The performance of hybrid organic perovskite (HOP) for solar energy conversion is driving a renewed interest in their light emitting properties. recent observation broad visible emission layered HOP highlights potential as white-light emitters. Improvement the efficiency material requires better understanding its photophysical We present in-depth experimental investigations (WL) thin films (C6H11NH3)2PbBr4. broadband, strongly Stokes shifted presents maximum at 90 K when excited 3.815 eV,...

Novel, polymeric linear chains of Keggin polyoxometalate units PMnW11O39 linked through Mn-O-W bridges (see picture below) are present in the structure title compound 1. The alternate with layers organic donor bis(ethylenedithio)tetrathiafulvalene (ET). Compound 1 promises interesting material properties resulting from combination localized magnetic moments delocalized electrons.

We report a two-dimensional Hofmann-like spin-crossover (SCO) material, [Fe(trz-py)2{Pt(CN)4}]·3H2O, built from [FePt(CN)4] layers separated by interdigitated 4-(2-pyridyl)-1,2,4,4H-triazole (trz-py) ligands with two symmetrically inequivalent FeII sites. This compound exhibits an incomplete first-order spin transition at 153 K between fully high-spin (HS–HS) and intermediate low-spin (HS–LS) ordered states. At low temperature, it undergoes bidirectional photoswitching to HS–HS (LS–LS)...

Organic–inorganic hybrid perovskites (OIHP) are developing rapidly as high-performance semiconductors for solid-state solar cells and light emitting devices. Recently, lead-halide two-dimensional (2D) OIHP were found to present bright broadband visible emission, thus, highlighting their potential single component white-light (WL) emitters. This contribution deals with the preparation of a new Cd-based 2D perovskite, chemical formula (C6H11NH3)2CdBr4 (abbreviated compound 1), which structural...

Multifunctional mononuclear iron(<sc>ii</sc>) complex coordinated with six phosphorescent ligands exhibiting correlated spin-crossover transition and enhanced fluorescence.

Reaction of NaN3 with the [CuII(tn)]2+ ion (tn = 1,3-diaminopropane) in basic aqueous solution yields azido-bridged complex formula [Cu2(tn)2(N3)4] (1), which is characterized by X-ray crystallography. The structure 1 made up dinuclear neutral complexes, [Cu2(tn)2(N3)4], resulting from assembling two mononuclear units through equivalent end-on azide bridges connecting asymmetrically Cu(tn)(N3)2 entities. These are connected asymmetric end-to-end N3 to form a chain dimers. Magnetic...

The syntheses, crystal structures, and physical properties of the series radical salts made with bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF or ET) monosubstituted α-Keggin polyoxoanions formula [XZ(H2O)M11O39]5- (XZM11 = SiIVFeIIIMo11, SiIVCrIIIW11, PVCoIIW11, PVNiIIW11, PVCuIIW11 PVZnIIW11, PVMnIIW11, PVMnIIMo11) containing a magnetic metal ion Z on peripheral octahedral site Keggin anion are reported. They all crystallize in two related called α2 α3. general structure consists...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCoexistence of Magnetic and Delocalized Electrons in Hybrid Molecular Materials. The Series Organic-Inorganic Radical Salts (BEDT-TTF)8[XW12O40](solv)n (X = 2(H+), BIII, SiIV, CuII, CoII, FeIII; solv H2O, CH3CN)Carlos J. Gomez-Garcia, Carlos Gimenez-Saiz, Smail Triki, Eugenio Coronado, Pierre Le Magueres, Lahcene Ouahab, Laurent Ducasse, Claude Sourisseau, DelhaesCite this: Inorg. Chem. 1995, 34, 16, 4139–4151Publication Date (Print):August 1,...

A new dinuclear complex [{Fe(tpc-OBn)(NCS)(μ-NCS)}2] (1) based on the tripodal tpc-OBn ligand (tpc-OBn = tris(2-pyridyl)benzyloxymethane), containing bridging μ-κN:κS-SCN and terminal κN-SCN thiocyanate ligands, has been prepared characterized by single crystal X-ray diffraction, magnetic studies, DFT theoretical calculations. This represents first example of FeII with double bridges in a head-to-tail configuration that exhibits ferromagnetic coupling between metal ions (JFeFe +1.08 cm–1)....

The present work deals with a new one-dimensional (1D) organic–inorganic hybrid material, namely (C9H10N2)PbCl4 (abbreviated as AQPbCl4). Its crystal structure is built up from the infinite 1D chain of edge-sharing PbCl6 octahedra surrounded by 3-aminoquinoline AQ) organic molecules. Contrary to most materials, where moieties act barriers and inorganic parts play role quantum wells, both in AQPbCl4 are optically active, giving rise optical properties involving competition interaction two...

