Full Definitions:    Ar1,Ar2=phenyl, pyridyl, pyrimidyl, triazinyl or naphthyl (all optionally substituted by 1-10C alkyl,3-10C cycloalkyl or 1-10C alkoxy (all optionally substituted), H, D, halo, CN, Si(CH3)3, CF3 or nitro);    or Ar1+Ar2=3-5C cycloalkyl;    or Ar1+Ar2+C=spiro structure;    R1-R4=1-40C alkyl, 5-40C aryl, 4-40C heteroaryl, 3-40C cycloalkyl or heterocycloalkyl 3-40C alkyl (all optionally substituted by D, halo, CN, Si(CH3)3, CF3, nitro, optionally substituted 1-10C alkyl, optionally substituted 3-10C cycloalkyl or optionally substituted 1-10C alkoxy), H, D, halo, CN, Si(CH3)3, CF3 or nitro;    Z=1-5C alkyl or 2-5C alkenyl (both optionally substituted by 1-40C alkyl, 5-40C aryl, 4-40C heteroaryl or 3-40C cycloalkyl), single bond, Si(CH3)2 or 2-amino;    R5,R6=1-40C alkyl, 2-40C alkenyl, 5-40C aryl, 6-40C arylalkyl, 5-40C heteroaryl, 3-40C cycloalkyl or 3-40C heterocycloalkyl (all optionally substituted by H, halo, CN, Si(CH3)3, CF3, nitro, optionally substituted 1-10C alkyl, optionally substituted 3-10C cycloalkyl, optionally substituted 1-10C alkoxy, phenyl, pyridyl, pyridinyl, naphthyl, dibenzo furanoid, dibenzo thiophenyl or anthracenyl (all optionally substituted by 10-10C alkyl)) (when z exists), or R5,R6=2-40C alkylene, 5-40C aryl, 6-40C aralkyl, 5-40C heteroaryl,3-40C cycloalkyl or 3-40C heterocycloalkyl (all optionally substituted by 1-10C alkyl), or optionally substituted 1-40C alkyl (all optionally substituted by H, halo, CN, Si(CH3)3, CF3, nitro, optionally substituted 1-10C alkyl, optionally substituted 3-10C cycloalkyl, optionally substituted 1-10C alkoxy, phenyl, pyridyl, pyridinyl, naphthyl, dibenzo furanoid, dibenzo thiophenyl or anthracenyl (all optionally substituted by 10-10C alkyl)) (when z does not exist);    or hetero atom of R5+C or R6+C adjacent to linker attached through pyrenyl structure X or R5+R6+C+X=single bond, 1-40C alkyl, 5-40C aryl, optionally substituted 5-40C heteroaryl optionally substituted fused 5-6-membered ring;    X=N(Y1) or C(Y2)(Y3);and    Y1-Y3=H, 1-10C alkyl, 5-10C aryl, hetero atom, heteroaryl, heteroalkyl, heteroarylene or heteroalkylene (in which hetero atom is chosen from N, O, S, Se and Si).    Preferred Definitions:    R1=group chosen from groups of formulae (1)-(15);    R5,R6=group chosen from groups of formulae (16)-(25), preferably group of formula (26);    X1=X;    R7,R8=H, D, halo, CN, CF3, nitro, 1-20C linear or brnached alkyl, 1-10C haloalkyl, 1-10C hydroxyalkyl, 1-10C alkyl, amino, 1-10C alkylamino, 1-10 dialkylamino, 5-10C arylamino, 5-10C diarylamino, mono(1-10C alkyl)silyl, di(1-10C alkyl)silyl, tri(1-10C alkyl)silyl, 5-10C aryl, 5-10C heteroaryl, 3-10C cycloalkyl, or 3-10C heterocycloalkyl;    Ra1,Rb1=H or phenyl;    P'=CH2;    l,k=1-4;and    R9=1-40C alkyl, 2-40C alkenyl, 5-40C aryl, 6-40C arylalkyl, 5-40C heteroaryl, 3-40C cycloalkyl or 3-40C heterocycloalkyl (all optionally substituted).    SPECIFIC COMPOUNDS - 185 Pyrenylamine derivatives are specifically claimed e.g. N,N,3,10,10-pentaphenyl-3-azahexacyclo(14.6.2.02,11.04,9.013,23.020,24)tetracosa-1,4(9),5,7,11,13,15,17,19,21,23-undecaen-17-amine of formula (Ia), N,N-bis(2,3,4,5,6-pentadeuterophenyl)-3,10,10-triphenyl-3-azahexacyclo(14.6.2.02,11.04,9.013,23.020,24)tetracosa-1,4(9),5,7,11,13,15,17,19,21,23-undecaen-17-amine, N,N-bis(4-methylphenyl)-3,10,10-triphenyl-3-azahexacyclo(14.6.2.02,11.04,9.013,23.020,24)tetracosa-1,4(9),5,7,11,13,15,17,19,21,23-undecaen-17-amine, N,N-bis(4-tert-butylphenyl)-3,10,10-triphenyl-3-azahexacyclo(14.6.2.02,11.04,9.013,23.020,24)tetracosa-1,4(9),5,7,11,13,15,17,19,21,23-undecaen-17-amine, and 3,10,10-triphenyl-N,N-bis(4-(trimethylsilyl)phenyl)-3-azahexacyclo(14.6.2.02,11.04,9.013,23.020,24)tetracosa-1,4(9),5,7,11,13,15,17,19,21,23-undecaen-17-amine.