Photoluminescent compounds and uses thereof

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

• wherein
• T1 each is independently H, Q1, OQ1, CF3,C(O)Q1, NQ1Q2, NO2, CN, SQ1, —NQ1Q2CONQ3Q4, NCO, NCS, —OC(O)OQ1 or halide;
• T2 each is independently H, Q1, OQ1, CF3, C(O)Q1 , NQ1Q2, NO2, CN, SQ1 , —NQ1Q2CONQ3Q4, NCO, NCS, —OC(O)OQ1 or halide;
• T3 each is independently H, Q1,OQ1,CF3, C(O)Q1,NQ1Q2, NO2,CN, SQ1, —NQ1Q2CONQ3Q4, NCO, NCS, —OC(O)OQ1 or halide;
• T4 and T4′ are each independently selected from alkyl, haloalkyl, heterocycloalkyl, cycloalkyl and benzyl;
• T5 and T5′ are each independently selected from H, —(CH2)pOC(O)NH(CH2)qSi(Oalkyl)3,
• —(CH2)pOC(O)CH═CH2, —(CH2)pSi(Oalkyl)3, —OC(O)N(H)Q4, —OC(S)N(H)Q4, —N(H)C(O)N(Q3)2, —N(H)C(S)N(Q3)2, NQ1Q2CONQ3Q4, NCO, NCS, alkenyl, alkynyl, epoxide, alkylated epoxide, azide and halide;
• T6, T6′, T7′ and T7′ are each independently selected from H, Q1, OQ1, CF3, C(O)Q1, COOQ1, CON(Q1)2, NQ1Q2, NO2, CN, SO3−, SO3M, SO3H, SQ1, —NQ1Q2CONQ3Q4, NCO, NCS, alkenyl, alkynyl, epoxide, alkylated epoxide, azide and halide;
• or
• T4 and T5 or T4′ and T5′ form together a N-heterocyclic ring wherein said ring is optionally substituted;
• Q1 and Q2 are each independently selected from H, alkyl, haloalkyl, heterocycloalkyl, cycloalkyl, aryl, benzyl, —(CH2)pOC(O)NH(CH2)qSi(Oalkyl)3, —(CH2)pOC(O)CH═CH2,
• —(CH2)pSi(Oalkyl)3, —OC(O)N(H)Q4, —OC(S)N(H)Q4, —N(H)C(O)N(Q3)2 and —N(H)C(S)N(Q3)2;
• Q3 and Q4 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 T5-T7 and T5′-T7′ is SO3−, then X is omitted;
• wherein if at least one of T4 and T4′ is haloalkyl—then at least one of T5 and T5 ′ is H or halide;
• and
• wherein if at least one of T4 and T4′ is alkyl—then all T1-T3 are each independently selected from H, Q1, OQ1, CF3, C(O)Q1, NQ1Q2, NO2,CN, SQ1, —NQ1Q2CONQ3Q4, NCO, NCS or —OC(O)OQ1.