Alternating layers of radicals the π-electron donor 1 and polyoxonions [CoW12O40]6− (2, polyhedral representation) are contained in title compound. Thus, organic charge carriers inorganic electron-acceptor components lie next to each other. Since polyoxometalates can accommodate different metal ions at specific sites, such anions attractive precursors for preparation radical cation salts with new electrical magnetic properties.

New iron(II) complexes of formulas [Fe(abpt) 2(tcm) 2] ( 1), 2(tcnome) 2), and 2(tcnoet) 3) (abpt = 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole, tcm (-) [C(CN) 3] tricyanomethanide anion; tcnome [(NC) 2CC(OCH 3)C(CN) 1,1,3,3-tetracyano-2-methoxypropenide tcnoet 2CC(OC 2H 5)C(CN) 1,1,3,3-tetracyano-2-ethoxypropenide anion) have been synthesized characterized by infrared spectroscopy, magnetic properties variable-temperature single-crystal X-ray diffraction. The crystal structure...

We report a triazole-based trinuclear Fe^II complex as the first example that displays sharp and complete spin transition. The strong ferro-elastic coupling between three metal centers was identified source of concerted

Optical and structural properties of the organic-inorganic hybrid perovskite-type (C6H11NH3)2[PbI4] (abbreviated as C6PbI4) were investigated using optical absorption, photoluminescence (PL), x-ray diffraction measurements. Room temperature, absorption measurements, performed on spin-coated films C6PbI4, revealed two bands at 2.44 3.21 eV. Upon 325 nm (3.815 eV) laser irradiation, strong green PL emission peaks observed 2.41 eV (P1) 2.24 (P2) assigned to free localized excitons,...

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTCooperative 1D Triazole-Based Spin Crossover FeII Material With Exceptional Mechanical ResilienceNarsimhulu Pittala†, Franck Thétiot†, Smail Triki*†, Kamel Boukheddaden‡, Guillaume Chastanet§, and Mathieu Marchivie§View Author Information† UMR-CNRS 6521, University de Brest (UBO), 6 Avenue V. Le Gorgeu, C.S. 93837-29238 Cedex 3, France‡ GEMaC, 8635, Paris-Saclay, 45 des Etats-Unis, 78035 Versailles, France§ CNRS, Bordeaux, ICMCB, UPR 9048, 87...

A new polymeric approach, based on cyanocarbanion ligands, for the design of spin crossover (SCO) compounds led us to compound [Fe(abpt)2(tcpd)] (1) (tcpd2− = (C[C(CN)2]3)2−, abpt 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole) which has been characterised as first SCO molecular chain involving a bridging ligand.

The use of the recently prepared polynitrile ligand tcnopr3OH(-) ([(NC)(2)CC(OCH(2)CH(2)CH(2)OH)C(CN)(2)](-)) with different salts Fe(II), Co(II), and Ni(II) has led to a very rare example linkage isomerism in coordination chain. These pairs isomers can be formulated as [M(tcnopr3OH-κN,κO)(2)(H(2)O)(2)]; M = Fe (1), Co (3), Ni(5) [M(tcnopr3OH-κN,κN')(2)(H(2)O)(2)]; (2), (4), Ni (6). Compounds 1-2, 3-4, 5-6 are three since they present same formula chain structure only differ connectivity...

A series of soft spin crossover (SCO) [Fe(Htrz)2(trz)](BF4)/NaPSS composites have been prepared by dispersing rod-shaped particles different lengths (32 nm, 65 474 nm and 1.2 µm) in a...

A novel spin-crossover (SCO) dinuclear complex, [Fe2(μ2-cp-trz)3(cp-trz)2(tcm)4] (cp-trz = 4-cyclo-pentyl-1,2,4-triazole, tcm- tricyanomethanide anion), was synthesized and thoroughly characterized. Crystallographic analyses at 250 180 K revealed a centrosymmetric structure with Fe(II) centers bridged by triazole ligands. The complex exhibits cooperative hysteretic thermally induced abrupt one-step spin transition between high-spin (HS) low-spin (LS) states. Magnetic measurements (Magn),...

An unprecedented coordination mode for the highly conjugated cyanocarbanion [C{C(CN)2}3]2− (1) is observed in title complexes. This ligand employs four of its six CN groups a μ4-η4 bridging to form two unique three-dimensional polymers.