Mimicking Of A Single Molecular Logic Gate And Investigation Of Organic Light Emitting Material For Simplified OLED Architecture

1. A series of donor-acceptor compounds were synthesized by covalently bonded carbazole or tercarbazole to phthalimide or 2,3-dithienylmaleimide through varied bridge. The synthesized structures were fully characterized by 1H NMR, 13C NMR and El / ESI as well. Their emission spectra were studied by photostationary fluorescence measurements and time-resolved fluorescence measurements. As a result, dual fluorescence was observed in non-polar solvents. Long-wavelength emission was found to consist of two components: +D||A" exciplexes resulted by "harpooning effect" and +D^^A" exciplexes stablized by solvation. Moreover, ring closing reaction of 2,3-dithienylmaleimide was speeded up by efficiency intramolecular energy transfer. Coexistence of intramolecular charge-transfer and energy-transfer was thereby observed in these D-A molecules. By mimicing the function of an integrated logic gate, the 2-input AND logic operation was established.2. Carbazole-pyrene based compounds were synthesized and fully characterized. Their photoluminescence properties were studied. Fluorescence quantum yield was improved dramatically by inserting pyrene as electron-acceptor. Blending 9-(3-(2-(l-(2-(3-(9H-carbazol-9-yl)-9-p-tolyl-9H-carbazol-6-yl)ethynyl)pyren-6-yl)ethynyl)-9-p-tolyl-9H-carbazol-6-yl)-9H-carbazole with poly (N-vinylcarbazole) (PVK), simplified electroluminescent (EL) device with green emission was fabricated. Maximum luminance reached 1000 cd/m2.