In‐situ‐Bildung von (BN)₂‐Pyrenen und elektrolumineszierenden Elementen im Festkörper

Abstract

Neuartige BN-heterocyclische Verbindungen reagieren in einer doppelten Aren-Photoeliminierung unter Bildung gelb fluoreszierender BN-Pyrene mit zwei B-N-Einheiten. Bemerkenswert hierbei ist, dass die doppelte Aren-Eliminierung auch durche lektrisch erzeugte Exzitonen in elektrolumineszierenden (EL) Bauelementen gesteuert werden kann. Dies ermçglicht die In-situ-Umwandlung von BN-Heterocyclen in BN-Pyrene im Festkçrper und damit die Verwendung von BN-Pyrenen als Emitter in EL-Bauelementen. Dieses Phänomen der exzitongesteuerten Eliminierung (EDE) in situ wurde auch für weitere BN-Heterocylen beobachtet.

Generation of an N→B Ladder‐type Structure by Regioselective Hydroboration of an Alkenyl‐Functionalized Quaterpyridine

“…[3] Potential n-type materials have also been generated through intermolecular coordination of strong Lewis acids, such as tris(pentafluorophenyl)borane (B(C 6 F 5 ) 3 ), to conjugated polymers [4] and oligomers. [5] Examples of oligomerics ystems that feature intramolecular N!B-coordination, therefore, give rise to more well-definedl adder-type structures, have been investigated by groupso fY amaguchi( Scheme 1 A, [5] B [6] ), [7] Erker (A [5] ), [8] Wang (C [9] ), [10][11][12] and others. [13][14][15] Compound C in partic-ular has also been shown to be av ersatile precursor for fully conjugated boron containing heteroacenes.…”

Organoboron Polymer for 10% Efficiency All-Polymer Solar Cells

“…Optoelectronic polymers are always π-conjugated polymers consisting of C, H, N, S, and O elements. They have been successfully used in organic optoelectronic devices, e.g., organic light-emitting diodes (OLEDs), organic solar cells (OSCs), and organic field-effect transistors (OFETs), with the advantage of solution processing with low cost. − Main group element (e.g., B, P, Si) chemistry provides a new tool to tune the optoelectronic properties of organic small molecules and polymers and is thus expected to substantially expand the scope of optoelectronic materials. − While organic small molecules embedded with main group element atoms have demonstrated excellent device performance in multilayer vacuum-deposited optoelectronic devices, polymers containing these main group element atoms generally show moderate device performance in the single-layer solution-processed optoelectronic devices. − This is due to the multiple requirements for optoelectronic polymer materials, including the lowest unoccupied molecular orbital (LUMO) and the highest occupied molecular orbital (HOO) energy levels, charge carrier mobilities, absorption/emission spectra, stacking behaviors in a thin film, etc. Although polymers containing main group element atoms can possess one or two outstanding properties, it is difficult to design one specific polymer to combine all of these properties to give excellent optoelectronic device performance. , …”

A Soluble Dynamic Complex Strategy for the Solution‐Processed Fabrication of Organic Thin‐Film Transistors of a Boron‐Containing Polycyclic Aromatic Hydrocarbon

“…[4] Another promising strategy is the use of soluble precursors for organic semiconductors that contain thermally or photochemically removable solubilizing groups. [10,11] Thec onversion of these materials into the corresponding pristine semiconductors posterior to the formation of the thin films can be accomplished via several covalent bond-cleavage reactions,for example,retro-Diels-Alder reactions, [6,8,10d] the thermolysis of ester,amide,orcarbamate groups, [9, 10a-c] or the photo-elimination of a-diketones [7] (Figure 1). [10,11] Thec onversion of these materials into the corresponding pristine semiconductors posterior to the formation of the thin films can be accomplished via several covalent bond-cleavage reactions,for example,retro-Diels-Alder reactions, [6,8,10d] the thermolysis of ester,amide,orcarbamate groups, [9, 10a-c] or the photo-elimination of a-diketones [7] (Figure 1).…”