# US 2017/0288146 A1 · Host material for delayed fluorescent materials, organic light-emitting device and compound > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0288146 A1 - Document ID: US20170288146A1 - Status: Published application - Kind: A1 - Application number: 15/508,236 - Filed: 2015-09-02 - Published: 2017-10-05 - Earliest claimed: 2014-09-03 - Assignees: Kyulux, Inc. - Applicants: Kyushu University, National University Corporation - Inventors: Hirokazu KUWABARA; Takumi SHIBATA; Takehiro TAKAHASHI; William POTSCAVAGE; Chihaya ADACHI - Web page: https://patentgrep.com/patent/US20170288146A1 ## CPC - H10K 85/626: {containing more than one polycyclic condensed aromatic rings, e.g. bis-anthracene} - C07C 15/38: containing four rings - C07C 49/788: with keto groups bound to a condensed ring system - C09K 11/025: {non-luminescent particle coatings or suspension media} - C09K 11/06: containing organic luminescent materials - H10K 85/622: {containing four rings, e.g. pyrene} - H10K 85/633: {comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom} - C09K 2211/1007: Non-condensed systems - C09K 2211/1011: Condensed systems - C09K 2211/1014: bridged by heteroatoms, e.g. N, P, Si or B - H10K 50/11: characterised by the electroluminescent [EL] layers - H10K 85/615: {Polycyclic condensed aromatic hydrocarbons, e.g. anthracene} - H10K 85/654: {comprising only nitrogen as heteroatom (H10K85/652 takes precedence)} - H10K 85/6572: {comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole} - H10K 2101/10: Triplet emission - H10K 2101/20: Delayed fluorescence emission - H10K 2101/90: {Multiple hosts in the emissive layer} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE ## Abstract A compound represented by (Tr)n-Z is useful as a host material for delayed fluorescent materials. Tr represents a substituted or unsubstituted triphenylenyl group, and plural Tr's existing in the general formula (1) may be the same as or different from each other. Z represents a carbonyl group or a substituted or unsubstituted, n-valent aromatic hydrocarbon group. n represents an integer of 2 to 6, but when Z is a carbonyl group, n is 2. ## Claims ### Claim 1 (canceled) ### Claim 2 (depends on 13) The organic light-emitting device according to claim 13, wherein Z is a substituted or unsubstituted, n-valent aromatic hydrocarbon group. ### Claim 3 (depends on 2) The organic light-emitting device according to claim 2, wherein Z is an n-valent benzene residue. ### Claim 4 (depends on 3) The organic light-emitting device according to claim 3, wherein Tr bonds to the 1-position and the 3-position of the benzene residue. ### Claim 5 (depends on 2) The organic light-emitting device according to claim 2, wherein Z is an n-valent biphenyl residue. ### Claim 6 (depends on 2) The organic light-emitting device according to claim 2, wherein Z is an n-valent aromatic hydrocarbon group substituted with a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group. ### Claim 7 (depends on 13) The organic light-emitting device according to claim 13, wherein Z is a carbonyl group. ### Claim 8 (depends on 7) The organic light-emitting device according to claim 7, wherein at least one Tr has a substituent represented by the following general formula (2): Tr4-CO— General Formula (2) wherein Tr4 represents a substituted or unsubstituted triphenylenyl group. ### Claim 9 (depends on 8) The organic light-emitting device according to claim 8, wherein two Tr's have, in total, 1 to 5 substituents each represented by the general formula (2). ### Claim 10 (depends on 7) The organic light-emitting device according to claim 7, which contains a partial structure with a carbonyl group bonding to the 2-position, the 3-position, the 6-position, the 7-position, the 10-position or the 11-position of the triphenylene ring inside the molecule. ### Claim 11 (depends on 10) The organic light-emitting device according to claim 10, wherein all the carbonyl groups bonding to the triphenylene ring existing inside the molecule bond to the 2-position, the 3-position, the 6-position, the 7-position, the 10-position or the 11-position of the triphenylene ring. ### Claim 12 (depends on 13) The organic light-emitting device according to claim 13, wherein at least one Tr in the general formula (1) is a triphenylenyl group substituted with a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group. ### Claim 13 An organic light-emitting device comprising a layer that contains a delayed fluorescent material and a host material represented by the following general formula (1): (Tr)n-Z General Formula (1) wherein Tr represents a substituted or unsubstituted triphenylenyl group, and plural Tr's existing in the general formula (1) may be the same as or different from each other; Z represents a carbonyl group or a substituted or unsubstituted, n-valent aromatic hydrocarbon group; n represents an integer of 2 to 6, but when Z is a carbonyl group, then n is 2. ### Claim 14 (canceled) ### Claim 15 (depends on 13) The organic light-emitting device according to claim 13, which is an organic electroluminescence device. ### Claim 16 A compound represented by the following general formula (3): Tr1-CO-Tr2 General Formula (3) wherein Tr1 and Tr2 each independently represent a substituted or unsubstituted triphenylenyl group, and Tr1 and Tr2 may be the same as or different from each other. ### Claim 17 A compound represented by the following general formula (4): (Tr3)n1-Z General Formula (4) wherein Tr3 represents a substituted or unsubstituted triphenylenyl group, and plural Tr3's existing in the general formula (4) may be the same as or different from each other; Z1 represents a substituted or unsubstituted n-valent aromatic hydrocarbon group; n1 represents an integer of 2 to 6; at least one of Tr3 and Z1 is substituted with a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group; when Tr3 is unsubstituted, then Z1 is a benzene ring residue substituted with a phenyl group or a methyl group and bonds to Tr3 at the 1-position and the 3-position, or is a biphenyl residue substituted with a phenyl group.