ASYMMETRIC DENDRIMERS

• US 20090326238A1
• Filed: 05/26/2009
• Published: 12/31/2009
• Est. Priority Date: 02/20/2001
• Status: Active Grant

• Current Assignee: Cambridge Display Technology Limited (Sumitomo Chemical Company Limited)
• Original Assignee: Isis Innovation Limited, University of St Andrews
• Inventors: Lo, Shih-Chun, Burn, Paul Leslie, Samuel, Ifor David
• Granted Patent: US 7,960,557 B2
• Time in Patent Office: Days
• US Class Current: 548/145
• CPC Class Codes: C08G 83/003 Dendrimers
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/1003 Carbocyclic compounds
• CPC Class Codes: C09K 2211/1007 Non-condensed systems
• CPC Class Codes: C09K 2211/1014 bridged by heteroatoms, e.g. N, P, Si or B
• CPC Class Codes: C09K 2211/1029 containing one nitrogen atom as the heteroatom
• CPC Class Codes: C09K 2211/1048 with oxygen
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 85/1135 Polyethylene dioxythiophene [PEDOT]; Derivatives thereof
• CPC Class Codes: H10K 85/791 Starburst compounds
• CPC Class Codes: Y02E 10/549 Organic PV cells
• CPC Class Codes: Y10S 428/917 Electroluminescent

Abstract

Asymmetric light-emitting dendrimers having the formulae: (a) CORE-[DENDRITE1]n[DENDRITE2]m and (b) CORE-[DENDRITE]n are disclosed.

Claims

1. A light emitting dendrimer having the formula:

CORE-[DENDRITE¹]_n[DENDRITE²]_m

in which CORE represents an atom or group, n and m, which may be the same or different, each represent an integer of at least 1, each DENDRITE¹, which may be the same or different when n is greater than 1, and each DENDRITE², which may be the same or different when m is greater than 1, represent dendritic structures, at least one of said structures being fully conjugated and comprising aryl and/or heteroaryl groups and, optionally, vinyl and/or acetylenyl groups, connected via sp² or sp hybridized carbon atoms of said aryl, heteroaryl, vinyl and acetylenyl groups, and at least one branching point and/or link between the branching points in DENDRITE¹ being different from those in DENDRITE², CORE terminating in the single bond which is connected to a sp² hybridized (ring) carbon atom of the first (hetero)aryl group to which more than one conjugated dendritic branch is attached, said ring carbon atom forming part of said fully conjugated DENDRITE¹ or DENDRITE² and CORE terminating at the single bond to the first branching point for the other of said DENDRITE¹ or DENDRITE², at least one of the CORE, DENDRITE¹ and DENDRITE² being luminescent.

2-31. -31. (canceled)