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Relevant academic research and scientific papers

Lanthanide loading of luminescent multi-tridentate polymers under thermodynamic control

This work illustrates the use of basic statistical mechanics for rationalizing the loading of linear multitridentate polymers with trivalent lanthanides, Ln(III), and identifies the specific ionic sizes of europium and yttrium as promising candidates for the further design of organized heterometallic f-f′ materials. Using [Ln(hfac)3] (hfac = hexafluoroacetylacetonate) as lanthanide carriers, the thermodynamically controlled formation of Wolf type-II lanthanidopolymers [{Ln(hfac) 3}m(L4)] is modeled with the help of two simple microscopic descriptors: (i) the intrinsic affinity of Ln(III) for the tridentate binding sites fN3Ln and (ii) the intermetallic interactions δE1-2Ln,Ln operating between two occupied adjacent sites. Selective complexation modulated by anticooperative interactions favors the fixation of Eu(III) in semiorganized lanthanidopolymers [{Eu(hfac)3} m(L4)] displaying exploitable light-downshifting.

Design and synthesis of polymeric chiral bicyclo[3.3.0] diene as reusable ligand for rhodium-catalyzed asymmetric 1,4-addition

A series of A-B type sterically regular bicyclio[3.3.0] diene-based polymers were designed and synthesized as immobilized chiral diene ligands for asymmetric catalysis. With polymeric diene 6b, good to excellent enantioselectivities can be achieved in Rh-catalyzed asymmetric 1,4-addition of arylboronic acids to α,β-unsaturated ketones. A series of A-B type sterically regular bicyclio[3.3.0] diene-based polymers were designed and synthesized as immobilized chiral diene ligands for asymmetric catalysis. By using polymeric diene, good to excellent enantioselectivities can be achieved in Rh-catalyzed asymmetric 1,4-addition of arylboronic acids to α,β-unsaturated ketones. Copyright

Preparation and photoluminescence of p-terphenyl derivatives containing cyano groups

Fifteen p-terphenyls containing alkoxylated backbones with and without cyano groups on the phenyl moieties have been designed and synthesized. The influences of the position and the number of cyano groups on the phenyl moieties as well as the skeleton to

Syntheses and emission properties of novel violet-blue emissive aromatic bis(diazaborole)s

Violet-blue emission from novel aromatic bis(diazaborole)s, which were synthesized by the reaction of 2,5-bis(hexyloxy)-1,4-phenylenediboronic acid and 1,2-phenylenediamine derivatives or diaminonaphthalene derivatives, is described. White-blue emission front a 4-methoxy-1,2-phenylenediamine-derived molecule was observed in DMF using 340 nm as the excitation wavelength.

Synthesis and characterization of a new conjugated polymer containing cyano substituents for light-emitting diodes

A new luminescent conjugated polymer (CN-P3PV) containing cyano groups as electron transporting units was synthesized by a Suzuki coupling reaction. CN-P3PV was characterized by 1H NMR, FT-IR, GPC, DSC, and TGA. The synthesized polymer possessed high thermal stability (Td = 360 °C, Tg= 151 °C), high electron affinity, and good thin-film forming ability. Electrical characterization of a double-layer organic LED based on the structure of ITO/CuPc/CN-P3PV/Ca/Ag showed high electron transporting ability and good electroluminescence performance with the emission of bright orange light.

Functionalized major-groove and minor-groove chiral polybinaphthyls: Application in the asymmetric reaction of aldehydes with diethylzinc

A series of functionalized and optically active major-groove polybinaphthyls and minor-groove polybinaphthyls have been synthesized by using the Suzuki coupling reaction and have been spectroscopically characterized. The application of these chiral polymers in the asymmetric addition of diethylzinc to aldehydes has been studied. A minor-groove polybinaphthyl is found to be an excellent catalyst for the asymmetric reaction of diethylzinc with a number of aldehydes. The molecular weight and the molecular weight distribution of the polymer have little effects on the catalytic process. The chiral polymer can be easily recovered and reused without loss of catalytic activity as well as enantioselectivity. These rigid and sterically regular chiral polybinaphthyls represent a new generation of enantioselective polymeric catalysts. The reaction of the polybinaphthyls as well as certain monomeric binaphthyl molecules with diethylzinc has been investigated which has provided further information on the novel polymeric catalysts.