A novel M2L2 molecular tube capable of binding fullerene C60 was synthesized from bispyridine ligands with embedded anthracene panels and Ag(I) hinges. Unlike previous cages capsules, this open-ended tubular host can accommodate a single molecule various derivatives large substituents. The guest then be released by using the ideal, noninvasive external stimulus, light.

Abstract The lack of structural information impeded the access efficient luminescence for exciplex type thermally activated delayed fluorescence (TADF). We report here pump-probe Step-Scan Fourier transform infrared spectra composed a carbazole-based electron donor (CN-Cz2) and 1,3,5-triazine-based acceptor (PO-T2T) codeposited as solid film that gives intermolecular charge transfer (CT), TADF, record-high cyan organic light emitting diodes (external quantum efficiency: 16%). transient...

Abstract Near‐infrared organic light‐emitting diodes (NIR OLEDs) enable many unique applications ranging from night‐vision displays and photodynamic therapies. However, the development of efficient NIR OLEDs with a low efficiency roll‐off is still challenging. Here, series new heteroleptic Pt(II) complexes ( 1 – 4 ) flanked by both pyridyl pyrimidinate functional azolate chelates are synthesized. The reduced ππ * energy gap chelate, strong intermolecular interaction high crystallinity in...

Abstract The design of square‐planar Pt(II) complexes with highly efficient solid‐state near infrared (NIR) luminescence for electroluminescence is attractive but challenging. This study presents the fine‐turning excited‐state properties and application a series isoquinolinyl pyrazolate that are modulated by steric demanding substituents. It reveals bulky substituents do not always disfavor metallophilic Pt···Pt interactions. Instead, π–π stacking among chelates, which fine‐tuned associated...

A switch in time: Gel–sol transitions of a urea-based [2]rotaxane gelator are controlled by the degree solvent exposure hydrogen-bond-donating urea station and orientation hydrogen-bond-accepting CO groups interlocked ethylene glycol based macrocycle (N blue, O red, phenyl green). Both acid/base anion-exchange control can be used to reversibly transition rotaxane 1-pentanol between solution gel states.

Various substituted dioxythiophenes bearing 3,4-propylenedioxythiophenes (ProDOT) and 3,4-ethylenedioxythiophene (EDOT) moieties successfully undergo Pd-catalyzed direct C–H arylation to yield π-conjugated polymers. The effects of palladium catalysts, phosphine ligands or additives, functional groups on this facile polycondensation approach are investigated. Polymers from alkoxy-substituted ProDOT synthesized with reasonable molecular weight (Mn = 6100–9600) low PDI (1.3–1.9). Four EDOT...

Abstract Pt(II) metal complexes are known to exhibit strong solid‐state aggregation and promising for realization of efficient emission in fabrication organic light emitting diodes (OLED) with nondoped emitter layer. Four pyrimidine–pyrazolate based chelates, together four isomeric complexes, namely: [Pt(pm2z) 2 ], [Pt(tpm2z) [Pt(pm4z) [Pt(tpm4z) isolated systematically investigated their structure–property relationships practical OLED applications. Detailed single molecular aggregated...

The neat phase behavior of 28 phosphonium salts (nPmA), each with three equivalent long n-alkyl chains containing m carbon atoms and one shorter chain n or a benzyl group, have been examined. Eighteen form liquid-crystalline smectic A2 (SmA2) phase, where the lipophilic assemble in bilayers that sandwich an "ionic plane" consisting array anions positively charged phosphorus atoms. Several analogous ammonium are examined as well. These first structures reported for amphiphiles single atom...

Reported here is a cooperative effect that the sensing efficiency of active group on gold nanoparticles (GNPs) can be significantly influenced by another proximal functional group. We previously developed visual scheme for K+ 15-crown-5-CH2O(CH2)12SH functionalized GNPs in aqueous matrix. Upon adding K+, GNP solution changes from red to blue. Such transform triggered 2-to-1 sandwich complexation crown resulting shift surface plasmon absorption due aggregation. Herein, we discover introducing...

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTRu3(CO)9(μ3-η2,η2,η2-C60): A Cluster Face-Capping, Arene-Like Complex of C60Hsiu-Fu Hsu and John R. ShapleyView Author Information Department Chemistry the Frederick Seitz Materials Research Laboratory University Illinois, Urbana, Illinois 61801 Cite this: J. Am. Chem. Soc. 1996, 118, 38, 9192–9193Publication Date (Web):September 25, 1996Publication History Received20 June 1996Published online25 September inissue 1 January...

Abstract A series of new mesomorphic platinum(II) complexes 1 – 4 bearing pyridyl pyrazolate chelates are reported herein. In this approach, azolate ligands have been strategically functionalized with tris(alkoxy)phenyl groups various alkyl chain lengths. As a result, they ascribed to class luminescent metallomesogens that possess distinctive morphological properties, such as their intermolecular packing arrangement and associated photophysical behavior. CH 2 Cl , independent the applied...

