A dramatic color change and tremendous emission enhancement have been "switched on" upon increasing diethyl ether ratio in acetonitrile or acetone solution of [Pt(tpy)(CC-CCH)]OTf, attributed to the formation Pt...Pt pi-pi interactions. Two crystal forms (dark-green red) together with [Pt(tBu3-tpy)(CC-CCH)]OTf, show different crystal-packing modes as revealed by X-ray crystallography.

Complexes of platinum(II) with polypyridine (that is, the multidentate ligands related to pyridine, such as bipyridine or terpyridine) have rich photophysical properties. These compounds are able give different crystal forms in solid state: this polymorphism is evident broad range colors that can be observed samples. Because square-planar coordination geometry metal center, Pt···Pt well π-π interactions between chromophoric polypyridyl moieties thought contribute polymorphism. Owing limited...

This highlight focuses on various luminescent complexes with different transition metal centres of d(6), d(8) and d(10) electronic configurations. Through the systematic study variation ligands, structural bonding modes centres, structure-property relationships classes can be obtained. With knowledge fundamental understanding their photophysical behaviours, absorption luminescence properties fine-tuned. Introduction supramolecular assembly hierarchical complexity involving non-covalent...

A new class of amphiphilic anionic platinum(II) bzimpy complexes has been demonstrated to show aggregation in water through Pt···Pt and π–π stacking interactions. An interesting aggregation–partial deaggregation–aggregation process a morphological transformation from vesicles nanofibers have demonstrated. These changes can be systematically controlled by the variation solvent composition could readily probed UV–vis absorption, emission, NMR, transmission electron microscopy, even with our naked eyes.

A series of luminescent cyclometalated rhodium(III) complexes have been designed and prepared. The improved luminescence property is realized by the judicious choice a strong σ-donor cyclometalating ligand with lower-lying intraligand (IL) state that would raise d–d excited introduction emissive IL state. These exhibit high thermal stability considerable quantum yields as up to 0.65 in thin film, offering themselves promising light-emitting materials OLEDs. Respectable external efficiencies...

A series of platinum(II) terpyridyl acetylide complexes, [Pt(trpy)(C⋮CR)]PF6 (R = C6H5, C6H4Cl-4, C6H4CH3-4, C6H4OCH3-4, C6H4NO2-4, benzo-15-crown-5, C6H3-(OCH3)2-3,4), have been synthesized and characterized. Their luminescence electrochemical behaviors studied. The ion-binding properties [Pt(trpy)(C⋮C-benzo-15-crown-5)]PF6 the X-ray crystal structure [Pt(trpy)(C⋮CC6H5)]PF6 are also reported.

A series of alkynylplatinum(II) complexes 2,6-bis(N-alkylbenzimidazol-2′-yl)pyridine has been synthesized and characterized by 1H NMR, IR, FAB mass spectrometry, elemental analysis; the photophysical properties have also investigated. All shown to exhibit interesting gelation properties. Scanning electron microscopy (SEM) xerogels showed a network fibrous structures, typical morphologies organogels/metallogels. Interestingly, two were found show strong luminescence enhancement upon...

A series of platinum(II) terpyridyl alkynyl complexes that have been derivatized with basic amino functionalities, [Pt(tpy)(C[triple bond]C-C6H4-NR2-4]X (X = OTf-, R CH3 1, CH2CH2OCH3 2, H 3; X Cl-, 4, 5, 6) (tpy 2,2':6',2' '-terpyridine), synthesized and characterized. Their photophysical responses at various acid concentrations were studied. The abilities the to function as colorimetric luminescence pH sensors demonstrated dramatic color changes enhancement upon introduction acid.

A series of platinum(II) terpyridyl complexes has been demonstrated to show gelation properties driven by Pt⋯Pt and π–π interactions in addition hydrophobic–hydrophobic interactions; counter-anions have found affect strongly the colour metallogel.

Abstract A series of platinum( II ) terpyridyl complexes [Pt(tpy)(CCCCH)]X, 1 ‐X (X=OTf − ; PF 6 ClO 4 BF BPh ); [Pt(tpy)(CCC H 5 )]X, 2 OCH 3 ‐4)]OTf, ‐OTf, and [Pt(4′‐CH O‐tpy)(CCC )]OTf, ‐OTf (tpy=2,2′:6′,2′′‐terpyridine, OTf=trifluoromethanesulfonate) were synthesized their photophysical properties determined. Electronic absorption emission studies showed the formation a new band upon increasing diethyl ether content in an acetonitrile/diethyl mixture. This was ascribed to complex...

Deprotonation of polycarboxylic acids induces the self-assembly terpyridylplatinum(II) complexes (see picture) and triggers remarkable changes in UV/Vis spectra emission intensities. The electronic arise from metal-metal-to-ligand charge transfer transitions resulting aggregation complexes.

A new phosphorescent material of cyclometalated alkynylgold(III) complex, [Au(2,5-F2C6H3−C∧N∧C)(C≡C−C6H4N(C6H5)2-p)] (1) (2,5-F2C6H3−HC∧N∧CH = 2,6-diphenyl-4-(2,5-difluorophenyl)pyridine), has been synthesized, characterized, and its device performance investigated. This luminescent gold(III) complex was found to exhibit rich PL EL properties utilized as dopants OLEDs. At an optimized dopant concentration 4%, a with maximum external quantum efficiency (EQE) 11.5%, corresponding current 37.4...

