A series of mononuclear lanthanide Zn-Dy-Zn type single-molecule magnets (SMMs) were synthesized and magnetically characterized. The four molecules ([Zn2(L1)2DyCl3]·2H2O (1), [Zn2(L1)2Dy(MeOH)Br3]·3H2O (2), [Zn2(L1)2Dy(H2O)Br2]·[ZnBr4]0.5 (3) [Zn2(L2)2DyCl3]·2H2O (4)) all display remarkable magnetic relaxation behavior with a relatively high energy barrier hysteresis temperature, despite possessing low local geometry symmetry the center Dy(iii) ions. Ab initio studies revealed that charge...

Chiral lanthanide cages with circularly polarized luminescence (CPL) properties have found potential application in enantioselective guest recognition and sensing. However, it still remains a big challenge to develop simple robust method for the diastereoselective assembly of homochiral view large lability Ln(III) ions. Herein, we report first example formation enantiopure tetrahedral cage via chiral ancillary ligand induction strategy. One such cage, (Eu4L4)(R/S-BINAPO)4, is assembled by...

The perfect host? A simple phosphine–oxide host, bis{2-[di(phenyl)phosphino]phenyl}ether oxide (DPEPO) with a high triplet energy level (2.995 eV), was chosen to prove an effective strategy for multi-insulating linkage of highly efficient hosts blue electrophosphorescence. structure, photophysical properties, molecular orbitals, and device performance were investigated (see graphic; FMO=frontier orbital). Detailed facts importance specialist readers are published as "Supporting Information"....

A Dy2 single-molecule magnet was isolated using a mixed ligand strategy in which the DyIII ions adopt distinct coordination environments. This leads to two unique relaxation modes due single-ion type mechanism. Energy barriers were obtained from individually fitting overlapping peaks.

The syntheses, structures, and magnetic properties are reported for four new lanthanide clusters [Sm(4)(μ(3)-OH)(2)L(2)(acac)(6)]·4H(2)O (1), [Gd(4)(μ(3)-OH)(2)L(2)(acac)(6)]·4CH(3)CN (2), [Ln(4)(μ(3)-OH)(2)L(2)(acac)(6)]·2H(2)L·2CH(3)CN (3, Ln = Tb; 4, Dy) supported by salen-type (H(2)L N,N'-bis(salicylidene)-1,2-cyclohexanediamine) β-diketonate (acac acetylacetonate) ligands. were confirmed to be essentially isomorphous infrared spectroscopy single-crystal X-ray diffraction. Their crystal...

Two dibenzothiophene (DBT)-based phosphine oxide hosts, named 4-diphenylphosphoryl (DBTSPO) and 4,6-bis(diphenylphosphoryl) (DBTDPO), were prepared by short-axis substitution with the aim to selectively adjust electrical properties. The combined effects of involvement electron-donating S atom in conjugation effectively suppress influence electron-withdrawing diphenylphosphine (DPPO) moieties on frontier molecular orbitals optical Therefore, DBTSPO DBTDPO have nearly same hole injection...

The effective strategy of indirect linakge for constructing ternary ambipolar phosphine oxide (PO) hosts with the high first triplet energy levels (T(1)) was successfully demonstrated. interplay between chromophore, hole and electron transporting moieties effectively restrained. Both T(1) as 3.0 eV characteristics were perfectly realized, which consequently resulted in highly efficient blue-emitting phosphorescent organic light-emitting diodes low driving voltage stable efficiencies.

A new bis-β-diketone, 3,3′-bis(4,4,4-trifluoro-1,3-dioxobutyl)biphenyl (BTB), has been designed and prepared for the synthesis of a series dinuclear lanthanide complexes [Ln2(BTB)3(C2H5OH)2(H2O)2] [Ln = Eu (1), Gd (2)], [Ln2(BTB)3(DME)2] Nd (3), Yb (4); DME ethylene glycol dimethyl ether] [Eu2(BTB)3(L)2] [L 2,2-bipydine (5); 1,10-phenanthroline (6); 4,7-diphenyl-1,10-phenanthroline (7)]. Complexes 1–7 have characterized by various spectroscopic techniques their photophysical properties are...

