Synthesis and characterization of a dipyridocatecholate silicon complex
摘要:
The reaction of [Si(bpy)(2)I-2]I-2 with 1,10-phenanthroline-5,6-dione followed by metathesis provides various salts of [Si(bpy)(2)(dpcat)](+2) (1, bpy = 2,2'-bipyridine and dpcat = dipyridocatecholate). Recrystallization of [Si(bpy)(2)(dpcat)](ClO4)(2) from an aqueous solution of NaClO4 afforded orange crystals of Na[Si(bpy)(2)(dpcatH)](ClO4)(4)center dot 3H(2)O (2), in which silicon possesses a distorted octahedral geometry. The dipyridocatecholate ligand is coordinated to the silicon through the oxygen atoms, and one of the nitrogen atoms is protonated. Si-29 NMR and ESI-mass spectroscopy indicate [Si(bpy)(2)(dpcat)](+2) maintains its hexacoordinate structure in solution. The complex is stable with respect to hydrolysis, and degassed aqueous solutions luminesce at 410 nm. (c) 2013 Elsevier B.V. All rights reserved.
Synthesis and characterization of a dipyridocatecholate silicon complex
摘要:
The reaction of [Si(bpy)(2)I-2]I-2 with 1,10-phenanthroline-5,6-dione followed by metathesis provides various salts of [Si(bpy)(2)(dpcat)](+2) (1, bpy = 2,2'-bipyridine and dpcat = dipyridocatecholate). Recrystallization of [Si(bpy)(2)(dpcat)](ClO4)(2) from an aqueous solution of NaClO4 afforded orange crystals of Na[Si(bpy)(2)(dpcatH)](ClO4)(4)center dot 3H(2)O (2), in which silicon possesses a distorted octahedral geometry. The dipyridocatecholate ligand is coordinated to the silicon through the oxygen atoms, and one of the nitrogen atoms is protonated. Si-29 NMR and ESI-mass spectroscopy indicate [Si(bpy)(2)(dpcat)](+2) maintains its hexacoordinate structure in solution. The complex is stable with respect to hydrolysis, and degassed aqueous solutions luminesce at 410 nm. (c) 2013 Elsevier B.V. All rights reserved.