An efficient synthesis of novel spiro[[8H]indeno[2,1-b]-thiophene-8,9′-fluorene] building block for blue light-emitting materials

We have developed efficient synthetic routes to obtain a novel building block spiro[[8H]indeno[2,1-b]thiophene-8,9′-fluorene] (SITF) and constructed a blue light-emitting material 2′,7′-bis-(9,9′-spirobifluoren-2-yl)spiro[[8H]indeno[2,1-b]thiophene-8,9′-fluorene] (BSBF-SITF). Light-emitting materials based on SITF with unique regioselective feature will be promising for constructing complicated optoelectrical systems.