A family of two-dimensional salen-type lanthanide complexes was synthesized through a facile solution diffusion method. The were characterized by single-crystal X-ray diffraction (SCXRD) and photoelectron spectroscopy (XPS) analytical techniques. SCXRD XPS analyses reveal that the obtained structures are rich in uncoordinated imine (−CH═N−) groups located on skeleton organic ligand, which retain strong coordination ability with metal ions. On basis this unique feature, highly dispersed...

Through-space charge transfer (TSCT) is crucial for developing highly efficient thermally activated delayed fluorescence polymers. The balance of intra- and interchain TSCT can markedly improve performance, but it still a big challenge. In this work, an effective strategy "intra- balance" demonstrated by way series non-conjugated copolymers containing 9,9-dimethylacridine donor triazine-phosphine oxide (PO)-based acceptors. Steady-state transient emission spectra indicate that compared to...

The assembly shows the structural transformation from a multiple species mixture Eu 2 (LR) n to helicate 4 upon increasing content of CHCl 3 in CH CN, which was accompanied by an enhanced CPL activity.

A new β-diketone, 2-(2,2,2-trifluoroethyl)-1-indone (TFI), which contains a trifluorinated alkyl group and rigid indone group, has been designed employed for the synthesis of two series TFI lanthanide complexes with general formula [Ln(TFI)(3)L] [Ln = Eu, L (H(2)O)(2) (1), bpy (2), phen (3); Ln Sm, (4), (5), (6); 2,2'-bipyridine, 1,10-phenanthroline]. X-ray crystallographic analysis reveals that 1-6 are mononuclear, central Ln(3+) ion eight-coordinated by six oxygen atoms furnished three...

Highly efficient green and red electro-phosphorescence is achieved in devices with the host material DPESPODEF3. The multiple fluorenyl moieties of are arranged such that it has an unsymmetrical molecular configuration, its triplet-state location tuned independent energy (ET) charge transfer (CT) channels. As a result, DPESPODEF3 can suppress triplet-triplet annihilation triplet-polaron quenching. In resulting phosphorescent devices, impressive external quantum efficiencies ca. 20% 16% power...

Three dinuclear [Ln2H2OL12(acac)2]·solvent (1, Ln = Gd, solvent 2CH2Cl2; 2, Tb, no solvent; 3, Er, (C2H5)2O), and two tetranuclear lanthanide clusters [Ln4(μ3-OH)2L22(acac)6]·2(solvent) (4, CH3OH; 5, Dy, CH3CN) were characterized in terms of structure, fluorescence magnetism. The complexes constructed by a rigid salen-type ligand H2L1 N,N′-bis(salicylidene)-o-phenylenediamine β-diketonate (acac acetylacetonate) ligands, while the formed from flexible H2L2...

A series of new isostructural lanthanide metal–organic frameworks (Ln-MOFs), [Ln2(L)2(DMAC)2]·nH2O [Ln = La (1), Pr (2), Nd (3), Sm (4), Eu (5), Gd (6), Tb (7), and Tm (8); H4L 5-(bis(4-carboxybenzyl)amino)-isophthalic acid, DMAC N,N′-dimethylacetamide], have been isolated. Single-crystal X-ray diffraction analysis reveals that all complexes exhibit a rare (4,8)-connected alb-4,8-P topology with binuclear [Eu2(COO)8]n secondary building units as 8-connected nodes ligands 4-connected nodes....

