A compound 1 defined by Formula 1a in which: X 1 and X 2 are an anionic ligand independently selected from group encompassing halogen anion, the groups - CN, -SCN, -OR', -SR', -O(C=O)R', -O(SO 2 )R', and -OSi(R') 3 , where R' is C 1 -C 12 alkyl, C 3 -C 12 cycloalkyl, C 2 -C 12 alkenyl, or C 5 -C 20 aryl, which optionally may be substituted with at least one C 1 -C 12 alkyl, C 1 -C 12 perfluoroalkyl, C 1 -C 12 alkoxyl, C 5 -C 24 aryloxyl, C 5 -C 20 heteroaryloxyl, or halogen atom; R 1 is heteroaryl group; R 2 , R 3 , R 4 , R 5 , and R 6 independently of one another are hydrogen atom, C 1 -C 25 alkyl group, C 1 -C 25 alkoxyl group, or C 2 -C 25 alkenyl group, wherein the groups R 2 , R 3 , R 4 , R 5 and R 6 may be mutually connected into ring that form substituted or unsubstituted C 4 -C 10 cyclic or C 4 -C 12 polycyclic structure; R 7 , R 8 , R 9 , and R 10 independently of one another are hydrogen atom, or C 1 -C 25 alkyl group, R 7 and/or R 8 may be connected with R 9 and/or R 10 , to form a cycle; n is 0 or 1; R 13 , R 14 , R 15 , R 16 , R 17 , R 18 , R 19 , R 20 , R 21 , and R 22 independently of one another are hydrogen atom, halogen atom, C 1 -C 25 alkyl, C 1 -C 25 alkylamino, C 1 -C 25 alkylammonium, C 1 -C 25 perfluoroalkyl, C 2 -C 25 alkenyl, C 3 -C 7 cycloalkyl, C 3 -C 25 cycloalkenyl, C 2 -C 25 alkynyl, C 3 -C 25 cycloalkynyl, C 1 -C 25 alkoxyl, C 5 -C 24 aryl, C 5 -C 20 heteroaryl, C 3 -C 12 heterocycle, 3-12 membered heterocycle, a thioether (-SR'), an ester (-COOR'), an amide (-CONR' 2 ), a sulphone (-SO 2 R'), a sulphonamide (-SO 2 NR' 2 ), or a ketone (-COR'), in which group R' is C 1 -C 5 alkyl, C 1 -C 5 perfluoroalkyl, C 5 -C 25 aryl, or C 5 -C 25 perfluoroaryl. X 1 and X 2 are an anionic ligand independently selected from group encompassing halogen anion, the groups - CN, -SCN, -OR', -SR', -O(C=O)R', -O(SO 2 )R', and -OSi(R') 3 , where R' is C 1 -C 12 alkyl, C 3 -C 12 cycloalkyl, C 2 -C 12 alkenyl, or C 5 -C 20 aryl, which optionally may be substituted with at least one C 1 -C 12 alkyl, C 1 -C 12 perfluoroalkyl, C 1 -C 12 alkoxyl, C 5 -C 24 aryloxyl, C 5 -C 20 heteroaryloxyl, or halogen atom; R 1 is heteroaryl group; R 2 , R 3 , R 4 , R 5 , and R 6 independently of one another are hydrogen atom, C 1 -C 25 alkyl group, C 1 -C 25 alkoxyl group, or C 2 -C 25 alkenyl group, wherein the groups R 2 , R 3 , R 4 , R 5 and R 6 may be mutually connected into ring that form substituted or unsubstituted C 4 -C 10 cyclic or C 4 -C 12 polycyclic structure; R 7 , R 8 , R 9 , and R 10 independently of one another are hydrogen atom, or C 1 -C 25 alkyl group, R 7 and/or R 8 may be connected with R 9 and/or R 10 , to form a cycle; n is 0 or 1; R 13 , R 14 , R 15 , R 16 , R 17 , R 18 , R 19 , R 20 , R 21 , and R 22 independently of one another are hydrogen atom, halogen atom, C 1 -C 25 alkyl, C 1 -C 25 alkylamino, C 1 -C 25 alkylammonium, C 1 -C 25 perfluoroalkyl, C 2 -C 25 alkenyl, C 3 -C 7 cycloalkyl, C 3 -C 25 cycloalkenyl, C 2 -C 25 alkynyl, C 3 -C 25 cycloalkynyl, C 1 -C 25 alkoxyl, C 5 -C 24 aryl, C 5 -C 20 heteroaryl, C 3 -C 12 heterocycle, 3-12 membered heterocycle, a thioether (-SR'), an ester (-COOR'), an amide (-CONR' 2 ), a sulphone (-SO 2 R'), a sulphonamide (-SO 2 NR' 2 ), or a ketone (-COR'), in which group R' is C 1 -C 5 alkyl, C 1 -C 5 perfluoroalkyl, C 5 -C 25 aryl, or C 5 -C 25 perfluoroaryl. <EOS>