TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Compounds: The fluorene-type compound (I) is preferably of formula (II). The CPE or COE is fluorene-type compound (I), silicon complexes of formulae (III) and (IV), silicon complex of formula (V), aromatic derivatives of formulae (VI) and (VII), or benzothiadiazole of formula (VIII). The CPE or COE does not include fluorene-type compound of formula (IX).A=group of formula (a);B'=group of formula (b);R=-(CH2)6N+(CH3)3Br-;A=R"-Ar'-linker-Ar"-, R"-Ar'-linker-Ar"-CH=CH-, R"-Ar'-linker-Ar"-CC- or their salt;Ar'=group of formula (i)-(iv);Ar"=fluorene, benzene, biphenyl, thiophene, benzothiadiazole, 4,7-di(thien-5'-yl)-2,1,3-benzothiadiazole, pyridine, bipyridinium, triphenylamine, anthracene or carbazole;R",T"=terminating group;andlinker=single bond, double bond, triple bond, -CH2- or -CH2CH2-.Preferred Process: The surface of the solid support is functionalized with a charged ligand, to create a charge on the surface of solid support. The ligand-functionalized solid support is incubated with a sample, such that target and charge on surface of the solid support couples. The sample is incubated with (CPE) or (COE), such that charge of CPE or COE is complementary to the charge on the surface of the target-bound surface, and fluorescence of the solid support is detected. Preferred Definitions:    Y'=sodium or potassium.    EXAMPLE - 2,7-Dibromo-9,9-bis(2-(2-(2-methoxyethoxy)-ethoxy)ethyl)fluorene (2 mmol), tributylvinyl tin (4.2 mmol), bis(triphenylphosphine)palladium(II)dichloride (56 mg), 2,6-di-t-butylphenol (38 mmol) and toluene (20 ml) were mixed, stirred, heated at 100 degrees C for 24 hours under nitrogen atmosphere cooled to room temperature, treated with aqueous solution of hydrogen fluoride, and stirred for 12 hours. The obtained mixed solution was filtered, and filtrate was dried. Solvent was removed under reduced pressure, and subjected to silica gel column chromatography to obtain 9,9-bis(2-(2-(2-methoxyethoxy)-ethoxy)ethyl)-2,7-divinyl fluorene (0.7 g) having yield of 68%.