TECHNOLOGY FOCUS - ELECTRONICS - Preferred Device: An organic light-emitting device consists of an anode (201), a cathode (207), and one or more organic medium layers including a light-emitting layer disposed between the anode and the cathode, where at least one layer of the organic medium layers comprises the platinum complex (I).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation: No general preparation is given. Preferred Definitions:    X1-X7=H;    R5,R10=1-4C perfluoroalkyl, preferably CF3, or R4 and R5 are group of formula (5), or R9 and R10 are group of formula (5);and    R14-R16=1-8C alkyl, preferably methyl.    When R11 is H, then R12 and R13 are group of formula (1), or when R13 is H, then R11 and R13 are group of formula (1).    SPECIFIC COMPOUNDS - 7 Platinum complexes such as platinum((isoquinolin-1-yl)-1,10,10-trimethyl-3,4-diazatricyclo(5.2.1.02,6)deca-2,5-diene)pyridine-2-carboxyate of formula (A), 7-(3,5-dimethylpyrazolidin-1-yl)-7-(pyrazolidin-1-yl)-5,6,8,l4-triaza-7-platinatricyclo(6.4.0.02,6)dodeca-1(8),2,4,9,11-pentaene, platinum(5-(isoquinolin-3-yl)-1,10,10-trimethyl-3,4-diazatricyclo(5.2.1.02,6)deca-2,5-diene)pyridine-2-carboxyate, 4,4"-dimethyl-1',l4,7',l4,8,l4,8",l4-dispiro(5,6,8,l4-triaza-7-platinatricyclo(6.4.0.02,6)dodecane-7,2'-(1,l5,3,7,l4,9)tetraaza-(2,8)diplatinatricyclo(7.3.0.03,7)dodecane-8',7"-(5,6,8,l4)triaza-(7)platinatricyclo(6.4.0.02,6)dodecane)-1(8),1'(12'),1"(8"),2,2",4,4',4",6',9,9",10',11,11"-tetradecaene and 4,4"-dimethyl-1',l4,7',l4,8,l4,8",l4-dispiro(5,6,8,l5-triaza-7-platinatricyclo(6.4.0.02,6)dodecane-7,2'-(1,l5,3,7,l4,9)tetraaza-(2,8)diplatinatricyclo(7.3.0.03,7)dodecane-8',7"-(5,6,8,l4)triaza-(7)platinatricyclo(6.4.0.02,6)dodecane)-1(12),1'(12'),1"(8"),2",4',4",6',8,9",10,10',11"-dodecaene are disclosed.    EXAMPLE - Picolinic acid (in mg), sodium carbonate (186) and platinum((isoquinolin-1-yl)-1,10,10-trimethyl-3,4-diazatricyclo(5.2.1.02,6)deca-2,5-diene)dichloride (100) were dissolved in 2-methoxyethanol (30 ml), and heated at 100 degrees C for 16 hours. An excess of water was added after the solution was cooled to room temperature. The precipitate was filtered and dried under vacuum, purified by silica gel column chromatography and recrystallized, to obtain platinum((isoquinolin-1-yl)-1,10,10-trimethyl-3,4-diazatricyclo(5.2.1.02,6)deca-2,5-diene)pyridine-2-carboxyate.