Photoluminescent compounds and uses thereof

1. A photoluminescent compound represented by the structure of formula (VII):

wherein

T 1 each is independently H, Q 1 , OQ 1 , CF 3 ,C(O)Q 1 , NQ 1 Q 2 , NO 2 , CN, SQ 1 , —NQ 1 Q 2 CONQ 3 Q 4 , NCO, NCS, —OC(O)OQ 1 or halide;

T 2 each is independently H, Q 1 , OQ 1 , CF 3 , C(O)Q 1 , NQ 1 Q 2 , NO 2 , CN, SQ 1 , —NQ 1 Q 2 CONQ 3 Q 4 , NCO, NCS, —OC(O)OQ 1 or halide;

T 3 each is independently H, Q 1 ,OQ 1 ,CF 3 , C(O)Q 1 ,NQ 1 Q 2 , NO 2 ,CN, SQ 1 , —NQ 1 Q 2 CONQ 3 Q 4 , NCO, NCS, —OC(O)OQ 1 or halide;

T 4 and T 4′ are each independently selected from alkyl, haloalkyl, heterocycloalkyl, cycloalkyl and benzyl;

T 5 and T 5′ are each independently selected from H, —(CH 2 ) p OC(O)NH(CH 2 ) q Si(Oalkyl) 3 ,

—(CH 2 ) p OC(O)CH═CH 2 , —(CH 2 ) p Si(Oalkyl) 3 , —OC(O)N(H)Q 4 , —OC(S)N(H)Q 4 , —N(H)C(O)N(Q 3 ) 2 , —N(H)C(S)N(Q 3 ) 2 , NQ 1 Q 2 CONQ 3 Q 4 , NCO, NCS, alkenyl, alkynyl, epoxide, alkylated epoxide, azide and halide;

T 6 , T 6′ , T 7′ and T 7′ are each independently selected from H, Q 1 , OQ 1 , CF 3 , C(O)Q 1 , COOQ 1 , CON(Q 1 ) 2 , NQ 1 Q 2 , NO 2 , CN, SO 3 − , SO 3 M, SO 3 H, SQ 1 , —NQ 1 Q 2 CONQ 3 Q 4 , NCO, NCS, alkenyl, alkynyl, epoxide, alkylated epoxide, azide and halide; or

T 4 and T 5 or T 4′ and T 5′ form together a N-heterocyclic ring wherein said ring is optionally substituted;

Q 1 and Q 2 are each independently selected from H, alkyl, haloalkyl, heterocycloalkyl, cycloalkyl, aryl, benzyl, —(CH 2 ) p OC(O)NH(CH 2 ) q Si(Oalkyl) 3 , —(CH 2 ) p OC(O)CH═CH 2 ,

—(CH 2 ) p Si(Oalkyl) 3 , —OC(O)N(H)Q 4 , —OC(S)N(H)Q 4 , —N(H)C(O)N(Q 3 ) 2 and —N(H)C(S)N(Q 3 ) 2 ;

Q 3 and Q 4 are each independently selected from H, alkyl, haloalkyl, heterocycloalkyl, cycloalkyl, aryl and benzyl;

M is a monovalent cation;

n, m and l are independently an integer between 1-5;

p and q are independently an integer between 1-6;

X − is an anion;

wherein if one of T 5 -T 7 and T 5′ -T 7′ is SO 3 − , then X is omitted;

wherein if at least one of T 4 and T 4′ is haloalkyl—then at least one of T 5 and T 5 ′ is H or halide; and

wherein if at least one of T 4 and T 4′ is alkyl—then all T 1 -T 3 are each independently selected from H, Q 1 , OQ 1 , CF 3 , C(O)Q 1 , NQ 1 Q 2 , NO 2 ,CN, SQ 1 , —NQ 1 Q 2 CONQ 3 Q 4 , NCO, NCS or —OC(O)OQ 1 .

2. The photoluminescent compound of claim 1 , wherein said compound is represented by the structure of formula (VIII):

3. The photoluminescent compound of claim 2 , wherein said compound is represented by the structure of formula (IX):

4. The photoluminescent compound of claim 3 , wherein said compound is represented by the structure of formula (X):

5. The photoluminescent compound of claim 1 , wherein said anion is a sulfate, chloride, bromide, iodide, perchlorate, nitrate, trifluoroacetate, hydroxide, hydrosulfide, sulfide, nitrite, carboxylate, dicarboxylate, sulfonate, tetrafluoroborate, hexafluorophosphate, hypophosphite, phosphate, phosphite, cyanate, cyanide, isocyanate, thiocyanate, tetra-alkylborate, tetra-arylborate or chromate.

6. A photoluminescent device comprising a color-conversion layer comprising a photoluminescent compound according to claim 1 .

7. The photoluminescent device of claim 6 , wherein said color-conversion-layer is in a form of a film.

8. The photoluminescent device of claim 7 , wherein said photoluminescent compound comprises an emission peak between 520-560 nm and FWHM between 30 and 55 nm.