Synthesis, characterization and fluorescence studies of a novel europium complex based sensor

RETRACTED: A highly selective OFF-ON fluorescent sensor for D-3-HB in aqueous solution and living cells

“…All of these are based on the enzymatic dehydrogenation to acetoacetate by D-3-HB dehydrogenase ( HBDH ), followed by the detection of the reduced form of nicotineamide adenine dinucleotide ( NADH ) [17][18]. However, these conventional methods to test D-3-HB are tedious and time consuming, and suffered from loss of enzyme activity [19]. In view of these, to develop a simple and convenient way to detect D-3-HB independent of enzyme is urgent and necessary.…”

Eu3+- and Tb3+-Dipicolinate Complexes Covalently Grafted into Kaolinite as Luminescence-Functionalized Clay Hybrid Materials

“…Lanthanide-pyridinecarboxylate complexes grafted into the interlayer space of clays exhibit enhanced photophysical properties due to the interaction between the host (the clay matrix) and the guest (the lanthanide complexes) units. Compared with isolated carboxylic acids, carboxylates coordinated in lanthanide complexes have more intense absorptions (antenna effect); however, these complexes have low thermal stability, which restricts their technological application. , It has been shown that immobilization of luminescent organic complexes on inorganic matrixes like silica, alumina, zeolites, and clays avoids this drawback. , …”

“…Compared with isolated carboxylic acids, carboxylates coordinated in lanthanide complexes have more intense absorptions (antenna effect); however, these complexes have low thermal stability, which restricts their technological application. 3,6 It has been shown that immobilization of luminescent organic complexes on inorganic matrixes like silica, alumina, zeolites, and clays avoids this drawback. 31,32 Interest has recently increased on organic ligands derived from pyridine (pyridinecarboxylic acids), such as picolinic and dipicolinic acids, 33,34 which rather easily form complexes with many transition metals.…”

“…Lanthanide-pyridinecarboxylic (picolinic) acid complexes are important to develop advanced luminescent materials with applications in photoelectronics, laser, luminescence labels, fluorescent probes, luminescence sensors, light-conversion molecular devices (LCMDs), organic light-emitting devices (OLEDs), fluorescent lamps, and cathode-ray tubes as well as plasma display panels (PDPs). − Lanthanide-aromatic carboxylate complexes display interesting photophysical properties due to the antenna effect; that is, the organic ligand in the complex absorbs energy more intensely than the isolated organic ligand . However, these complexes exhibit low thermal and chemical stabilities.…”

Influence of Different Carboxylic Acid Ligands on Luminescent Properties of Eu(Lc)3phen (Lc = MAA, AA, BA, SA) Complexes

“…Recently, there has been a great interest in the study of rare earth and carboxylic acid complexes due to their low cost, good thermal stability, long luminescence time, color purity, and intense luminescence [5][6][7][8][9]. Moreover, it was found that luminescent properties could be improved by changing the molecular structure and the electrically neutral ligand [10][11][12][13][14]. is is because the electrically neutral ligand can substitute H 2 O to enhance the luminescence intensity [15,16].…”