Reagents for directed biomarker signal amplification
Described herein are methods, compositions and articles of manufacture involving neutral conjugated polymers including methods for synthesis of neutral conjugated water-soluble polymers with linkers along the polymer main chain structure and terminal end capping units. Such polymers may serve in the fabrication of novel optoelectronic devices and in the development of highly efficient biosensors. The invention further relates to the application of these polymers in assay methods.
1. A conjugated polymer comprising π-conjugated repeat units, wherein the conjugated polymer is non-ionic and the π-conjugated repeat units comprise:
an Ar polycyclic repeat unit that is evenly or randomly distributed along the polymer main chain;
an MU polymer modifying unit or band gap modifying unit that is evenly or randomly distributed along the polymer main chain; and
a linker L1 that is an aryl or a heteroaryl group evenly or randomly distributed along the polymer main chain; and
G1 and G2 are terminating groups, at least one of which is selected from: alkyne, optionally substituted aryl, optionally substituted heteroaryl, halogen substituted aryl, optionally substituted fluorene and aryl or heteroaryl, and wherein G1 and G2 do not comprise a repeat unit.
2. The conjugated polymer according to claim 1 , wherein Ar comprises fluorene.
3. The conjugated polymer according to claim 2 , wherein L1 comprises an aryl or a heteroaryl group substituted with one or more pendant chains terminated with:
i) a functional group selected from amine, carbamate, carboxylic acid, carboxylate, maleimide, activated ester, N-hydroxysuccinimidyl, hydrazine, hydrazide, hydrazone, azide, alkyne, aldehyde, thiol, and protected groups thereof for conjugation to a molecule, substrate, or biomolecule; or
ii) a conjugated organic dye, substrate, or biomolecule.
4. The conjugated polymer according to claim 3 , wherein the functional group of (i) is for conjugation to a polymer substrate, or wherein the substrate of (ii) is a polymer substrate.
5. The conjugated polymer according to claim 4 , wherein the polymer substrate comprises polystyrene.
6. The conjugated polymer according to 43, wherein L1 comprises an aryl or a heteroaryl group substituted with one or more pendant chains:
i) terminated with an amine functional group, or protected groups thereof, for conjugation to a quantum dot; or
ii) conjugated to a quantum dot.
7. The conjugated polymer according to claim 3 , wherein the conjugated polymer further comprises L2 that is an aryl or a heteroaryl group evenly or randomly distributed along the polymer main chain.
8. The conjugated polymer according to claim 7 , wherein the conjugated polymer further comprises one or more additional 7-conjugated repeat units.
9. The conjugated polymer according to claim 2 , wherein the polymer is comprises a sensor protein.
10. The conjugated polymer according to claim 9 , wherein the sensor protein comprises an antibody or streptavidin.
11. The conjugated polymer according to claim 10 , wherein the sensor protein comprises an antibody.
12. The conjugated polymer according to claim 2 , wherein Ar, MU and L1 are randomly distributed along the polymer main chain.
13. The conjugated polymer according to claim 2 , wherein MU is a polymer modifying unit.
14. The conjugated polymer according to claim 13 , wherein the polymer modifying unit is aryl or substituted aryl.
15. The conjugated polymer according to claim 2 , wherein MU is a band gap modifying unit.
16. The conjugated polymer according to claim 15 , wherein the band gap modifying unit is aryl or substituted aryl.
17. The conjugated polymer according to claim 2 , wherein the conjugated polymer is linked to an organic dye.
18. The conjugated polymer according to claim 17 , wherein the organic dye is a BODIPY dye.
19. The conjugated polymer according to claim 2 , wherein the conjugated polymer comprises a structure of the formula:
wherein
n is an integer selected so that the conjugated polymer has a molecular weight ranging from 5,000 g/mol to 100,000 g/mol; and
L2 is optional and is an aryl or a heteroaryl group evenly or randomly distributed along the polymer main chain; and
a, b, c and d define the mol % of each unit within the structure which each can be evenly or randomly repeated and where a is a mol % from 10 to 100%, b is present up to 90%, c is present up to mol % 25 and d is mol % from 0 to 25%.
20. The conjugated polymer according to claim 19 , wherein the conjugated biomolecule comprises a sensor protein.
21. The conjugated polymer according to claim 20 , wherein the sensor protein comprises an antibody or streptavidin.
22. The conjugated polymer according to claim 21 , wherein the sensor protein comprises an antibody.
23. The conjugated polymer according to claim 2 , wherein the fluorene is a substituted fluorene.
24. The conjugated polymer according to claim 1 , wherein Ar comprises fluorene substituted with an alkyl chain.
25. The conjugated polymer according to claim 19 , wherein Ar comprises fluorene substituted with an alkyl chain.
26. The conjugated polymer according to claim 3 , wherein Ar comprises fluorene substituted with an alkyl chain.
27. The conjugated polymer according to claim 6 , wherein Ar is a fluorene substituted with an alkyl chain.
28. The conjugated polymer according to claim 7 , wherein Ar is a fluorene substituted with an alkyl chain.
29. The conjugated polymer according to claim 12 , wherein Ar is a fluorene substituted with an alkyl chain.
30. The conjugated polymer according to claim 16 , wherein Ar is a fluorene substituted with an alkyl chain.
31. The conjugated polymer according to claim 2 , wherein at least one of G1 and G2 comprises a sensor protein.
32. The conjugated polymer according to claim 31 , wherein the sensor protein comprises an antibody.