authors.initials: Y
authors.lastname: Kawagoe
authors.forename: Yoko
authors.initials: Y
authors.lastname: Nakano
authors.forename: Ayako
authors.initials: A
authors.lastname: Nakao
mesh_terms: D001713:Biphenyl Compounds / Q000737:chemistry*; D053138:Cyclohexenes / Q000737:chemistry; D005449:Fluorenes / Q000737:chemistry*; D000077222:Limonene; D049449:Luminescence; D055595:Mechanical Phenomena; D000432:Methanol / Q000737:chemistry; D015394:Molecular Structure; D011108:Polymers / Q000032:analysis / Q000737:chemistry; D012996:Solutions / Q000737:chemistry; D012997:Solvents / Q000032:analysis / Q000737:chemistry*; D013696:Temperature; D013729:Terpenes / Q000032:analysis / Q000737:chemistry*
chemical_list: D001713:Biphenyl Compounds; D053138:Cyclohexenes; D005449:Fluorenes; D011108:Polymers; D012996:Solutions; D012997:Solvents; D013729:Terpenes; D000077222:Limonene; D000432:Methanol