Syntheses, crystal structures of blue luminescent complexes based on 2,6-bis(benzimidazolyl) pyridine

Two blue luminescent complexes, Cd(bbp)Cl2 (1) and In(bbp)Cl2(H2O) (2) (bbpZ2, 6-bis(benzimidazolyl)pyridine) were synthesized and characterized by X-ray single crystal structure analyses. For complex 1: space group P21/n, aZ14.491(3), bZ8.0147(19), cZ22.043(4) A° , aZ90, bZ117.71(11), gZ908, VZ2266.3(9) A ° 3, ZZ4; for complex 2: space group PK1, aZ7.075(3), bZ12.468(3), cZ14.418(3) A ° , aZ113.36(3), bZ93.31(3), gZ90.45(3)8, VZ1165.0(7) A ° 3, ZZ2. Both complexes emit blue luminescence in solid state and DMF solution. Two emission peaks at 495 and 524 nm are observed for complex 2 in DMF solution, the later can be assigned as metal-to-ligand charge transfer (MLCT) emission. q 2004 Elsevier B.V. All rights reserved.