Self-assembly of multiple components into well-defined and predictable structures remains one the foremost challenges in chemistry. Here, upon subtle ligand variation, we reported on assembly three new polyoxometalate-based organic–inorganic hybrid compounds with different helical channel, [Ag3(H2pyttz-I)2][PMo12O40] (1), [Ag6(H2pyttz-II)4][CoW12O40]·2H2O (2), [Ag7(Hpyttz-II)3(H2pyttz-II)][GeW12O40]·7H2O (3) (H2pyttz-I/II = 4-/3-pyrid-5-(1H-1,2,4-triazol-3-yl)-1,2,4-triazolyl, POM...

H₂TFBDC lanthanide complexes emitting white light was synthesized and a luminescent sensor for the detection of benzaldehyde has been produced.

An ambipolar ternary deep-blue emitter with CIE coordinates of (0.15, 0.07) and high electroluminescent performance was constructed on the basis an insulated donor–π–acceptor system through indirect linkage.

An unusual dinuclear Yb(2) complex isolated using a mixed ligand strategy leads to field-induced SMM behaviour. Low magnetic axiality and large tunnelling gap lead significant quantum of the magnetisation, which was reduced under an applied static optimum field 1600 Oe.

Abstract: This study proposes a new concept of pH-sensitive poly(lactide-co-glycolide) (PLGA) nanoparticle composite microcapsules for oral delivery insulin. Firstly, insulin–sodium oleate complex was prepared by the hydrophobic ion pairing method and then encapsulated into PLGA nanoparticles emulsion solvent diffusion method. In order to reduce burst release insulin from deliver specific gastrointestinal regions, hence enhance bioavailability insulin, were further Eudragit ® FS 30D prepare...

Two interesting hybrids based on polyoxometalates (POMs) and silver-tetrazolate subunits, H[Ag11(pytz)6(H2O)3(P2W18O62)]·H2O (1), H[Ag17(pytz)12(H2O)6(PMo12O40)2] (2) (pytz = 5-(2-pyridyl)tetrazolate), have been synthesized structurally characterized. X-ray diffraction analysis reveals that the periphery of Wells–Dawson POMs contains 16 Ag-pytz subunits in compound 1, which represents highest connection up to now. In crystal engineering point view, all Ag atoms, POMs, ligands, exhibit rich...

A series of rigid hexadentate salen-type (H2L) ytterbium complexes, namely, [Yb2L3(CH3OH)]·3CH3CN (1), [Yb2LL′L″(CH3OH)(H2O)2](ClO4)2·CH3OH·H2O (2), [Yb2L(OAc)4(CH3OH)2]·2CH3OH (3), and {[Yb2L(OAc)4]·3H2O}n (4) (H2L = N,N′-bis(2-oxy-3-methoxybenzylidene)-1,2-phenylenediamine, HL′ 2-(2′-hydroxy-3′-methyloxy-phenyl)benzimidazole HL" 3-methoxysalicylaldehyde) have been synthesized by reactions H2L with multifarious Yb3+ salts. X-ray crystallographic analyses demonstrate that complex 1 is a...

A series of three β-diketone mononuclear dysprosium complexes, namely, Dy(TFI)3(H2O)2 (1), Dy(TFI)3(bpy) (2), and [Dy(TFI)3(Phen)]·0.02CHCl3 (3) (TFI = 2-(2,2,2-trifluoroethyl)-1-indone, bpy 2,2'-bipyridine, phen 1,10-phenanthroline) have been designed synthesized. Crystal structure analysis reveals that complexes 1-3 haveisomorphic structures in which the central Dy(III) ion is eight-coordinated by six oxygen atoms from TFI ligands two O/N auxiliary ligands, forming a distorted bicapped...

Abstract An efficient host for blue and green electrophosphorescence, 4,6‐bis(diphenylphosphoryl)dibenzofuran ( o‐ DBFDPO ), with the structure of a short‐axis‐substituted dibenzofuran was designed synthesised. It appears that greater density diphenylphosphine oxide (DPPO) moieties in short‐axis substitution configuration effectively restrains intermolecular interactions, because only very weak π–π stacking interactions could be observed, centroid‐to‐centroid distance 3.960 Å. The improved...