Reactive mesogens

A compound of formula I,

• wherein
• P is a polymerizable group,
• Sp is a spacer group or a single bond,
• R11 is P-Sp or a methoxy, ethyl, ethoxy, propyl, isopropyl, propyloxy, isopropyloxy, or straight-chain or branched butyl or butyloxy,
• A, B, D, and E denote, in case of multiple occurrence independently of one another an alicyclic, heterocyclic, aromatic or heteroaromatic group with 4 to 20 ring atoms, which is monocyclic or polycyclic and which is optionally substituted by one or more P-Sp-, and ring D may also denote a single bond, wherein one or both of ring B and ring D denote a 2,6-naphthalene radical which is optionally substituted by one or more groups L,
• L of the 2,6-naphthalene radical each, independently of one another, denotes an alkyl, alkoxy, or thioalkyl having 1 to 6 C atoms, P-Sp-, —CN, F, Cl, OCF3, CF3, CH2F, or CHF2, or two substituents L that are connected to directly adjacent C atoms may also form a cyclic group with 5, 6, 7, or 8 C atoms,
• C denotes a benzene-1,4-diyl which is substituted by one or more ethyl groups,
• M denotes CH2, C(CH3)2, CHF, CF2, NH, S, or O,
• Z11, Z12 denotes, in case of multiple occurrences independently of one another, —O—, —S—, —CO—, —COO—, —OCO—, —S—CO—, —CO—S—, —O—COO—, —CO—NR0—, —NR0—CO—, —NR0—CO—NR00, —NR0—CO—O—, —O—CO—NR0—, —OCH2—, —CH2O—, —SCH2—, —CH2S—, —CF2O—, —OCF2—, —CF2S—, —SCF2—, —CH2CH2—, —(CH2)n1, —CF2CH2—, —CH2CF2—, —CF2CF2—, —CH═N—, —N═CH—, —N═N—, —CH═CR0—, —CY1═CY2—, —C≡C—, —CH═CH—COO—, —OCO—CH═CH—, or a single bond,
• n1 is 1, 2, 3, or 4,
• r denotes 0, 1, 2, 3, or 4,
• s denotes 0, 1, 2, or 3,
• t denotes 0, 1, or 2,
• R0, R00 denote H or an alkyl having 1 to 12 C atoms,
• Y1, Y2 independently of each other denote H, F, Cl, NCS, or CN,
• n is 0, and
• m is 0.