A compound characterized by a general formula, wherein X is a group described by a general formula -K p -F l - K q -, wherein - F l is -C(=O)-,-C(=S)-, with l being 0 or 1, - K p is a C p -alkyl with p being 0, 1, 2, 3 or 4, - K q is a C q -alkyl with q being 0, 1, 2, 3 or 4, and wherein n of R 1 n is 0, 1, 2, 3, 4 or 5, and each R 1 independently from any other R 1 is -C(=O)OR 2, -C(=O)NR 2 2, -C(=O)SR 2, -C(=S)OR 2, -C NR 2 2, CN 4 H 2, -NR 2 2, -C(=O)R 2, -C(=S)R 2, -OR 2, -SR 2, -CF 3, -OCF 3, -SCF 3, -SOCF 3, -SO 2 CF 3, -CN, -NO 2, -F, -Cl, -Br or -I, with each R 2 independently from any other R 2 being a hydrogen or C 1 -C 4 alkyl, and wherein OM is an organometallic compound independently selected from the group of an unsubstituted or substituted metal sandwich compound, an unsubstituted or substituted half metal sandwich compound or a metal carbonyl compound, wherein the substituent is selected or the substituents are independently from each other selected from - an unsubstituted C 1 -C 10 alkyl, an unsubstituted C 1 -C 10 alkenyl, an unsubstituted C 1 -C 10 alkynyl, an unsubstituted C 3 -C 8 cycloalkyl, an unsubstituted C 1 -C 10 alkoxy, an unsubstituted C 3 -C 8 cycloalkoxy, - an unsubstituted C 6 -C 14 aryl, - an unsubstituted 5- to 10-membered heteroaryl, wherein 1 to 4 ring atoms are independently selected from nitrogen, oxygen or sulfur, - an unsubstituted 5- to 10-membered heteroalicyclic ring, wherein 1 to 3 ring atoms are independently nitrogen, oxygen or sulfur, - -OR 3, -SR 3, -C R 3, -C R 3 -C OR 3, -C OR 3, -C SR 3, -C NR 3 R 4, -NR 3 R 4, - S 2 R 3, -S 2 OR 3 and -S 2 NR 3 R 4, wherein R 3 and R 4 are independently selected from the group consisting of hydrogen, unsubstituted C 1 -C 4 alkyl, and C 1 -C 4 alkyl substituted with C 1 -C 4 alkoxy. wherein X is a group described by a general formula -K p -F l - K q -, wherein - F l is -C(=O)-,-C(=S)-, with l being 0 or 1, - K p is a C p -alkyl with p being 0, 1, 2, 3 or 4, - K q is a C q -alkyl with q being 0, 1, 2, 3 or 4, and wherein - F l is -C(=O)-,-C(=S)-, with l being 0 or 1, - K p is a C p -alkyl with p being 0, 1, 2, 3 or 4, - K q is a C q -alkyl with q being 0, 1, 2, 3 or 4, and wherein n of R 1 n is 0, 1, 2, 3, 4 or 5, and each R 1 independently from any other R 1 is -C(=O)OR 2, -C(=O)NR 2 2, -C(=O)SR 2, -C(=S)OR 2, -C NR 2 2, CN 4 H 2, -NR 2 2, -C(=O)R 2, -C(=S)R 2, -OR 2, -SR 2, -CF 3, -OCF 3, -SCF 3, -SOCF 3, -SO 2 CF 3, -CN, -NO 2, -F, -Cl, -Br or -I, with each R 2 independently from any other R 2 being a hydrogen or C 1 -C 4 alkyl, and wherein OM is an organometallic compound independently selected from the group of an unsubstituted or substituted metal sandwich compound, an unsubstituted or substituted half metal sandwich compound or a metal carbonyl compound, wherein the substituent is selected or the substituents are independently from each other selected from - an unsubstituted C 1 -C 10 alkyl, an unsubstituted C 1 -C 10 alkenyl, an unsubstituted C 1 -C 10 alkynyl, an unsubstituted C 3 -C 8 cycloalkyl, an unsubstituted C 1 -C 10 alkoxy, an unsubstituted C 3 -C 8 cycloalkoxy, - an unsubstituted C 6 -C 14 aryl, - an unsubstituted 5- to 10-membered heteroaryl, wherein 1 to 4 ring atoms are independently selected from nitrogen, oxygen or sulfur, - an unsubstituted 5- to 10-membered heteroalicyclic ring, wherein 1 to 3 ring atoms are independently nitrogen, oxygen or sulfur, - -OR 3, -SR 3, -C R 3, -C R 3 -C OR 3, -C OR 3, -C SR 3, -C NR 3 R 4, -NR 3 R 4, - S 2 R 3, -S 2 OR 3 and -S 2 NR 3 R 4, wherein R 3 and R 4 are independently selected from the group consisting of hydrogen, unsubstituted C 1 -C 4 alkyl, and C 1 -C 4 alkyl substituted with C 1 -C 4 alkoxy. - an unsubstituted C 1 -C 10 alkyl, an unsubstituted C 1 -C 10 alkenyl, an unsubstituted C 1 -C 10 alkynyl, an unsubstituted C 3 -C 8 cycloalkyl, an unsubstituted C 1 -C 10 alkoxy, an unsubstituted C 3 -C 8 cycloalkoxy, - an unsubstituted C 6 -C 14 aryl, - an unsubstituted 5- to 10-membered heteroaryl, wherein 1 to 4 ring atoms are independently selected from nitrogen, oxygen or sulfur, - an unsubstituted 5- to 10-membered heteroalicyclic ring, wherein 1 to 3 ring atoms are independently nitrogen, oxygen or sulfur, - -OR 3, -SR 3, -C R 3, -C R 3 -C OR 3, -C OR 3, -C SR 3, -C NR 3 R 4, -NR 3 R 4, - S 2 R 3, -S 2 OR 3 and -S 2 NR 3 R 4, wherein R 3 and R 4 are independently selected from the group consisting of hydrogen, unsubstituted C 1 -C 4 alkyl, and C 1 -C 4 alkyl substituted with C 1 -C 4 alkoxy.