| abstract |
Fluorinated derivatives of the indane of the general formula (I), with the meaning of R 1 : a straight-chain or branched alkyl radical, with or without an asymmetric C atom, having 1 to 20 C atoms, where one or more nonadjacent and non-terminal CH 2 groups is represented by -O-, -CO-O-, - O-CO-, -OC (= O) O- or -Si (CH 3 ) 2 - may be replaced and one or more H atoms may be replaced by F; and R 1 can only be hydrogen when the subscript a is 1; R 2 : hydrogen or a straight-chain or branched alkyl radical (with or without asymmetric carbon atom) having 1 to 20 C atoms, wherein a non-terminal CH 2 group may be replaced by -O- and one or more H atoms F can be replaced and R 2 can only be hydrogen if the index b is 1; M 1 : -CO-O-, -O-CO-, -CH 2 -O-, -O-CH 2 -, -CH 2 CH 2 -, -C = C- or a single bond; M 2 : -CH 2 CH 2 - or a single bond; A 1 : 1,4-phenylene, in which one or two H atoms are ... |