Twist-gram-boundary structure in the B4 phase of a bent-core molecular system identified by second harmonic generation circular dichroism measurement

Physical Review Letters

Volumn 94, Issue 13, 2005, Pages

  Araoka, Fumito ^a   Ha, N Y ^b   Kinoshita, Yoshitaka ^a   Park, Byougchoo ^a,c   Wu, J W ^b   Takezoe, Hideo ^a  

^a TOKYO INSTITUTE OF TECHNOLOGY   (Japan)

^b Ewha Womans University   (South Korea)

^c Kwangwoon University   (South Korea)

Author keywords

[No Author keywords available]

Indexed keywords

CHIRAL; CIRCULAR DICHROISM; MOLECULAR SYSTEM; SECOND HARMONIC GENERATION CIRCULAR DICHROISM (SHG CD);

COMPUTATIONAL METHODS; GRAIN BOUNDARIES; GYRATORS; IDENTIFICATION (CONTROL SYSTEMS); MOLECULAR ORIENTATION; NONLINEAR OPTICS; SECOND HARMONIC GENERATION;

MOLECULAR DYNAMICS;

EID: 18144390604     PISSN: 00319007     EISSN: 10797114     Source Type: Journal    
DOI: 10.1103/PhysRevLett.94.137801     Document Type: Article

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28. In the present experiments, P8OPIMB6* does not play an essential role as a chiral dopant but plays only a role to make chiral domains large. Actually, we confirmed that circular dichroism and optical rotation in two chiral domains give a difference in sign but not in magnitude. In this way, the present experiments are essentially those in spontaneously resolved chiral domains from achiral molecules. And also, recent EG experiments on achiral P8OPIMB without P8OPIMB6* clearly exhibit chiral NLO effect.