Chemistry Letters, Vol.37, No.11, 1124-1125, 2008
Helical Twisting Power of Optically Active Spiro Compounds with a 3,3'-(4H,4' H)-Spirobi(2H-naphtho[1,2-b]pyran) Skeleton
New chiral dopants for nematic liquid crystals, containing a (S)-3,3'-(4H,4'H)-spirobi(2H-naphtho[1,2-b]pyran) skeleton, were synthesized and their helical twisting powers (HTP) were evaluated. A chiral dopant with two terphenyl structures showed the highest molar HTP value of 50.3 mu m(-1) mol(-1) kg.