A new class of luminescent cyclometalated alkynylgold(III) complexes, [Au(RC=N(R')=CR)(CCR' ')], i.e., [Au(C=N=C)(C triple bond CR'')] (HC=N=CH = 2,6-diphenylpyridine) R' ' C6H5 1, C6H4-Cl-p 2, C6H4-NO2-p 3, C6H4-OCH3-p 4, C6H4-NH2-p 5, C6H4-C6H13-p 6, C6H13 7, [Au(tBuC=N=CtBu)(C CC6H5)] 8 (HtBuC=N=CtBuH 2,6-bis(4-tert-butylphenyl)pyridine), and [Au(C=NTol=C)(CCC6H4-C6H13-p)] 9 (HC=NTol=CH 2,6-diphenyl-4-p-tolylpyridine), have been synthesized characterized. The X-ray crystal structures most...

Single-stranded nucleic acids, which carry multiple negative charges in an aqueous medium at near neutral pH, are found to induce the aggregation and self-assembly of positively charged alkynylplatinum(II) terpyridyl complexes via electrostatic binding platinum single-stranded as revealed by appearance new UV-vis absorption emission bands upon addition acids a buffer solution complex. Changes intensity pattern circular dichroism (CD) spectroscopy also observed, many consistent with assembly...

Luminous: The AuIII alkynyl complexes [Au(C^N^C)(CCR)] [HC^N^CH=2,6-diphenylpyridine, R=C6H5 (1), C6H4-Cl-p (2), C6H4-OCH3-p (3), C6H4-NH2-p (4); HC^N^CH=2,6-bis(4-tert-butylphenyl)pyridine, (5)] were prepared, and the molecular structure of 1 was characterized (see picture). Complexes 1–5 display luminescence in solution solid state both at low ambient temperature.

Sticking together: Dinuclear platinum(II) terpyridyl complexes display a high tendency towards intramolecular self-association, in which the two Pt terpy units "stick together". The driving force is provided by metal–metal and π–π interactions can be controlled temperature modulation. Supporting information for this article available on WWW under http://www.wiley-vch.de/contents/jc_2002/2006/z600962_s.pdf or from author. Please note: publisher not responsible content functionality of any...

Emission control: Carbazole-based dendritic alkynylgold(III) complexes have been evaluated as phosphorescent emitters in organic light-emitting devices. The energy well the bathochromic shift of emissions can be tuned effectively through a control dendrimer generation (see spectra). optimized devices show high current and external quantum efficiencies up to 24.0 cd A−1 7.8 %, respectively. As service our authors readers, this journal provides supporting information supplied by authors. Such...

A new class of luminescent mononuclear and dinuclear N-heterocyclic carbene-containing gold(III) complexes has been synthesized characterized. The X-ray crystal structures most the have also determined. Electrochemical studies reveal a ligand-centered reduction originated from RC--N--CR moieties with no oxidation waves. Interestingly, one exhibited two distinct couples instead first occurring at less cathodic potential, probably related to splitting pi* orbital-based LUMO resulting...

A series of multiaddressable platinum(II) molecular rectangles with different rigidities and cavity sizes has been synthesized by endcapping the U-shaped diplatinum(II) terpyridine moiety various bis-alkynyl ligands. The studies host-guest association square planar platinum(II), palladium(II), gold(III) complexes related low-dimensional gold(I) complexes, most which are potential anticancer therapeutics, have performed. Excellent guest confinement selectivity rectangular architecture shown....

A novel molecular tweezers-type complex 1, based on a phosphorescent cationic alkynylplatinum(II) terpyridine building block, has been synthesized and characterized by NMR, mass spectroscopy, elemental analysis X-ray diffraction study. Host–guest chemistry of the host 1 various guest metal complexes with different ligands, charges and/or centres investigated. Various including negatively charged platinum can interact in : manner, which is contrast to commonly observed formation insoluble...

The exploration of phosphorescent materials based on transition metal‐ligand chromophoric complexes represents an important area research in molecular materials. knowledge and fundamental understanding their photophysical properties offer a possible fine‐tuning electronic absorption luminescence properties. strong propensity d 8 metal compounds to form non‐covalent metal···metal interactions facilitates supramolecular assembly the formation nanostructures with interesting introduction...

Significance Metallosupramolecular π-conjugated amphiphiles have emerged as a building block for supramolecular architectures owing to their interesting luminescence behavior and propensity form noncovalent metal–metal interactions. This work represents the first example, our knowledge, of alkynylplatinum(II) terpyridine system that can undergo assembly into tubular nanostructures. The modulation on steric bulk moieties could control formation designated molecular architectures, ranging from...

A new class of bipolar alkynylgold(III) complexes containing triphenylamine and benzimidazole moieties has been synthesized, characterized, applied as phosphorescent dopants in the fabrication solution-processable organic light-emitting devices (OLEDs). The incorporation methyl groups central phenyl unit found to rigidify molecule reduce nonradiative decay, yielding a high photoluminescence quantum yield up 75% spin-coated thin films. In addition, realization highly efficient OLEDs with an...