A series of new organogelators with π-conjugated phenylethynyl framework featuring long-chain carboxamides have been synthesized. These organgelators shown great ability to gel a variety organic solvents form stable organogels the minimum gelation concentration as low 0.1 wt %. Gelation is completely thermoreversible, and it occurs due aggregation resulting in formation fibrous network via combination intermolecular hydrogen bonding, π−π stacking, van der Waals interactions that observed for...

We describe a novel class of tetraphenylbenzene-based discotic molecules with exceptional self-assembling properties. Absorption and fluorescence studies confirmed the formation J-type aggregates in solution. The mesogens also show an enhancement emission upon aggregation. Interestingly, these displayed enantiotropic hexagonal columnar liquid crystal (LC) phases that can be switched into helical organization by application electric field. columns arise from electric-field-induced tilt polar...

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTADDITION / CORRECTIONThis article has been corrected. View the notice.Cooperative Chirality in Columnar Liquid Crystals: Studies of Fluxional Octahedral MetallomesogensScott T. Trzaska, Hsiu-Fu Hsu, and Timothy M. SwagerView Author Information Department Chemistry Massachusetts Institute Technology, 77 Ave. Cambridge, 02139 Cite this: J. Am. Chem. Soc. 1999, 121, 18, 4518–4519Publication Date (Web):April 24, 1999Publication History Received6...

2,3,8,9,14,15-Hexakis(alkoxy)diquinoxalino[2,3-a:2',3'-c]phenazines with alkyl side chains varying from 6 to 12 carbon atoms were readily synthesized by the condensation of hexaketocyclohexane respective 1,2-bisalkoxy-4,5-diaminobenzene. Polarization microscopy and DSC studies showed all these compounds exhibit a very wide mesophase range over 150 degrees C. An interesting D(hd) D(rd) transition was observed for octyl derivative 3b, as determined X-ray diffraction measurements. The hexyl...

Dendrons Gn-Cl and Gn-NH (n = 2-4) novel dendrimers Gn-N approximately N-Gn based on triazine piperazine units were efficiently prepared in good yields without employing the protection deprotection processes are fully characterized by 1H NMR 13C spectroscopies, elemental analysis, mass spectroscopy. These compounds transparent possess thermal stability. G4-Cl shows a monotropic columnar phase narrow range with coexisting crystalline phase. Dendron G4-NH rectangular column-phase, dendrimer...

In refluxing chlorobenzene C60 reacts with Ru5C(CO)15 or Ru6C(CO)17 to form new complexes, which are isolated following treatment tertiary phosphines give the structurally characterized, face-bonded derivatives Ru5C(CO)11(PPh3)(μ3-η2:η2:η2-C60) (1) and Ru6C(CO)12(dppm)(μ3-η2:η2:η2-C60) (2).

Three homoleptic Pt(II) metal complexes [Pt(imPz)2] (1), [Pt(imiz)2] (2), and [Pt(imMz)2] (3) were synthesized from the treatment of Pt(DMSO)2Cl2 functional imidazolyl pyrazole in refluxing tetrahydrofuran (THF). Alternatively, heteroleptic [Pt(imPz)(fppz)] (4), [Pt(imiz)(fppz)] (5), [Pt(imMz)(fppz)] (6) obtained a common intermediate [Pt(fppzH)Cl2] with corresponding chelate. 1, 2, 5 studied by single-crystal X-ray diffraction to reveal packing arrangement their crystal lattices, among...

[structure: see text] A new donor-acceptor, 1,4,5,8,9,12-hexaazatriphenylene HATCNOR(n), is described. The synthesis of HATCNOR1 and HATCNOR6 achieved by the regioselective displacement hexacarbonitrile (HATCN) with an alkoxy group. X-ray analysis revealed self-assembly in solid state. difunctionalized hexaazatriphenylene discotic liquid crystal.

Abstract Two series of unconventional triazine‐based dendrimers with C 2 symmetry and 3 were prepared. The newly prepared ‐symmetrical characterized by 1 H 13 NMR spectroscopy, mass spectrometry, elemental analysis. Differential scanning calorimetry, polarizing microscopy, powder XRD showed that the display columnar liquid‐crystalline phases during thermal treatment, but not observed to behave correspondingly. molecular conformations ‐ obtained computer simulation MM2 model CaChe program in...

Gel-Sol-Übergänge eines [2]Rotaxan-Gelators werden über die Zugänglichkeit der Harnstoff-Bindestelle (Wasserstoffbrückendonor) und Orientierung CO-Gruppen (Wasserstoffbrückenakzeptor) im Makrocyclus mit Ethylenglycolteil gesteuert (siehe Bild; N blau, O rot, Phenylgruppen grün). Lösungen des Rotaxans in 1-Pentanol können durch Säure/Base-Zusatz oder Anionenaustausch reversibel zwischen Sol- Gelzustand wechseln.