title: Aqueous Eu(II)-Containing Complex with Bright Yellow Luminescence.
abstract: Eu(II)-containing materials have unique luminescence, redox, and magnetic properties that have potential applications in optoelectronics, sensors, and imaging. Here, we report the synthesis and characterization of Eu(II)-containing aza-222 cryptate that displays yellow luminescence and a quantum yield of 26% in aqueous media. The crystal structure reveals a staggered hula-hoop geometry. Both solid-state and solution-phase data are presented that indicate that the high quantum yield is a result of the absence of OH oscillators in the inner sphere of the complex. We expect that Eu(II)-containing aza-222 cryptate is a step toward Eu(II)-containing luminescent materials that can be used in a variety of applications including biological imaging.
authors: †Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States.
authors: Akhila N W
authors: AN
authors: Kuda-Wedagedara
authors: †Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States.
authors: Chengcheng
authors: C
authors: Wang
authors: ‡Lumigen Instrument Center, Chemistry Department, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States.
authors: Philip D
authors: PD
authors: Martin
authors: †Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States.
authors: Matthew J
authors: MJ
authors: Allen
mesh_terms: D056831:Coordination Complexes / Q000737:chemistry*; D005063:Europium / Q000737:chemistry*; D049449:Luminescence; D008163:Luminescent Measurements; D015394:Molecular Structure; D012996:Solutions; D014867:Water / Q000737:chemistry
chemical_list: D056831:Coordination Complexes; D012996:Solutions; D014867:Water; D005063:Europium