1. A light up-conversion luminescent substance comprising a compound represented by the following general formula (1):
wherein group A represents a bivalent moiety of a polycyclic aromatic compound with 3 to 5 condensed rings optionally having a substituent;
Group B1 and group B2 each independently represent a trivalent group represented by the following general formula (2a) or (2b):
wherein in each of general formulas (2a) and (2b), group Z binds to group A, the remaining two binding hands bind to group X1 and group X2, and group Z represents a single bond, or a saturated or unsaturated, straight-chain or branched-chain alkylene group; Rn2 is 0 to 3 substituents which substitute for a hydrogen atom on a benzene ring and each independently represent an alkyl group, an alkoxy group, a phenyl group, a hydroxyl group, or an amino group; and
Group X1 and group X2 each independently represent a straight-chain or branched-chain alkylene group with a carbon number of two or more, optionally having at least one bond selected from the group consisting of an ether bond, an ester bond, an amide bond, and a sulfide bond.
2. The light up-conversion luminescent substance according to claim 1, wherein group A of general formula (1) is any one of the polycyclic aromatic compound moieties represented by the following general formulas (A1) to (A23):
In wherein each of general formulas (A1) to (A23), bivalent binding hands each exist at any position substitutable with a hydrogen atom on an aromatic ring; Rn1 is 0 or more substituents wherein each substitute for a hydrogen atom bound to an aromatic ring and each independently represent an alkyl group, an alkoxy group, a phenyl group, a hydroxyl group, or an amino group.
3. The light up-conversion luminescent substance according to claim 1, wherein group A of general formula (1) is any one of polycyclic aromatic compound moieties represented by the following general formulas (A1-1), (A1-2), (A2-1), (A3-1), (A4-1), (A5-1), (A5-2), (A6-1), (A9-1), (A9-2), (A9-3), (A9-4), (A14-1), (A14-2), (A14-3), and (A14-4)
wherein Rn1 is 0 or more substituents wherein each substitute for a hydrogen atom bound to an aromatic ring and each independently represent an alkyl group, an alkoxy group, a phenyl group, a hydroxyl group, or an amino group.
4. The light up-conversion luminescent substance according to claim 1, wherein group B1 and group B2 each independently represent any one of the trivalent groups represented by the following general formulas (3a-1) to (3a-4):
wherein in each of general formulas (3a-1) to (3a-4), Rn2 comprises 0 or more substituents wherein each substitute for a hydrogen atom bound to an aromatic ring and each independently represent an alkyl group, an alkoxy group, a phenyl group, a hydroxyl group, or an amino group.
5. The light up-conversion luminescent substance according to claim 1, wherein group X1 and group X2 of the general formula (1) each independently represent a straight-chain alkylene group with a carbon number of 5 to 10, optionally having at least one bond selected from the group consisting of an ether bond, an ester bond, an amide bond, and a sulfide bond.
6. A light up-conversion material comprising the light up-conversion luminescent substance according to claim 1, and a photosensitizer.
7. The light up-conversion material according to claim 6, further comprising a solvent, a resin, or a glass.
8. A method of converting a light wavelength, comprising irradiating the light up-conversion material according to claim 6 with light to cause emission of light having a shorter wavelength than the radiating light.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A computer-implemented method comprising:
receiving an initial search request from a first user;
presenting an initial search result to the first user, the initial search result based upon the initial search request;
receiving a modified search request from the first user;
presenting a modified search result to the first user, the modified search result based upon the modified search request and correlating the initial search request with the modified search request comprises assigning a score to the association wherein the score is assigned based on one or more of the time between the initial search request and the modified search request, the number of intervening queries between the initial search request and the modified search request, the number of intervening picks between the initial search request and the modified search request, the age or order of the association, whether or not the initial search request or modified search request generated picks and the pair-wise order of the initial search request and the modified search request;
receiving the initial search request from a second user; and
presenting the modified search result to the second user in response to the initial search request wherein presenting the modified search result to the second user comprises presenting a link corresponding to the initial search request.
2. The computer-implemented method of claim 1, further comprising:
maintaining a log of search engine activity information of the first user, the log including the initial search request and the modified search request;
correlating the initial search request with the modified search request, wherein correlating comprises associating the initial search request with the modified search request.
3. The computer-implemented method of claim 2, wherein maintaining the log comprises maintaining a log consisting of query-to-query activity information.
4. A machine-readable storage medium that provides executable instructions which, when executed by a processor, cause the processor to perform a method comprising: receiving an initial search request from a first user;
presenting an initial search result to the first user, the initial search result based upon the initial search request;
receiving a modified search request from the first user;
maintaining a log of search engine activity information of the first user, the log including the initial search request and the modified search request;
correlating the initial search request with the modified search request, wherein correlating comprises associating the initial search request with the modified search request;
presenting a modified search result to the first user, the modified search result based upon the modified search request wherein correlating the initial search request with the modified search request comprises assigning a score to the association, wherein the score is assigned based on one or more of the time between the initial search request and the modified search request, the number of intervening queries between the initial search request and the modified search request, the number of intervening picks between the initial search request and the modified search request, the age or order of the association, whether or not the initial search request or modified search request generated picks and the pair-wise order of the initial search request and the modified search request;
receiving the initial search request from a second user; and
presenting the modified search result to the second user in response to the initial search request wherein presenting the modified search result to the second user comprises presenting a link corresponding to the initial search request.
5. The machine-readable storage medium of claim 4, wherein maintaining the log comprises maintaining a log consisting of query-to-query activity information.